importance_of_seismic_restraints_on_hot_water_cylinder

The Importance Of Seismic Restraints

Do you want this to happen to your cylinder?

importance_of_seismic_restraints_on_hot_water_cylinder

If you don’t, seismic restrains are an excellent choice when installing your cylinder.

What are seismic restraints?
Seismic restraints for hot water cylinders are steel straps used to keep a hot water cylinder in place, preventing it from falling during an earthquake. They are affixed by screwes and washers of a certain standard to the wall framing around the cylinder. Hot water cylinders are heavy items, with a 135 litre cylinder weighing around 170 kg when it’s full of water. If there are no restrains, this is quite a lot of weight to be flung around in an earthquake, not to mention if you have an even bigger one. It can also damage other items such as pipes which are connected to it, and cause a flood.

Along with this, NZBC B1.3.2 standard requires building elements (including storage water heaters) to be adequately supported including support against earthquake forces. The method illustrated in Figure 14 is acceptable for water heaters up to 360 litre capacity. Where fittings and pipework are attached to the water heater through the supporting platform or floor a 50 mm minimum clearance shall be provided between the fitting and the support structure. 6.11.5 An alternative acceptable solution for securing storage water heaters against seismic forces is given in Section 203 of NZS 4603.

Seismic_Restraint_of_Storage_Water_Heaters

If you are getting a new cylinder installed, make sure that it comes with a seismic retraint kit!

Retrofitting a seismic restraint kit
If you already have your cylinder installed and are not looking to replace it anytime soon, it is possible to retrofit seismic restraints to your exisiting cylinder. However, this is more complicated than installing with a new cylinder, since access behind the cylinder is required. If this is something you would like to do, it is best to contact us to discuss the job.

Hot_water_cylinder_experience_is_key

Hot Water Cylinder Experience Is Key

We all want to get the best value for our dollar, so we try to get the best prices from suppliers whenever we can. Having said that, the best price doesn’t always give you the best deal. Lower prices may reflect low-quality goods and services which may not be the most cost effective option in the long run. So while price is important, a better gauge to use when choosing a supplier is experience.

This is especially important when you’re buying big-ticket items like your hot water cylinder. Only an experienced supplier will be able to help you choose the right product that will heat your home efficiently and economically. Here’s why

Hot_water_cylinder_experience_is_keyExperience means better quality

“The more you do, the better you get.”  If you’ve been doing the same thing for years, you tend to get better at it. Hot Water Cylinders NZ has been in the business for years now, and we’ve installed over 1,000 units in the last financial year alone. This makes us the hot water cylinder supplier and installer with the largest experience in New Zealand.

In all our years of operation, we have learned all the tricks of the trade and found the best systems that provide the best value for our clients. We know that what works for one household may not work for another, so we make sure to provide tailored solutions every time.

There is a right hot water heating system for every installation job. We design our systems based on clients’ individual hot water usage and budget. Our goal is to ensure efficiency and economy, regardless of the brand. We are not partial to one brand, because we know all brands have their own good qualities and features that may work for different types of home. We do endorse brands like Rinnai and Bosch, but only because we’ve already proven them to be reliable and effective. Still, we stock all kinds of hot water cylinder systems from different brands to give our clients a comprehensive selection.

Experience means better service

Customer satisfaction is the hallmark of our service. Our referrals and repeat business are the best testimony to the quality of our work, and we work really hard to ensure our clients only have good things to say about us.

Experience taught us that a strong relationship benefits both parties. So we’ve made it our commitment to build and sustain true partnerships with our clients, making every effort to deliver the best service possible.

Experience also means better value

Even with new hot water heating technologies entering the market, we are not quick to upsell our clients to the latest product if it’s not in their best interest. In fact, there is often no need to replace your hot water cylinder, unless it’s already too old or inefficient.

Since a heavy price tag does not equal quality, we don’t push sales on the most expensive system in our range. Nevertheless, our experience taught us that some of the most reliable hot water cylinders will cost a bit more than the average systems. So you might find that spending a bit more on a cylinder today will give you greater savings in the long run. We always advise our clients not to look solely at the price but to weigh out the features and functionalities among their options, in order to make a smarter decision.

Because we know the right strategies for all kinds of installation, we can help you avoid common mistakes that can be costly to repair. For instance, some new installers does not know how to size the cylinder correctly, which results in an inefficient system that costs more to run. With experienced hot water cylinder installers like us, you’ll have your steady supply of hot water running in no time! Our systems are built to last and come with comprehensive warranties for your peace of mind.

Experience means compliance and safety

As experienced installers, we are highly familiar with applicable codes and regulations. We have learned all the things that could possibly go wrong with a hot water cylinder installation, so rest assured we also know the ways to avoid them.

Our installers are certified plumbers and gasfitters with decades of combined experience. And our systems are all tested for safety.

Homeowners also have a role in ensuring the safety of their hot water cylinder. Although the unit will remain hidden in a utility closet or basement, it needs regular maintenance for safety purposes. We make sure to educate our clients about safe operation and upkeep, particularly of certain components such as the pressure relief valve, vents and the temperature control.

Experience means expert advice

If you can’t decide between a vented and unvented cylinder, solar hot water cylinder or gas-powered water heater system, we’ll explain everything you need to know without the complicated jargon. With us, you won’t be left in the dark. If you’re not yet familiar with your options, we will explain how each hot water heating system works, what type of fuel is best for specific hot water usage, how much they cost, and what the benefits and disadvantages are. We also educate our clients about heat-loss figures, reheat times and insulation to give them a better idea of how efficient hot water cylinders should work. We’ll guide you in choosing the most suitable system for your budget and heating needs, and make sure the system is future proof to give you maximum return on your investment.

At the onset of every project, we encourage our clients to voice out all their questions or concerns. We are always ready to give a straightforward answer. In our experience, problems sometimes arise due to non-communication, and these mistakes can blow the client’s budget out of proportion and also reflect badly on our service. To prevent this, we make sure our clients are well informed before they sign a contract with us.

Whether you are buying a new hot water cylinder or replacing your old unit, you may contact us us for unbiased advice or a no-obligation quote through these numbers: 0800 4 CYLINDERS or 0800 429 546.

Milky Tap Water: What Are the Causes and Solutions?

So you turn the tap for a glass of water, and you notice that the liquid coming out of it isn’t clear but milky. But then, after a few minutes, the milky water starts to clear up until the cloudiness is all gone.

milky_tap_water_causes_solutions

What could have caused the milky appearance, you might ask? Well, there are a number of possible reasons for this:

  1. Air bubbles

Milky water, also known as white water or cloudy water can be caused by air bubbles that get trapped in the pipes. When water-soluble gases such as oxygen, chlorine, hydrogen sulphide, carbon dioxide and others enter the mains supply, they create air locks or air pockets in the plumbing system. As these gases are carried along the pipes, they get dissolved in the water. When you open the hot water tap, the pressure is released and the dissolved gases spurt out into millions of tiny air bubbles. This is what gives your hot water the white, milky appearance.

All main supplies contain a small amount of air, but a tear or damage in the pipe may pull in additional air. A change in the water pressure may also be to blame. An increase in pressure causes excessive air to get trapped in the pipeline. This can happen if:

  • Your home’s plumbing system and heater use the well system.
  • There is disturbance in the water distribution pipes, such as when utility companies switch from one well source to another.

milky_tap_water

Milky water is also common when the weather is cold. As water passes through the pipes in your home, it is mixed with oxygen. When it’s cold outside, more oxygen bubbles get into the water, hence the cloudy water effect.

If the water is left to stand for several minutes, the dissolved gases will start to separate and the cloudy effect will go away. This reaction is very much similar when you pour carbonated drinks into a glass.

  1. Your water heater’s anode

If water from your hot tap is excessively cloudy and generally stays that way, the issue may be with your water heater itself.

The anode rod (factory installed) in your hot water cylinder is there to inhibit rust by maintaining an invisible film of free hydrogen on the entire surface of the heater. The anode is placed where rust initially forms – in the water tank. It acts as “sacrificial metals” which draw the metallic ions in the cathodic area and keep them from going into the solution, protecting the tank against corrosion. This is most common in water heaters that are less than one year old. It disappears over time.

When water from ALL of your hot water taps turns milky, it could be a sign that your anode needs replacement. The good news is replacing an old anode rod is relatively easy and inexpensive.

  1. Sediments

Sediments such as sand, dirt and tiny particles from rocks in the ground can get into your water supply. This can happen when there are drilling activities nearby.

It’s easy to tell whether the milky appearance of your hot water is caused by air bubbles or by tiny particles. Wait for the water to clear up and watch. Air bubbles tend to rise to the water’s surface, while sediments tend to sink into the bottom or do not clear at all.

Like air bubbles, the presence of particles in the water does not make it harmful but aesthetically unpleasant.

  1. Methane Gas

It’s highly uncommon but not impossible. This problem can occur in areas where gas and oil wells are nearby. Methane is a flammable gas, so having it in your water source can pose problems. It is hard to detect since it is odourless unless the water also contains hydrogen sulphide. In addition, methane acts the same way as air bubbles –they also rise to the water surface and escape into the open air.

The usual fix for water containing methane gas is installing an aerated tap, which permits the gas to dissipate faster. The aerator must be vented to the open air to prevent the risk of fire or explosion.

Is the water safe to consume?

You may notice a difference in the smell, taste and overall aesthetic of your water. But as off-putting as milky water may look, it is completely harmless and safe to drink or use.

However, please note that cloudy appearance that is another colour other than white (i.e. brown, yellow or green) can indicate presence of bacteria, metals, minerals or other contaminants. This is often the case when the cloudy water effect does not clear up after some time. Cloudy water of this kind may have adverse health effects when consumed.

What can you do?

If water from all of your home’s taps appears cloudy, the problem could be from a pressurised water system. If only a single tap produces cloudy water, then the issue is with that fixture alone. Cloudy water from a hot tap can be an indication of a problem with your water heater.

Milky water caused by air bubbles or dissolved gasses can be resolved with aerated taps. Sometimes it cannot be fixed entirely, but aerating the water significantly reduces bubbles.

The cloudy water effect should not last longer than 24 hours. If the milky appearance of your hot water bothers you, you can:

  • Keep the taps running until your water runs clear.
  • Check with your neighbours to find out whether they are having the same issue. If such is the case, it is advisable to notify your water supplier of the problem.

If the situation doesn’t clear up itself, it is advisable to call in Hot Water Cylinders NZ to check whether things look normal or you need to take further steps.

We will come and take a look, so we can determine the right reasons and provide appropriate solutions. Contact us on 0800 832 638!

Rinnai_discontinues_ducted_iheat_range

Rinnai Discontinues the iHeat Ducted Heating Range

Rinnai Corporation, the leading makers of tankless gas water heaters in New Zealand, announces the discontinuation of their iHeat central heating products dues to “cost increases of key internal components.”

Rinnai_discontinues_ducted_iheat_range

The Rinnai iHeat is a ducted heating system that uses hot water to warm and circulate air, providing fast central heating to the entire home. The system is designed to operate in conjunction with a Rinnai Infinity continuous flow water heater. It has been touted as a healthy central heating option as it maintains the air quality and reduces the likelihood of allergens entering the home. The iHeat system is defined by its discreet installation and high energy efficiency (up to 80 percent).

Despite its wide public reception and positive reviews, the Rinnai team has decided to stop its production as a result of their ongoing product rationalisation, citing the following reason:

“Cost increases of key internal components has made producing the iHeat uneconomical.”

iHeat products will remain on the market until the end of December this year, or until stocks have run out. Nevertheless, Rinnai reassures iHeat users that spare parts will remain available and all warranties for iHeat will be honoured over the long term.

An Alternative to iHeat

With the iHeat phased out, Rinnai offers an equally efficient and powerful central heating system: Brivis ducted heaters.

Brivis is the leading brand of gas ducted central heating solutions in New Zealand, and has only been recently owned as a subsidiary of the Rinnai Corporation. The brand supplies a complete range of highly efficient ducted gas central heating products specifically designed for the NZ conditions.

“The addition of Brivis to the Rinnai range means that a more complete heating range is now available,” said the Rinnai team. “In most instances where an iHeat has been specified, Rinnai can supply an equivalent Brivis central heating solution.”

Brivis heaters may not have some of the “smarts” found in the iHeat, but their performance is highly comparable. They are also extremely efficient, with the range offering 6-Star rated systems such as the StarPro 6.

Some of the noteworthy features of Brivis ducted heating systems include:

  • Up to 16 fan speed settings that better match air volume and flow to your home
  • Zero ChillTM soft fan that prevents cold drafts on start-up
  • Automatic gas modulator that maintains the temperature level using a minimal amount of energy. You can set your home to a comfortable temperature and leave the system to keep it steadily heated at that level.
  • Ability to create up to four distinct zones
  • Ability to set the system to automatically turn on/off so you come home to a warm house or limit heating when not needed
  • Simple and easy to use programmable controller with both manual and auto modes
  • Compact, splittable and weatherproof units that ensure ease of installation.

More information on the Brivis range can be found at brivis.co.nz. To enquire about an installation, please contact our home heating specialists on 0800 4 CYLINDERS or 0800 429 546.

Rinnai Discontinues INFINITY Composite Recess Box

Rinnai Corporation, leading manufacturer of tankless gas water heaters, announces the discontinuation of its INFINITY™ composite recess box (R1406).

The composite recess box was introduced as an affordable alternative to the metal recess box designed for housing some units from the INFINITY™ range. Composite products are known for being incredibly strong and corrosion resistant, making them perfect for external applications. Despite this, the Rinnai NZ team explains that demand for the composite recess box is low, hence their decision for its discontinuation.

Meanwhile, the metal recess box will continue to be available.

INFINITYTM Metal Recess Box

The Rinnai metal recess box allows you to virtually hide your INFINITYTM unit, pipe work and power supply into a cavity, ensuring a smooth and neat finish to the job.

It allows a continuous flow gas water heater to be partially or fully recessed into an external wall, unlike the composite recess box which can only be semi recessed. The composite recess box is also not suitable for fire rated walls. These are probably why the metal recess box proved to be a more popular option.

Constructed of folded galvanised steel and powder coated white, the metal recess box can easily be painted to match or complement the exterior cladding. It is suitable for the following external Rinnai INFINITY gas water heaters:

rinnai_composite_recess_box_discontinuedR1405 recess box:

  • A-Series: A16-A26 (current range)
  • VT16-VT26 (discontinued)
  • XR16-XR26 (discontinued)
  • V16-V24 (discontinued)

R1407 recess box:

  • EF24 (current model)
  • HD200 (current model)
  • HD250 (current model)
  • XR32 (discontinued)

Installing a metal recess box

The INFINITYTM metal recess box is ideal for new builds or major renovations as it needs to be installed during the framing stage, i.e. before the internal linings, claddings or building wrap are applied.

The Rinnai continuous flow gas water heaters are designed for external installation, and thus your metal recess box must be located in an above ground, open-air situation. The area must have natural ventilation, where flue gases are safely expelled and rapidly dispersed by wind and natural convection.

Generally, it can be mounted on any vertical structure with water and gas connections and enough clearance for the pipe work. You can install it on an outside wall below eaves, balconies and other areas, but you might want to reconsider siting it near bedrooms since water heaters inside a recess box operates at a slightly louder level than units located externally. In most cases, the metal recess box is better located near the kitchen where there is a high demand for instant hot water.

In addition to general clearances, you need to consider your local building codes regarding this type of installation. To make sure your INFINITYTM water heater is compliant and installed properly, consult a licensed gasfitter familiar with the system prior to installation.

For Rinnai installation advice and consultation, you may call us at 0800 TEAM EURO. For more information about the Rinnai metal recess box and gas water heaters, click here.

When Pressure Relief Valves Leak And What To Do

Recently there have been several claims against ‘leaking’ TPR valves. Upon testing it has been found that the relief valve is neither passing nor failing to reseat, the ‘leak’ appears to be water passing out of the blow-out cage which has opened when the easing lever has been operated too quickly during maintenance.

THE EASING LEVER SHOULD BE OPERATED SLOWLY

The purpose of the blow-out cage is to act as a ‘back-up’ relief valve which may (in certain circumstances) open when a high flow rate is passing through the TPR valve during emergency relief conditions and is normal.

Incorrectly sized or partially blocked relief drains causing back pressure may also cause the blow-out cage to activate again releasing water at the cylinder. The relief pressure of the blow-out cage is roughly 50% of the pressure rating of the TPR valve.

This new plastic device is manually resettable as opposed to the previous model which had a ‘one shot’ non-resettable metallic mechanism.

To reset the blow-out mechanism please follow the instructions belo

  1. (Fig 1) Once the water flow has ceased to turn the blow-out cage anti-clockwise to remove the device from the TPR valve body.
  2. (Fig 2) Push the valve stem back through the cage until both the stem and the washer are completely removed from the cage (a resonable amount of force will be required to push the bevelled end of the shaft through cage, lubricating oil will prevent the rubber washer from being pinched).
  3. (Fig 3) Fit the washer onto the stem and insert fully into the cage until the bevelled end ‘clicks’ back into position.
  4. (Fig 4) Fit the device into the TPR valve body and SLOWLY re-test the valve.

leaking_tpr_valves

One thing to note is that sometimes there may be a case where the valve can be genuinely faulty. Depending on age the valve may or may not be under warranty. In such cases, give us a call to book an inspection in.

Product Review: Paloma External Gas Water Heater

Gas water heaters are becoming a more and more popular option as time goes. They provide endless instantaneous hot water without the need for a storage tank, and prove to be more energy efficient than a traditional electric water heater.

If you are looking at upgrading to a gas water heater, Paloma water heaters are an excellent option. Established in 1911, based in Nagoya, Japan, Paloma is one of the world’s largest manufacturers of gas appliances and offer an excellent solution to your water heating needs in New Zealand.

THE PALOMA EXTERNAL GAS WATER HEATER

The Paloma external gas water heater systems are compact, stylish and inconspicuous systems made to provide efficient water heating. They are designed to take up the minimal required space outdoors, resulting in minimal impact on your home and surrounds. Loaded with features to ensure efficient water heating, Paloma gas water heaters compete with the best and provide an excellent alternative to electric water heaters, with 6 star energy efficiency, instant heat at the touch of a button, precise temperature control and an endless supply of hot water for your home.

paloma_continuous_flow_external_gas_water_heaterKey features and benefits:

  • Available in 16L, 24L and 27L options
  • Hot water circulating system compatible
  • Over heat limit switch
  • Water pressure relief valves
  • Flamesafe over-heat protection system
  • Flame failure device
  • Digital diagnostic display
  • Q function
  • Error code recall
  • LPG or NG models available

Specifications

Recommended Outlets: 1-3
Litres: 16-27L
Size: 520H x 350W x 163D – 651H x 331W x 254D (mm)
Weight: 21-26Kg
Output: 27.9 kW – 40.0 kW

CONCLUSION

Gas water heaters add value to your property and reduce running costs, and the Paloma is an excellent option if you want to convert to gas. Gas water heating is becoming highly desired both for the lifestyle and cost savings provided to us here in NZ. If you would like to upgrade to a Paloma gas water heater, talk to us today!

hot_water_cylinder_stolen

How Water Cylinder Theft And How To Prevent It

Did you know that hot water cylinders are a target of theft? To most people, the thought of someone stealing your hot water cylinder would be ludicrous. But it is no joke, and hot water cylinder thefts continue to rise.

hot_water_cylinder_stolenCylinder Thefts And The Resulting Problems
The main target of hot water cylinder thefts are older low pressure hot water cylinder units which contain a large amount of copper. Copper fetches a significant price over metals like steel at scrap metal merchants, as high as $7.40 per kg, which means a 180L cylinder could be worth as much as $74, placing these cylinders containing copper at the top of the list for thieves.

However, the theft of the cylinder is not the only problem. When these thefts occur, the thieves are not exactly overly concerned about what state the property is left in, and as such usually take the quickest route to removing the cylinder which involves quickly sawing or ripping pipes, letting the cylinder drain onto the floor and then removing the cylinder by force. This causes a substantial amount of damage, not only to the pipework and the area surrounding the cylinder, but extending into the rest of the house due to the flooding.

Primary targets have been older homes which are under renovation or construction and are easier to access, not occupied and are likely to have an old cylinder about. Boarded up unused houses and houses which look to have been unoccupied for a while (such as when the occupants go on holiday) are also common targets.

However, due to these thefts, it is required by law to produce ID when selling scrap metal to a metal dealer. This makes it more difficult for thieves to sell the scrap once they’ve taken it, and acts as a deterrent to minimise the amount of theft that is happening.

How To Protect Yourself
There are steps you can take to minimise the risk of your hot water cylinder being targeted by thieves. One of the best steps you can take is to make your property look occupied, even if you are going away. This could involve having a friend clear out your letterbox regularly, leaving an old car parked in the driveway or leaving a light or two on to seem like someone is home. Thieves usually target vacant homes when going for cylinders, so if it looks like someone is home it will minimise the chance that they will try your home. Always have a friend or family member check on your home regularly to ensure it is secure while you are away.

Other measures you can take include making sure your cylinder is securely strapped into its installed position. This makes removal much more difficult, and is likely to put off opportunists. For home owners with instantaneous gas water heating units installed outside, there are brackets and cages which you can install on the unit to make removal next to impossible.

Luckily, modern mains pressure hot water cylinders are usually either stainless steel or enamel, which makes them much less of a target for theft than the older low pressure copper cylinders. While this does not guarantee that your home won’t be targeted, it certainly means that the reward is far smaller and will make the break in much less worthwhile.

Always Report Theft
If you have been a victim of theft, it is always important to report it to the police, even if you believe the damage is insignificant or you believe that they won’t be able to help. Reporting crimes helps to paint a bigger picture, allowing the police to see how prevalent the problem actually is and treat it as a priority. It can lead to an investigation which could result in the apprehension of the culprit. It will also help with insurance claims, as a police report can help with the process of filing a claim.

If you would like assistance in securing your water heater or have questions about how you can prevent theft from your property, contact us today.

rinnai_hotflo_heat_pump

Product Review: Rinnai Hotflo Hot Water Heat Pump

Have you considered heating your water with a heat pump? Heat pump water heaters are becoming increasingly popular with home owners looking for more efficient methods of water heating.

How do they work and what are the benefits?
Heat pump water heaters work like fridges in reverse, using electricity to move heat from one place to another instead of generating the heat. They can be up to three times for efficient than a conventional electric hot water cylinder. To move the heat, heat pump water heaters pull heat from the surrounding air and dump it at higher temperature into a tank to heat the water.

rinnai_hotflo_heat_pumpTHE RINNAI HOTFLO HEAT PUMP WATER HEATER

The Rinnai Hotflo Hot Water Heat Pump was designed for homeowners who want to significantly reduce running costs while minimising their carbon footprint. Rinnai state that the Hotflo heat pumps offer an energy consumption profile similar to solar water heating systems and can generate up to 700 liters of hot water per day. Under normal operating conditions, the Hotflo will will around 66% electricity than a typical electric hot water cylinder.

Key benefits and features:

  • Retrofits to virtually any brand of electric hot water cylinder
  • Simple installation, usually takes less than one day
  • Carbon footprint reduction with reduced energy consumption

Specifications

Rated input 1.9 kW
Max. energy output 6.0 kW
This is the maximum possible from the unit and should be used to ensure the tank TPR valve is suitably sized.
Max. water pressure 850 kPa
Refrigerant type/mass R134A/750 g
Refrigerant pressure High 2.7 MPa, Low 1.0 MPa
Refrigerant compressor oil Type: Neo 32, quantity: 520 ml
Ingress protection IP24
Noise level Fan approx. 55 dB(A)
Net weight 60 kg
Power supply 240 V, 50 Hz

Ambient temperature operating range
Operating temperature range is -7 to 45 °C. When the ambient temperature is below 2 °C the tank temperature achieved may be lower. When the ambient temperature is high, the air supply fan will run at a lower speed.

Start up protection
When the power is first turned on to the heat pump, or when the power is cut, then retsored, the unit will not start for three minutes. This is to protect the condenser.

Defrosting function
The heat pump has protection systems that will stop the operation of the unit if; the air inlet/outlet is blocked, voltage is out of nominal range (207-255 V), over pressure, or over temperature in the refrigerant system.

CONS OF THIS PRODUCT

Despite being very efficient, the best heat pump units will be more costly than an electric water heater and are more likely to have failures than electric water heaters. Installation will also be trickier, as they need a supply of warm air to be able to run effectively. This can be a disadvantage during the winter and in colder places.

Indoor Installation
Installation indoors could be challenging due to how these heat pump systems work. Because the heat pump uses the air around it, and exhausts cold air, it will be increasing more difficult for it to extract heat from the same cold air it has extracted. This wastes power and extends the running time of the heat pump, making it less efficient. If using a split system, you will want to heat pump installed outside and the tank inside, which will work well.

Repair Costs
It is common to be facing repairs soon into the life of a heat pump system, usually once the warranty has expired.

Noise
Heat pumps do make a humming sound similar to an air conditioner while operating. This could cause disruption depending on placement and how sensitive to sound the occupants of the house are, so this should be taken into account when deciding where to install the unit.

CONCLUSION

Heat pump water heaters are a good option for high hot water users who want to improve the efficiency and performance of their water heating system. They provide a fast ROI, being up to three times more efficient than electric water heating systems. The Rinnai Hotflo Hot Water Heat Pump is a top of the range choice if you want to go the heat pump route, providing you with efficient water heating and hot water on standby.

For more information on the Rinnai Hotflo Heat Pump, download this PDF.
pdfRinnai Hotflo Heat Pump Water Heater PDF

 

rinnai_smart_cylinder_180L

Product Review: Rinnai Smart Cylinder 180L Stainless Steel

All creature comforts can be made “smart” these days, from TVs to washing machines and now even our heaters. And what difference do they make! Not only do they allow us to make better use of our time, but they also help us trim down our household bills.

rinnai_smart_cylinder_180LThe 180L Rinnai Smart Cylinder is one such modern-day wonder. You wouldn’t think a hot water cylinder could save you cash, but this one promises just that! To be more precise, the Rinnai Smart Cylinder promises to shave up to 10% off your water heating costs. That’s a huge savings considering the fact that hot water heating accounts for around 30% of the average household energy bill.

It’s called smart for a reason: its thermostat learns your household’s hot water usage behaviour so it only heats water when it’s actually needed. This is unlike traditional electric hot water cylinders, which heats water round the clock.

In theory, it’s a total game changer. But does it deliver? Let’s take a closer look at its features, benefits and performance.

PRODUCT INFORMATION

The Rinnai Smart Cylinder is suitable for residential indoor water heating applications with mains and low pressure systems. It has triple inlets that make installation easy, and a curved element design that ensures 98% of water is heated.

Product name: Rinnai Smart Cylinder Low-Medium Pressure
Construction: High grade duplex stainless steel tan
Product diameter/height: 488/1660
Capacity: 180L
Connections: Hot and cold water connections ¾” (20mm)
Element: 3kW Incoloy 825 alloy sheath element positioned at the bottom of the tank
Max. working pressure: 120 kPa
Thermostat: Cothern iQuaflex 14 A probe thermostat
Cylinder recovery time: 3 hrs 9 mins (3kW) Based on a thermostat temp.setting of 60 °C and an incoming water temp. of 15 °C
Warranty: 10 years

The smart cylinder features an easy-to-use LCD control pad where you can access its three modes:

  • iQ Automatic Mode – This smart leaning mode enables the cylinder to learn a week’s worth of hot water usage in the home, which then sets a savings algorithm that automatically adjust the cylinder heating times according to your hot water usage pattern. Hot water usage habits are constantly monitored, so the saving algorithm is always updated according to anticipated demand. This means you always have a certain amount of hot water at all times depending on the level you select.
  • Vacation Mode – A hot bath is always a nice way to shake off the stress and aches of traveling. Traditionally, you’ll have to wait for your water heater to heat up nicely before you could take that much-needed relaxing shower. But with the Rinnai Smart Cylinder, you can have hot water as soon as you enter the door.

You simply set it to vacation mode, select the number of days you will be away for and the cylinder takes care of the rest. It keeps the water at a minimum temperature (6°C) while you are away to save power and keep the water from freezing in colder areas. After the specified period, the cylinder automatically reverts back to the operating mode you have selected before vacation was set.

  • Manual Mode – This mode operates the Rinnai Smart Cylinder as a traditional electric hot water cylinder. It’s most useful when you are having guests over. You simply set it using the mode button to make sure water is permanently maintained at a temperature.

NOTEWORTHY FEATURES

There are few other things that make the Rinnai Smart Cylinder a great option for hot water cylinder for your home.

rinnai_smart_cylinder_180L_features

  • A water level indicator
    Just above the shower symbol, there are visual levels that show the estimated amount of hot water available (occurs in iQ mode). The default setting (level 3) achieves energy savings whilst it ensures you have enough hot water available.
  • Maintenance/error indicator

This features makes troubleshooting easy. If something is wrong with the cylinder, an error code is indicated by the maintenance logo, the error code number and a flashing background light.

  • Child lock
    Prevent unwanted access to the control pad to keep the whole family safe.
  • Biosafe operation

The Rinnai Smart Cylinder meets the New Zealand Building Code requirement to disinfect water for legionella bacteria. To ensure water safety, the system performs heating above 60 °C whenever it detects risk conditions (<60 °C for 21 days).

CONS

The Rinnai Smart Cylinder is ideal for households that have a consistent pattern of hot water use. Otherwise, its iQ mode will not be accurate and will provide little advantage in terms of cost savings.

The smart cylinder doesn’t work for an open loop solar or hot water heat pump system, and it’s strictly for indoor use. You can’t use it as a pool or spa heater.

The Verdict

The Rinnai Smart Cylinder is a reliable appliance all in all. It does its job well and even saves you money. Its smart features offer benefits that are well worth the upgrade from gas, if you’re ever considering it.