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Tankless Hot Water Heaters, Efficient, Effective, Endless.
Posts tagged GPM
Takagi T-H1 – $2575 Tankless
Mar 10th
T-H1 – $2575.00
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The Takagi T-H1 is a condensing tankless water heater, meaning that it is 95% efficient and qualifies for the full 750$ in government rebates (if you have completed the home energy audit).
Significant benefits of this unit are:
T-K3-SP – $1195.00
Mar 10th
T-K3-SP – $1195.00
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The T-K3-SP is perfect for smaller homes or cottages. This unit can easily run 1-2 bathroom houses. With the cold ground temperatures in southern Ontario you can expect about 2.5 to 3.5 GPM and upwards of 7GPM in the summer. This Takagi is an exceptional price for such a low cost. Homeowners should expect between 82 and 85 percent efficiency for this unit on natural gas. Should you choose to go ahead with an energy audit you will receive a governmental rebate of 630$.
Pictures and Further Specifications to come.
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.)
Tankless Opperational Differences
Dec 2nd
Tankless vs. Tanks: What Are The Differences?
Tanks and Tankless units have operational differences you need to be aware of.
Typically, you can expect to use approximately 70% of a tank’s volume; i.e., a 50-gallon tank should provide approximately 35 gallons of hot water. The burner initiates to reheat the tank, but the latter can only recover at approximately 1 GPM. Thus, the recovery wait begins. This stored volume, in combination with the standing pilot light, usually results in an Energy Factor (EF) in the low range of 0.53 ~ 0.62 for gas fired, tank-type water heaters. “Energy factor is what the end user pays for. A water heater with an energy factor of 0.62 means that for every dollar spent heating water, $0.62 is being used to heat the water. The remaining $0.38 is wasted.”
Whatever the maximum flow rate for any Tankless unit that flow is continuous for as long as there is demand. And unlike a tank-type heater, the temperature remains constant at the selected set point. There is no stored water and no pilot light, so Tankless systems have a high EF range between 0.81 and 0.94, depending on the model and gas type.
