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| Heating
For Your Home |
Why
Do I Need a Load Calculation?
When purchasing a new system, it’s very important that a licensed dealer
visit your home to perform a complete evaluation, or “load calculation.” By
doing this, he will look at all the factors that affect the heat gain and loss
of your home.
The dealer will take into account the climate you live in, as well as the size,
shape, and orientation of your home; it’s not enough to merely calculate
square footage, although he will do that, too. What type of insulation and how
much you have is important along with window size, type, quantity, and the directions
they face. He might measure walls and floors; he’ll see what materials
the house is made of. He’ll check seals, estimate air leakage, and locate
existing vents and ductwork.
By combining these and other factors, the dealer will evaluate what size unit
your home requires. However, if you are replacing an existing system, you can
give your dealer a starting point. You can provide to him the model and serial
numbers of your existing units, found on the rating plate. (See Diagram)
But you will still require a load calculation. An over or under sized unit is
one of the most common problems with any system; when a licensed dealer performs
a load calculation, you will have a more efficient system and a more comfortable
home. |
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