Results 1 to 3 of 3
  1. #1
    Join Date
    Mar 2007
    Posts
    22

    hot or cold water for humidfifer

    is it better to use hot water or cold water for a bypass humidifier / thanks for your input thanks jim

  2. #2
    Join Date
    Jun 2007
    Location
    Metro St. Louis
    Posts
    181
    Quote Originally Posted by dizzy46 View Post
    is it better to use hot water or cold water for a bypass humidifier / thanks for your input thanks jim
    For a heat pump, you'll need hot water due to the lower temperature of the heat output. For a gas/oil, you'll be fine with cold.

  3. #3
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    6,338
    Quote Originally Posted by dizzy46 View Post
    is it better to use hot water or cold water for a bypass humidifier / thanks for your input thanks jim
    The water flow to a humidifier is so low (one gallon per hour), the water cools via the copper tube before the water gets to the humidifier. Even if the water was hot entering the humidifier, evaporation cools the water rapidly. The heat to evaporate the water comes from the warm house air. The wet bulb temperature of the evap pad cools to 45^F with 100^F warm air. One lb. of water needs 1,005 btus to evaporate. One lb. of 120^F water has 80 btus at best. So, save your hot water. Best to tighten up your home to slow the dry winter air from passing through. Also extend your fan run to time to allow enough time to humidify. Also avoid over humidification. The sign of max humidity your home should have is slight condensation on the lower edge of your coldest windows. Regards TB
    Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
    Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
    Use +Merv 10 air filter. -Don't forget the "Golden Rule"

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

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event