Sometimes you can trust a rule of thumb.
Sometimes you can’t.
There’s an old rule of thumb in the AC business which a lot of people still use. It confuses the heck out of customers and worse, causes them to spend hundreds if not thousands of dollars unnecessarily.
If you’re in the market for an AC system, chances are you’re going to be quoted a price based on the square footage of your home.
The rule of thumb most AC contractors will use is this:
Budget 1 ton of air conditioning capacity for each 500 square feet of conditioned floor area
And it’s DEAD wrong.
This rule of thumb doesn’t take into account a whole slew of critical factors.
The #1 most critical factor in sizing new AC systems is AIR FLOW, not square footage.
Other important factors which impact air flow include:
- Location of the house relative to the sun
- Size and number of windows
- Size of individual rooms
- Ceiling height
- The type of insulation
The correct way to estimate & quote an AC system
Here at Three Rivers, we use a scientific process for estimating new systems.
We start with taking measurements and observations for all of the items listed above.
We run Manual J calculations which give us the recommended heat load.
Then we look at Manual D which helps us calculate the optimal duct design.
At that point, we are ready to provide you with a recommendation for an optimized system for your home. One that will run efficiently, eliminate the hot spots in your home and keep you comfortable for years to come.
If someone else gives you anything short of that, don’t walk…RUN!
To schedule a free consultation contact us today.