Will you help me calculate the air conditioning unit I need regarding tonnage?
Asked by
JLeslie (
65990
)
2 months ago
Open room no walls. 40’X60’X12’. in Florida, heat is not important.
I tried to look it up and it isn’t making sense to me, and everything I see is based on a typical house I think not 12’ high ceilings.
If I put in a unit that is too small will it use an excessive amount of electricity trying to cool. Is there a high risk of burning out the motor quickly? Probably the coolest we will keep it is 78degrees F.
Thanks!
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10 Answers
I have a friend who’s an HVAC mechanic and I can ask him but don’t you have one there you can ask? I would think in Florida, there’d be an HVAC place on every block.
Is there insulation in roof and walls? How much ?
How many windows and are they facing south ?
Are there ceiling fans – - how many ?
There is insulation for the walls and ceiling.
3 garage doors that are insulated also.
5 windows, 3 of which face south, but they will have window treatments to block the sun.
We have a similar sized building in North Carolina at a club that I’m a member. We have dances and socials with 100 to 180 people.
No windows, standard insulation in walls and ceiling. We have three industrial sized ceiling fans.
Three two ton HVAC units with “Gas Pack” for heating, each with a separate thermostat. Smaller units are better at removing humidity, large units will cool in a hurry but don’t remove moisture and can “short cycle” which wears out motors . . .
Ceiling fans help a lot in rooms with high ceilings.
40×60x12=28,800 cubic feet.
If we calculate the square footage to assume a 10’ high ceiling, your square footage=2,880.
^^It’s either 11 or 12 foot high ceilings. I wasn’t sure.
Have an HVac guy come out and calculate it for you.
Let the pros handle that. I did a bunch of engineering on my house to calculate the size unit I thought I needed. When I got quotes all the HVAC techs listed units I was sure were too small. I’m glad I second guessed myself because I was wrong. They size units every day, they’re better at it than any of us here. If it’s too small it’ll run continuously. It’s almost worse to get it too big. It’ll cycle on and off frequently which causes wear. This is something you want to get right. None of us know your house and the last time I checked none of us are HVAC techs. Trust me when I say the half dozen engineers here, including me, will probably get it wrong. If you want to fix an existing unit, then some of us can help.
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