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correct amount of A/C tonnage for a 2,380 square foot home

Posted by marktym327 (My Page) on
Mon, Jul 4, 11 at 19:17

Our contractor wants to put in a 16 SEER 5 Ton TRANE unit. The house is new construction with 2X6 exterior walls, facing NW. sitting on a hill with very little shade. R-19 walls and R-30 ceiling with 10 foot ceilings with the exception of one or 2 rooms that have a coffer ceiling going to 12ft. Window amounts are average with double pane aluminum vinyl wrapped. Can we get a 4Ton unit since we normally keep the house at between 77 and 78 degrees in the summer in S.E. Texas. I know about a manual J study but nothing more. I have lived in some places where the air never dried out and am as concerned about over-kill as I am about over working the A/C


Follow-Up Postings:

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RE: correct amount of A/C tonnage for a 2,380 square foot home

How large is the house? Is it two stories or one? It the 5 ton condenser single stage or two stage? Do you have the model numbers of all the equipment?


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RE: correct amount of A/C tonnage for a 2,380 square foot home

10 foot ceilings adds quite a bit of space especially with some vaulted in other rooms. You do have very good insulating properities with 2X6 construction and R-19 walls and R-30 ceiling. Are your windows big? Do you have alot of them? Will you have window treatments?

You would be ok with 5 tons if it was a 2-stage. You could run on the low stage alot. 5-tons single stage might be a little bit much.


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