Results 1 to 11 of 11
  1. #1
    Join Date
    Jul 2002
    Location
    North Georgia
    Posts
    6

    Air in Closed (Unoccupied) House

    We have a vacation property that is closed up when we are not there.

    During the summer we run AC when we are there but turn all systems off at other times.

    During the Winter we put the heat on 50.

    Will this cause Mold or other air quality problems?
    The Property is in N Georgia.

    If you disagree what do you suggest. We want to keep the Utility bills at a minimum when we are not there.

    Thanks.

  2. #2
    Join Date
    Sep 2002
    Location
    Boise Idaho
    Posts
    1,032
    maybe an ERV system on a time clock to run for an hour or so a day to keep the house from smelling like a locker room and removing some humidity.

    matt

  3. #3
    Join Date
    Mar 2005
    Posts
    997
    need to run a dehumidifier! when your not their spring summer and fall.

  4. #4
    Join Date
    Aug 2003
    Posts
    906
    drk is right, you'll most likely have humidity problems in Fall and Spring (and summer while you're not there), allowing molds to grow and encouraging insects. Your choices are to keep the house about 20 degrees warmer than the outside daytime temperature or run a low-temp capable (so it doesn't frost up) dehumidifier with a hose connected to a drain.

  5. #5
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    6,257
    Get a good high capacity dehumidifier to maintain <50%RH all the time. No need to operate the a/c when unoccupied. Check out the Santa-Fe advance 90 pint per day dehu. Top rated 5 pints per kw and will maintain <50%RH in 2,500 sqft. of space without a/c operating. Reliable and will save $3-$500 a year. Dehu TB

  6. #6
    Join Date
    Apr 2002
    Posts
    11,808
    does the pints per kwh figure include running the fan steady to dry up all the moisture in that cross flow HX, seems some of those pints get recycled. Factor in that would you not be splitting hairs with the energy efficiency of a kenmore?
    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

  7. #7
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    6,257
    No If concerned do not operate the fan continuously. All dehus have the moisture evaporating from the coil to the air during the off cycle. The AXX has very little moisture on it. Most of the moisture is on the coil. The dehumidistat has a wide dead band. TB

  8. #8
    Join Date
    Apr 2002
    Posts
    11,808
    in some cases though it behaves like a mositure trap and leads to problems, similar to a wet filter down stream of a cooling coil. The solution seems to run the fan steady to dry it out.
    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

  9. #9
    Join Date
    Jul 2002
    Location
    North Georgia
    Posts
    6

    Recovery after loss of power

    Thank you for your thoughts on a Dehumidifier.
    We have a stand alone Dehumidifier in our Primary Residence.

    However, it must be restarted manually after a power outage or blip.
    This will be a problem at a location where we may not be there for 6 months or more. Also the Electric service is less reliable there.

    Do your suggestions cover this situation? Any other suggestions?
    Do some models self start with the same settings after an outage?

    Thanks
    PricePerformer

  10. #10
    Join Date
    Apr 2002
    Posts
    11,808
    Low end GE dehumidifiers will restart when power is restored, I am sure other brands will also
    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

  11. #11
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    6,257
    Considering how critical humidity control is in an unattended situation, a high quality dehumidifier is important. Units like Santa Fe are used in commercial applications. The Santa Fe dehu systems are more durable than the residiental units. Restarts are assured with top quality electromechanical controls. This eliminates the restart problems. This These units remove large amounts of moisture per kw dispite cool spring/fall temperatures. For winter moisture problems, prefer using a small amount of dry outside air to remove residual moisture. TB

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image