Ecotherm can calculate your needs for free |
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| Power calculation
is a very important step; it has to be precise so you purchase what
suits your needs. Vague calculation could lead to an oversize radiator
purchase, you would overpay unnecessarily or worse you would have
an insufficient radiator that would not provide the expected comfort. Ecotherm calculation method is very precise. Our advisers use all the following criteria: • General insulation level of the house • Exterior temperature • Interior temperature desired by the customer • Floor level (Basement, 1st Floor) • The volume to heat, not only the surface • The window surface Our advisors will be pleased to assist you, to calculate your needs (even on blueprints) and to give you an estimate. This is free with no obligation. Professional work guaranteed.
L = length, w = width, H = height, each dimension in foot. DT = Temperature difference between the one required in a room (example: +19 °C) and the average outdoor temperature on cold days (example: -20 °C). In this example the temperature difference is 39°C. G = insulation coefficient in watts / cubic foot. Example : A house built in the 80's in Montreal, insulation never renovated and regular window surface. The room to heat is on the 1st floor, its size is 12 feet length by 10 feet width by 8 feet height. The temperature desired is 20°C. Chart 1 indicates an outdoor temperature of -20.1°C. The temperature difference is 20 - (-20) = 40.1°C Chart 2 indicates a coefficient G of 0.027 for ground level. If it were in the basement, coefficient G would have been 0.018. Calculation is: 12' x 10' x 8' x 0.027 x 40.1°C = 1039 Watts You must select a 1100 Watts for this room. Chart 1 - Average temperatures on cold days: |
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Montreal
and its surrounding
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Temperature
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Regions
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Temperature
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Regions
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Temperature
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Brossard
(Longueuil)
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-20.4
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Chicoutimi
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-25.0
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Rivière-du-Loup
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-21.9
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Joliette
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-20.5
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Drummondville
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-22.9
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Sherbrooke
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-22.8
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Laval
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-19.6
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Gaspé
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-23.3
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Sorel
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-22.9
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Mont-Tremblant
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-24.0
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Granby
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-18.2
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St-Georges
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-21.4
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Salabery-de-Valleyfield
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-19.6
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Mont-Laurier
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-25.1
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Thetford
Mines
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-21.4
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St-Hyacinthe
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-18.2
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Montréal
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-20.1
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Trois-Rivières
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-22.5
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St-Jean-sur-Richelieu
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-21.3
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Ottawa
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-20.0
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Val
d'Or
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-28.6
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St-Jérôme
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-21.5
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Québec
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-22.4
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Victoriaville
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-21.4
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St-Sauveur
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-24.0
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Rimouski
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-21.1
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Chart 2 - Coefficients G:
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Very
good insulation
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Good
insulation
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Correct
insulation
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Low
insulation
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Ground
and up
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0.023
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0.027
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0.032
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0.060
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Basement
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0.015
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0.018
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0.021
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Very good insulation: for example a construction built after late 90's.
Good insulation: for example a construction built from 70's to 90's, or a construction built before the 70's with insulation well renovated.
Correct insulation: for example a construction built before the 70's.
Low insulation: for example a garage.
These calculations are provided to best inform the public, it doesn't engage in anyway Ecotherm in case of misapplication.
Ecotherm recommends you to choose a heater with a power above the result of your calculation.
If you have windows above average, add more power depending on how big your window surface is.