Ask Your Question

Angie's List Answers is the trusted spot to ask home improvement and health questions and get answers from service companies, health providers and consumers. For ratings and reviews on companies in your area, search Angie's List.

Top 30 Days Experts
Rank Leader Points*
1 kstreett 240
2 Guest_9020487 110
3 Guest_9190926 105
4 GoldenKid 100
5 ahowell 95
6 KnowledgeBase 95
7 skbloom 80
8 Guest_98024861 70
9 Guest_9311297 70
10 Guest_9400529 70

*Updates every 4 hours

Browse Projects By Category

Question DetailsAsked on 10/21/2013

What size A/C unit is needed for 1400 sq. ft. home"?

Do you have the same question? Follow this Question

2 Answers


There is science that must be used to determine the correct size. It is Manual J and Manual S, from these are the industry standards insist on them when shopping around.

And start by finding the best contractors on Ansie's List!


Answered 6 years ago by BayAreaAC


To figure it correctly, as BayAreaCool said, requires calculations based on square footage of home, square footage of windows, sun exposure, local climatic cooling load, average insulation effectiveness in walls and attic, etc - VERY roughly about 400-600 SF per "ton" of cooling, so your size house would probably be in the 3 or maybe 4 ton (if in really hot area with full sun exposure) range.

You really need to get bidders to show you the calcs for needed system capacity, because undersizing will not cool as fast as you want and will overwork the unit, causing premature failurer, whereas oversizing can result in excessively cold airflow and freezing up of the system, result in damage or in extreme cases total destruction of the guts of the compressing unit.

Answered 6 years ago by LCD

Related Questions

Terms Of Use
Privacy Policy