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    carolyn_miann's Avatar
    carolyn_miann Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 12, 2013, 04:08 PM
    Determining the right size central A/C unit for 1,000 sf home
    We just had a new HVAC system installed in Maryland and the A/C unit outside seems HUGE to me. It's twice the height of what we had in place beforehand. The A/C is by Bryant, model 180BNA024. Our home is 1,000 s.f. I can't seem to find information on how many BTUs this unit uses. I'm just wondering if we were sold a unit that's way too large for our space -- sure seems like it given its outside size. The installer told us it was so large because it's so efficient. What do you think?
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #2

    Mar 12, 2013, 05:02 PM
    One way manufacturers make equipment efficient is to make it large resulting in more natural convection & less need for energy consuming fans.

    I believe your unit to be 24,000 BTU (2 Tons).
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #3

    Mar 12, 2013, 06:17 PM
    Yep 2 ton and to increase efficiency the condenser coil is much bigger. 2 sounds about right for the square footage. A quick "guesstimate", not knowing anything else, is 20 BTU per sq. ft. so it is certainly within range. # of windows, how they face, tree shading, # of people etc. all have to be factored in.
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #4

    Mar 13, 2013, 05:29 PM
    Definitely a two ton condenser. And that sounds right for the application. No worries here, some of these bad boys can get so big you need a fork lift to move um around, lol. I am curious though, is this an r22 or r410a unit? The new 410 units are normally smaller than the 22 units, but they can still get a bit hefty when the seer goes up. The old 22 units were getting rediculously big with the higher seers towards the end.
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