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Tankless Hot Water Heaters, Efficient, Effective, Endless.
Posts tagged Tankless hot water heater
Navien Tankless Recall In Ontario – Poisoning Risk – Models and Model Number
Jan 5th
Navien tankless has issued a recall on thousands of tankless systems that have pose a risk of leaking carbon monoxide and poisoning homeowners.
Navien is located in South Korea and has been manufacturing it’s tankless water heater for several years now. There are a suspected 13,000 units with the defect and recalled. An unstable connection can cause the vent collar to separate or disconnect allowing exhaust and carbon monoxide to leak into the home.
Tankless water heaters are a green appliance that is able to heat water instantly saving consumers money and energy. A tankless eliminates the need to have a standing storage hot water tank that needs to be heated continuously.
The affected Navien tankless systems that are being recalled were sold to distributors from February 2008 to March 2009. They have been described as:
Navien tankless hot water heaters are white with “T-Creator” and “NAVIEN” on the front. Recalled model numbers are CR-180(A), CR-210(A), CR-240(A), CC-180(A), CC-210(A) and CC-240(A) manufactured in 2008. A label on the side of the water heater lists the model number along with the manufacturing year in YYYY format.
These units are installed indoors in basements and closets (typically in Canada and the northern US). The units that are installed outside are not affected and not being recalled.
If you discover you have one of these models you can schedule a free repair but should not use the water heater in the mean time. Navien also suggests that a carbon monoxide detector be installed outside the sleeping areas of homes.
For more information you can contact Navien at (800) 244-8202 between 8 a.m. and 5 p.m. PT Monday through Friday.
Takagi Condensing Tankless Review
Mar 16th
Takagi Condensing Tankless
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Here is the Takagi T-H2 Condensing Tankless hot water heater, there’s a lot to cover so lets get started.
Takagi Tankless Benefits
- PVC venting
- 95% efficient
- 4.6 GPM in dead of winter
- 8.5 GPM in the summer
- Direct vent capability
Info
The T-H2 model is available as a direct vent or an Outdoor model only. Takagi’s T-H2 “2nd Generation High Efficiency Tankless” unit, is a very energy efficient tankless unit (up to 95% in thermal efficiency) in the Tankless industry. The T-H2 was apparently designed for residential and light commercial use and offers Takagi’s Easy-Link to join multiple units.
The T-H2 can provide upwards of three showers’ worth of water simultaneously in colder climates.
The T-H2 can be vented with PVC, providing 0 clearance for DV installations. PVC venting can be used in all applications and apparently Takagi says that 3″ exhaust venting is now available (previously it required a 3″ intake and a 4″ exhaust).
The primary heat exchanger is made of “Heat Resistant Alloy” HRS35 Copper, Takagi has also added a “High Corrosion Resistant Stainless Steel” #316L secondary heat exchanger to recover waste heat from the vent stack before it leaves the unit to preheat the incoming ground water. This second heat exchanger and the resulting condensation that forms from the high efficiency operation, classify it as a “Condensing” Water Heater.
Download the official Takagi T-H2 Manual Here. Must have a PDF viewer.
Specifications
| Natural Gas Input | Min. 13,000BTU | Max. 199,000BTU |
| LPG Input | Min. 13,000BTU | Max. 199,000BTU |
| Gas Connection | 3/4″ NPT | |
| Water Connection | 3/4″ NPT | |
| Condensate Water Drain | 1/2″ NPT | |
| Natural Gas Pressure Inlet | Min. 5.0″WC | Max 10.5″WC |
| LP Gas Pressure Inlet | Min. 8.0″WC | Max. 14.0″WC |
| Weight | DV = 73lbs. | |
| Dimensions | 25.6″ x 18.5″ x 12.4″ | |
| Ignition | Electronic Ignition | |
| Electrical Supply | AC 120V (60 Hz) | |
| Water Pressure | Min. 15psi | Max. 150psi |
| T-H2DV Manifold Pressure | Natural: 3.15″WC | Propane:4.6″WC |
As we all know Canada can has winter, and this affects our ground water temperature. The higher the tankless has to heat ground water up the lower the output flow of hot water is. Ontario’s ground water fluctuates with the coldest temperatures occurring in February and the warmest is September. Toronto, Hamilton, Brampton, Scarborough, Mississauga for example are places that rarely see ground water temperatures dip below 40 degrees Fahrenheit. Thus its safe to assume a minimum of 4.6GPM in the worst of conditions.
Download the official Takagi T-H2 specifications sheet here. Must have PDF viewer.
Conclusion
If you are looking for a condensing tankless that is relatively cheap and flexible for installation the Takagi condensing unit is definitely one that you should consider. This unit is $2575 our price and the Suggested Retail is $3920, which is considerably more.
Fill out the form below if you are at all interested in this or any other Tankless Water Heater.
Cleaning your Tankless
Oct 13th
Cleaning Your Tankless
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We get a lot of questions regarding the cleaning procedures on a tankless water heater, we have come up with a thorough document for you to follow. This document is in PDF format so you will need a PDF reader (they are free). You can download the document here DOWNLOAD – Download instructions to clean a tankless water heater.
Here is a little excerpt taken from the document in step 5.
“When flushing is complete and before the lines are removed, verify that the purge port valves are closed and remain in this position. You can now remove the lines and reinstall the purge port valve caps, ensuring that the rubber washer is in the cap, and tighten. (NOTE: To prevent damage to the rubber sealing discs (washers), do not over tighten these caps.) ”
Remember that Ontario and even Toronto for that matter has quite varying degrees of water hardness, owners of Tankless systes should be aware their particular situations and develop a schedule that reduces the amount of buildup in their tankless hot water heaters.
How a Tankless Works
Oct 7th
Rinnai and Tankless Explanation
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This is a great video done by Rinnai that explains how a tankless hot water heater works compared to a conventional tank type heater.
Going Green with a Tankless
Jun 4th
The tankless setup is a much superior option than a traditional water heater system. Why? Consider a few of these reasons.
You have probably been downstairs in the basement and looked at the old hot water heater which appears as though it belongs in the dump. And you might be one of those people that used to believe that a tankless water system would not operate as well as the other kinds of tank heaters. You will be pleasantly surprised when you find out the various benefits of employing a tankless hot water heater.
So, the next time you look for a updated water heater for your house, consider putting in an on demand hot water unit. With the advantages considered in this article, you can understand why installing a tankless water heater is indeed more practical than using old units. Make sure that you compare prices and benefits of the varied types of water heaters before you make you final decision. Value oriented homeowners can begin their search on the Net. I guess that’s why you are here reading this now.
Send an Email if you have any questions, we would be happy to answer questions you have.
Tankless Rental Program
May 20th
Tankless Rentals
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Home owners in Ontario, Toronto, Burlington, Hamilton, Etobicoke and the GTA are now able to rent a tankless hot water heater instead of the conventional tank type. A tankless system heats water on demand 
or as required by a home owner and provides an endless supply. A conventional tank heats water all day long and wastes energy.
This is a worry free rental program that gives home owners the option to go tankless without the upfront costs. Switching out your old tank is easy as expert installers will remove the old tank and replace it with the new tankless system. The old tank will, if you own it be recycled or if it’s a rental returned to the company that you’re currently with.
This should all take less than 4 hours and you can be saving over a 1000 pounds of CO2 a year.
Fill out this quick form and we will have someone contact you within 24 hours to answer any question and find out if a tankless will work in your home.
Sizing a Tankless Hot Water Heater
May 6th
Sizing a Tankless Water Heater
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The largest difference between a tankless and a conventional tank type system is that, while a tank can 
supply a large amount of hot water for a short period, a tankless water heater provides a smaller amount limitlessly. Thus with a tank type water heater you can run all your taps and showers and have all the hot water you want…. Well until the tank runs dry, and that shouldn’t take long. With the tankless system you can open all the taps to the capacity of the tankless, and have hot water for as long as you want. Yet if the system was undersized or sees demand beyond its designed capacity, your water will only be lukewarm.
In fact that’s really about the only thing that can go wrong on a tankless water heater, and realistically its not even the fault of the heater. This usually occurs when customers don’t take the time to really understand how a tankless hot water system works. It’s also cause by people trying to get the best deal or cheaping out and having a dealer install a smaller unit.
A tankless water heater has a certain capacity that has to be carefully calibrated to make sure that it can handle the highest load that a house can produce. A smaller sized tank may be able to handle only a gallon of hot water a minute (about one shower). If you have a larger family or home that has multiple showers you will need a much larger system.
Any contractor trained in tankless hot water heater installation will be able to give your situation and home the best advice on which model to choose.
The Cold water Sandwich
Mar 23rd
What is the cold water sandwich?
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This sandwich happens when there is warm water for a few minutes then a burst of cold and then rapidly back to warm. This occurs in homes with tankless water heaters as the residual water in the pipes going to a faucet or shower can still be hot. The user in the household will then turn the tap on and feel warm water almost instantly. A tankless water heater takes a few seconds to heat up the heat exchanger and start 
transferring that heat to the water. The result is that a small amount of cold water can make it through the heat exchanger without warming up. When this cold water reaches the end user it may not even be noticed or if the person is in the shower it may be quite evident. After a second or two the heat exchanger is working and hot water is being produced and sent though the hot water pipes bring the desired water temperature again. This does occur more frequently in electric tankless water heaters over gas powered tankless systems. Gas is at full temperature almost immediately where an electric element can take a minute to fully reach its operating temperature.
Now you know what a hot water sandwich is in reference to plumbing and tankless hot water heaters, ask your contractor or installer as there are ways to mitigate this sandwich.
Solar and a Tankless
Feb 19th
Solar And A Tankless Heater
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There is starting to become a buzz around solar hot water systems. If you have a good, knowledgeable contractor a solar water system can work quite well with a tankless hot water heater. 
Here are a few of the advantages that you can expect when combining the two systems.
1. The preheated water coming from the solar water heating system will increase the flow of hot water out of a tankless unit. The reason is due to the fact the tankless has to heat pre-warmed water reducing the necessary temperature rise. The amount of hot water a tankless can provide depends on the input temperature. The greater the temperature rise necessary the slower the water can travel through the heat exchanger and the slower the output flow. Incoming water at 45F vs. 70F vs. 100F will have very different results on the output of a tankless system.
2. The water is already warm or even hot from the solar rays before entering the tankless unit and therefore the added wait time associated with a tankless unit can be reduced or even eliminated.
3. Its important when combining a tankless and solar water heater to consider a tankless unit that recognizes incoming temperature as well as outgoing and is able to fully modulate its burner (therefore only burning the necessary amount of gas to raise the temperature to the appropriate amount).
4. With the right tankless unit and an appropriately sized solar system you may find that your tankless rarely need to run. In fact some people have found that their gas bills are now costing only a few dollars as opposed to a few hundred dollars.
These Solar systems can be a little tricky in Ontario and Toronto as we have winter and the solar system (if it fails) could experience freezing. This would rupture the thermal cells in the collector rendering it ineffective. It may be necessary to use a glycol system to prevent freezing if electricity goes out. Your contractor should be able to provide all necessary info, or fill out the contact form and we can help.
