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Tankless Hot Water Heaters, Efficient, Effective, Endless.
Posts tagged vent
Navien Condensing Tankless 98%
Apr 22nd
Navien Condensing Tankless 98%
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Navian tankless water heaters are rated at up to 98% efficiency; this is achieved through a process called 
condensing. This is the highest rated condensing tankless available on the market today. As a result if the Navian’s high efficiency an average house can expect to save about 40$ additional over a conventional non condensing tankless Water heater. Compare it to a conventional tank type water heater and you could potentially save more than 160$. Efficiency is the key for the future, we need to get more out of what we now have less of. 98% of the energy used in this Navian unit actually works to heat water and is not just blown out the exhaust vent. The chart should help to determine what size of Navien tankless water heater you might need to meet your home/familys domestic hot water needs.
Navian has now moved to dual stainless steel heat exchanges in its tankless water heaters, they claim that this material offers 20 times more corrosion resistance and increased condensation damage. The Navien Tankless water heaters are also employing a new air pressure sensor that senses incoming and oxygen and can compensate for long vent runs to maximize efficiency in the combustion chamber.
Navien has also updated their website so check it out here. Visit Navien’s Website
Get a Free Consultation on a Navien for Your Home – Call Toll Free 1-855-
Tankless Installation Time
Apr 8th
Installing a Tankless
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How long is it going to take to install a new tankless water heater?
There really isn’t a simple time frame that can be stated because no two installs are the same. Everyone’s home is unique and this means that install times are different for every home. If you have a tankless system and are replacing it (far and few between) the tankless install will be relatively quick as most of the pipes and the gas line will be the right vicinity.
If you are moving from a conventional hot water tank to a tankless water heater then it will take at least a few hours. These are a few of the required tasks of an install crew
This is a very short rundown of the installation process, it is much more detailed and requires more time than you might expect. All tankless water heaters have very specific details as to where and how they are vented. This does place a bit more work on the installer as they have to ensure that their installation meets all codes.
All and all a new tankless installation will run anywhere from a few hours to an entire day. For the majority of situations it is rare for a tankless to take more than half of a day to install. So I would suggest to budget about 4 hours for the installers to finish their work.
Rinnai Installation Diagram
Feb 11th
Rinnai Installation Diagram |
If you decide that a tankless water heater is a good idea for your home you should consider the requirements that your house will need to meet first. Tankless systems have a number of additional needs over your conventional tank water heater. We install more Rinnai than any other system so I will give the specifications for this system, although they are all quite similar.
A 3 FT clearance is required for the following:
- a. Windows
- b. Any exhaust outlets – Furnace, dryer vent, kitchen vent etc.
- c. Gas Meter – The vent needs to be at least 3 feet from the gas meter and the pressure relief valve.
The vent also needs to be 1 foot above grade and cannot be vented into any shared walkway that is less than 5 feet wide.
This diagram should help explain it.
Or get a Free in home consultation and have an installer who really knows “the tricks of the trade” help you find a spot for your Rinnai Tankless water heater. And as we all know installation can be tricky in Canada with existing gas codes and venting requirements. Get a Quote here
Rinnai R85 Tankless Water Heater
Jan 26th
Rinnai R85 Specs
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Tankless Specs
Specifications
Hot water capacity - Minimum flow – 0.5 gpm (gallons per minute)
- Maximum flow – 5.3 gpm
Anticipated maximum – at 75°F temperature rise (input 45°, output 120°) 4.2 gpm
There should be no single water fixture requiring more than 3.5 gpm
Sized right for our Ontario climate
Input BTU rating: Minimum 15,000 Maximum 180,000
Efficiency rating: 82%
Installation requirements
• Water lines – minimum ¾” required (inlet & outlet) – R-Ready Valve Set included
• Gas lines – sized for 180,000 BTU rating (3/4” minimum, larger with long runs)
• Gas pressure – minimum 6” W.C. (watch low pressure areas)
• Water pressure – target 30 – 80 psi (minimum 15 psi, maximum 150 psi)
• No anti-scald mixing valve required (check with your local municipality)
• Venting – 5” concentric venting (proprietary to Rinnai)
• Outside wall location is recommended – Standard Vent Kit included
Application guidelines
Hard water areas
• Unit is approved for use in areas where the water hardness is less than 12 grains
• Typically, GTA, Ottawa and Niagara municipal water sources qualify
• North (Barrie) and southwestern Ontario likely not eligible
• For hard water areas above 12 grains, please discuss with installation crew. A water softener may be required.
Configuration
• No re- circulating systems permitted (holding tanks, plumbing re-circ, etc.)
Frequently Asked Questions
Jan 20th
A Few FAQ
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Can a home owner install a tankless hot water heater?
We would not recommend a home owner to install their own tankless hot water heater. Tankless water 
heaters have strict venting codes that really need to be installed by a professional H.V.A.C company with certified technicians. Most of these units require direct (through the wall) venting with clearance regulations. Unit efficiency can greatly be decreased by insufficient/improper venting. With on demand gas units, gas piping and water pipes may need to be upgraded as well.
Should I buy my tankless hot water heater, then call an installer?
If you decide to purchase a hot water heater from a source other than your installer, you may be faced with warranty issues. Also, all required parts for a full installation, sufficient venting, pipe upgrading and safeties are not usually included when purchasing a unit. Most installers insist on supplying dealer brand units with their installations. This will benefit you, the homeowner, as installers are specifically trained for the brand they install and if required, there will be no warranty issues with parts under manufacturers’ warranty.
Venting a Tankless
Jan 14th
Tankless Venting
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There is a plethora of information regarding tankless systems and which is right for you. This can be an intimidating experience for any consumer, today we are going to deal with venting and choosing the right method for your application. There really is no right or wrong choice it’s that some situations will require different methods and we aim to help you choose the option that best suits your needs.
Use the information below to the best of your ability, but if you have a unique situation send us a quick email or give us a call and we would be more than happy to help out.
Tankless systems require oxygen or air to complete and maintain the combustion process. It is essential for tankless water heaters to precisely monitor and control both the incoming and exhaust gases to achieve peak efficiency. As time goes by natural and environmental occurrences build up reducing a tankless heaters ability to efficiently heat water. Different venting systems have different traits let’s look at some of the different characteristics.
Non Direct Vent Indoor (fan assisted)
- Uses a powered fan to push exhaust gases out of the house
- Pulls the air or oxygen needed from the inside of the house
- Fan powered tankless systems allow for increased flexibility in venting (vertical or horizontal)
Direct Vent Indoor (fan assisted)
- Combustion oxygen is taken from outside the home, eliminating thermal drafting issues inside.
- The Tankless water heater is sealed and doesn’t consume any air form the inside of the house.
- Venting is done with two pipes or a single concentric pipe (a pipe inside another pipe).
- Can be used in locations where appliances may be competing for the same oxygen or in cold climates where air leakage reduces home energy efficiency.
- Vertical or horizontal venting
Outdoor
- This is restricted to warm weather climates only as subzero temperatures significantly reduce efficiency and there is a risk of the unit freezing
- Air for combustion is taken directly from the environment around the unit.
- Improves home energy efficiency as excess heat is thrown off outside and reduced A/C load.
Takagi Tankless
Dec 10th
Takagi has been around since 1952 and has provided the tankless market with a number of firsts.
- Takagi is the First tankless water heater company specializing in tankless-only products to enter the 
North American market.
- Takagi is the First tankless water heater company to offer a tankless product (the T-H1) with an amazing thermal efficiency rating of up to 95%.
- Takagi is the First tankless water heater company to offer a “direct vent convertible” tankless model (the T-K3) which allows you to convert the unit to a direct vent unit.
Takagi is the First tankless water heater company to utilize the air-fuel ratio rod, a unique safety device.
Takagi has 10 tankless units to choose from, they range from small residential heaters that are capable of 3.0 gallons/minute to large industrial systems that are able to produce 7.9 gallons/minute. Of course most of their systems are smart link capable which doubles their output.
