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Posts tagged tankless water heater

Navien NR-240

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
At 35˚F Rise : 11 GPM
At 45˚F Rise : 8.6 GPM
At 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

Takagi-TH2S-tankless

Takagi T-H2S

The Takagi T-H2S is a new tankless model that Takagi has developed and is now offering. It is available in either Direct Vent or Outdoor models. Takagi’s T-H2S is a condensing tankless that is very energy efficient (up to 90% EF). The T-H2S was designed for residential applications and is a candidate for the ECOenergy audit rebate program and its $375 tankless rebate program.

The T-H2S Flow

Seeing as the T-H2S is one of Takagi’s greenest tankless models offering an average efficiency of 90% with natural gas and 90% with propane. If you choose this tankless model here in Ontario, Toronto, Barrie, or any of the surrounding cities expect a flow rate of about 4.1 GPM or 246 GPH with an input temperature at 40ºF or less.

Takagi states that the T-H2S tankless can provide at least two showers worth of water simultaneously in addition to one appliance.

Features

The T-H2S can be vented with PVC providing zero clearance for direct vent installations.
PVC venting can be used in all applications and a 3″ exhaust venting option is coming soon.
The TH2S utilizes dual exchangers to maximize the unit’s energy efficiency.
The primary heat exchanger is made of copper while the secondary is stainless steel.
This secondary heat exchanger is used to recover waste heat from the vent stack to preheat
the incoming ground water. This is in fact what classifies the TH2S as a condensing
tankless water heater.

Specifications

Natural Gas Input  Min. 13,000BTU   Max. 180,000BTU 
LPG Input  Min. 13,000BTU   Max. 180,000BTU 
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.   OS = 70lbs. 
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-H2S-DV Manifold Pressure  Natural: 2.5″WC   Propane:4.3″WC 
T-H2S-OS Manifold Pressure  Natural: 1.9″WC   Propane:3.6″WC 

Interested in a quote for a Takagi? They are always free, Get a Quote!

takagi-T-K3-tankless

Takagi T-K3

The T-K3 model is one of Takagi’s most versatile and powerful residential tankless water heaters. The T-K3 has Easy-Link capability, allowing owners to connect up to four units without the use of a controller unit. The TK3 can also be converted to a direct vent model to further extend its application in residential homes.

Features

This Takagi TK3 tankless has a number of features that allow it to stand out from the pack.

Compact Size: Only 13.8 inches wide, the T-K3 tankless has the ability to be recessed between wall studs for even more space savings.

Low Activation Flow Rate: The Takagi TK3 activates at only 0.5 GPM, which allows the use of smaller water flows in bathroom sinks and showers. This is a pretty standard flow rate now for new generation tankless water heaters.

Parallel Installation: Easy Link technology allows the T-K3 to be installed with up to three other units without the use of an additional control box.

Direct-Vent Conversion: The TK3 can easily use a direct vent conversion to import combustion air from outside.

Eight Temperature Settings: Some tankless manufactures have only 4 preset temperature settings, the T-K3 offers eight separate temperatures. However, if you want a specific temperature than it is required that you buy the TM-RE10 temperature controller.

Longer vent runs: The T-K3 can have a vent pipe run up to 50 feet with five elbows, instead of the normal 35 with three elbows. This can be a great addition if your particular installation has a long vent run.

Synopsis

The TK3 tankless incorporates a number of important features into one new tankless system, and should fit the needs of most high-volume residential applications. As always performance depends on the temperature of the ground water, and with winter water temperatures here in Ontario, Toronto and the Toronto region dipping to the low 40 degrees F range you can expect the T-K3 tankless to produce a flow rate around 4.1 GPM, or 246 GPH.

Specifications

Natural Gas Input  Min. 11,000 Btu   Max. 199,000 Btu 
LPG Input  Min. 11,000 Btu   Max. 199,000 Btu 
Gas Connection  3/4″    
Water Connection  3/4″    
Natural Gas Pressure Inlet  Min 5.0″ W.C.   Max 10.5″ W.C. 
LP Gas Pressure Inlet  8″ Min. W.C.   13.5″ Max. W.C. 
Weight  40 lbs   Electronic Ignition 
Dimensions  20.5″ X 13.8″ X 8.5″    
Ignition  Electronic Ignition    
Electrical Supply  AC 120 V    
Water Pressure  Min. 15 psi   Max. 150 psi 
Manifold Pressure  Natural 2.5   Propane 4.4