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    dshipl01's Avatar
    dshipl01 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    May 14, 2007, 12:13 PM
    Cooling 2nd floor of 2400 sq ft home
    I have a two story house, 12 years old. Temperature upstairs is five or six degrees hotter in summer than downstairs.

    Would a variable speed A/C help? The air coming out of the vents is very cool. The problem is air flow volume to the 2nd floor.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    May 14, 2007, 04:34 PM
    Variable speed will not help at all. The problem is your duct system. You will have to make expensive changes to the duct system OR install a separate unit for upstairs to correct the problem. If anyone tells you different they are not telling the tuth.

    You can try to crank your blower fan to a higher speed but then all the humidity will not have enough time on the coil to be removed. Your house will feel damp.
    JackT's Avatar
    JackT Posts: 260, Reputation: 19
    Full Member
    		  
    #3

    May 14, 2007, 06:37 PM
    Sometimes you can close off some of the dampers in the lower level forcing more cfm to the upper level. If your duct work isn't big enough, it will be a lot noisier. I usually prefer to install a second unit for just the second floor. You can run it only when you need it and not have to operate the main downstairs unit as hard.
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
    Ultra Member
    		  
    #4

    May 14, 2007, 09:06 PM
    There really isn't a "cheap fix" for this problem, you will either have to install a separate system for the upstairs or install a zone system, the zone system would allow you to have a little more control over the upstairs tempature. Is the system sized properly to cover the upstairs?
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