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Posts tagged heat exchangers

Navien NR-240

Jan 6th

Posted by administrator in [...]

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Navien NR-240 Tankless Water Heater Information

Navien NR-240
Input : 20,000~199,000 BTU/h
Thermal Efficiency : 98%
Energy Factor : 0.95
Flow Rate
ㆍAt 35˚F Rise : 11 GPM
ㆍAt 45˚F Rise : 8.6 GPM
ㆍAt 77˚F Rise : 5.5 GPM

Navien Offers Ultimate in Energy Efficiency with Hi-Tech Comfort

  1. Easy installation and PVC venting for Navien tankless
  2. 3″ SCH 40 solid PVC up to 100′
  3. Navien holds the industry’s highest energy efficiency rating – 98%
  4. Ready Link Cascade System
  5. Optional built-in recirculation system with buffer tank
  6. Advanced Eco Navien technology
  7. Extended lifecycle utilizing dual stainless steel heat exchangers
  8. Advanced remote control – NR-10DU
  9. Navien has the industry’s best warranty

Heat Exchanger

Navien tankless water heaters utilizes dual stainless steel heat exchangers, providing 3.8 to 4.5 times longer life-expectancy and erosion resistance over the copper heat exchangers used in other tankless brands. Navien’s heat exchangers operate with relatively low water temperature, minimizing damage from hard water conditions and maintains efficiency levels. Its always important to have your tankless flushed once every 2 years or so to remove any buildup from within the heat exchangers.

Efficiency

Because of Naviens high efficiency the tankless can be vented in PVC piping. Basically excess heat is exhausted with all the combustion gasses in conventional tank systems but a Navien uses this to further heat the water. This results in significantly lower exhaust temperatures and allows for the use of PVC exhaust vent piping.

Links and Further Info

Navien_condensing_tankless-water-temp

Navien Tankless NR180 NR210 NR240

Oct 19th

Posted by John in Navien Tankless

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With Navien Condensing Technology, you’re purchasing the most efficient home water heating system with “Ultra Condensing Efficiency”. Their systems offers substantial savings and produces less emmissions than a conventional water heater. Plus, the installation and venting processes are easy, cost effective, and Navien’s products are high in quality and performance.

The 3 primary Navien models

NR-180

NR-210

NR-240

These three are Natural gas systems, but you should note that they come in propane versions as well.  In fact as propane burns hotter than natural gas the propane versions are a bit more efficient.

Navien tankless water heaters utilizes dual stainless steel heat exchangers, providing a longer life-expectancy and more resistance to erosion than copper heat exchangers. All tankless systems are designed to be cleaned and de-scaled, improving life span and durability.

Hot Water Flow Chart.

This chart shows the corrected values for hotwater production of each Navien water heater in relation to ground water temperature.  Here in Ontario, Toronto, Mississauga, Hamilton, and the surrounding cities we should assume a ground water temperature of 35F.

 Intelligent Remote Control For the Navien Tankless

NR-10DU (Included with every Navien Tankless Water Heater)
. Temperature adjustment in 1¡ÆF increments between 98-120¡ÆF
. Touch activated backlight function
. Easy-to-Use button type control
. Built-in recirculation timer for water and energy savings
. Key-pad lock button prevents inadvertent temperature changes
. Advanced water heater diagnosis capability and error feedback

 Endless Hot Water Supply

Navien’s (and all tankless systems) offer an unlimited supply of hot water to meet a home’s unending demand
for hot water. With body showeres becoming much more common place now, it is imperative that you install a tankless.  These new shower systems can
run a conventional tank type water heater dry in very short period.

Navien Venting Benefits

The high effciency of Navien’s Condensing Tankless Water Heater results in lower exhaust
temperatures, allowing for the use of 3” PVC venting.
• PVC venting offers a significant cost savings when compared with other venting materials.
• PVC venting is lightweight and easily slides together, reducing installation time
and makes it easy to run long distances.

See the Full Navien Brochure

Debunking Some Common Tanklesss Beliefs

Oct 18th

Posted by administrator in INFO

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I have read a few articles lately regarding a number of beliefs, ideas, and thoughts on the benefits and opinions of tankless water heaters. I would like to take a few minutes here to verify and nullify some of them.

A tankless water heater will not save you money.

This depends so much on the situation it’s impossible to make any claim that a tankless will not save you money. Here are a few variables that factor in.

  1. The price of natural gas varies by Province, City, Country, and even supplier and on top of that there is delivery charges, taxes, and additional fees. A tankless can significantly influence these costs instigating either an increase or a decrease (more often than not its a decrease).
  2. The price of the tankless… this varies again with the size of unit, the brand etc etc. Also be careful of door to door conventional tank type water heater sales people, more often than not those contracts are much higher than the actual cost of a tankless.
  3. Tankless warranties are pretty similar to a conventional tank type water heater, but…. a tankless is designed to be serviced and have a lifespan of over 20 years. Their heat exchangers are designed to be cleaned of all calcification, whereas you tank type heater is simply designed to be replaced

    4. So take the what you hear about the advantages and disadvantages of a tankless with a grain of salt. If someone has decided it’s not for them and feels it important to rhyme off a few common misconceptions take the time to investigate and see if its right for your home.

Navien NR-180

Sep 20th

Posted by administrator in Installation Techniques

Navien NR-180 Tankless Water Heater Information

Navien NR-180
Input : 15,000~150,000 BTU/h
Thermal Efficiency : 98%
Energy Factor : 0.96
Flow Rate
ㆍAt 35˚F Rise : 8.3 GPM
ㆍAt 45˚F Rise : 6.5 GPM
ㆍAt 77˚F Rise : 3.8 GPM

Navien Offers Ultimate in Energy Efficiency with Hi-Tech Comfort

  1. Easy installation and PVC venting for Navien tankless
  2. 3″ SCH 40 solid PVC up to 100′
  3. Navien holds the industry’s highest energy efficiency rating – 98%
  4. Ready Link Cascade System
  5. Optional built-in recirculation system with buffer tank
  6. Advanced Eco Navien technology
  7. Extended lifecycle utilizing dual stainless steel heat exchangers
  8. Advanced remote control – NR-10DU
  9. Navien has the industry’s best warranty

Heat Exchanger

Navien tankless water heaters utilizes dual stainless steel heat exchangers, providing 3.8 to 4.5 times longer life-expectancy and erosion resistance over the copper heat exchangers used in other tankless brands. Navien’s heat exchangers operate with relatively low water temperature, minimizing damage from hard water conditions and maintains efficiency levels. Its always important to have your tankless flushed once every 2 years or so to remove any buildup from within the heat exchangers.

Efficiency

Because of Naviens high efficiency the tankless can be vented in PVC piping.  Basically excess heat is exhausted with all the combustion gasses in conventional tank systems but a Navien uses this to further heat the water. This results in significantly lower exhaust temperatures and allows for the use of PVC exhaust vent piping.

Links and Further Info

Norits Tankless Water Heater

Mar 22nd

Posted by administrator in General Info

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Norits Tankless Hot Water

We are now starting to install the Norits tankless systems to replace the Navien that we have had some troubles with. The Norits is a condensing tankless that is able to provide sufficient hot water for the typical 3 bedroom 3 bathroom home.

Nortis Advantages

  1. 0.5 GPM low flow start up requirement
  2. Direct ignition
  3. Condensing so
  4. Greater than 93% efficient
  5. Digital thermometer for accuracy
  6. Dual copper primary heat exchangers
  7. Multi-system compatibility
  8. PVC (636) venting capabilities

The Noritz 842 tankless water heater also uses a dual flame in its burner. This is a system that recirculates the exhaust gases back into the combustion chamber to burn off any excess fuel and particulate mater so as to increase efficiency and provide, essentially free heat.

Single Burner

Single Burner

Dual Burner

Dual Burner

These energy efficient models use dual heat exchangers to increase efficiency to over 93%.  Available form Norits are the N-0842MC and the N-0842MC-DV, the tankless come in either direct or power vent.

Fill out this form and see if the Norits tankless will work in your home.  CLICK FOR FORM

Noritz is correctly spelled with a Z instead of an S but its a common mistake.