I am having a problem keeping the humidity under 60%. In order to get it to 55% or lower I must set thermostat to 67 degrees. If I set to 68 degrees or higher the humidity goes above 60%. Air filter is clean, condensate drain is clear, coil is clean. Any ideas?
Condo Humidty
BRETT132
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I am having a problem keeping the humidity under 60%. In order to get it to 55% or lower I must set thermostat to 67 degrees. If I set to 68 degrees or higher the humidity goes above 60%. Air filter is clean, condensate drain is clear, coil is clean. Any ideas?
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Oversized AC???
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Where are you located?
Do you have the fan set to run constantly? When you do that condensate left of the fins at the end of the cycle re-evaporates. A good article on the topic here:
https://www.energyvanguard.com/blog/38619/Don-t-Set-Your-Air-Conditioner-Thermostat-Like-This
https://www.energyvanguard.com/blog/38619/Don-t-Set-Your-Air-Conditioner-Thermostat-Like-This
Do you have the fan set to run constantly? When you do that condensate left of the fins at the end of the cycle re-evaporates. A good article on the topic here:
https://www.energyvanguard.com/blog/38619/Don-t-Set-Your-Air-Conditioner-Thermostat-Like-This
https://www.energyvanguard.com/blog/38619/Don-t-Set-Your-Air-Conditioner-Thermostat-Like-This
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Its now oversized due to no or low load. Get a dehumidifier!
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The %RH inside your space is dependent on the amount of moisture in the outside infiltrating fresh air plus the moisture the occupants add minus the moisture removed by your a/c.
Outdoor air in your area is dry this time of year. The outdoor dew dew point is +-20^F. Warming up 20^F dew point air to 70^F results in a <20%RH in the warm space. You are adding enough moisture to humidify the air upto 60%RH. This means you are not getting enough fresh air to pass through our home. A healthy space needs a fresh air change every 4-5 hours to purge indoor pollutants and renew oxygen. Cracking windows when dry outside will remove the moisture from the occupants. Good design would have a small mechanical fresh air ventilation/filteration device that would operate when occupied.
This is a two edged sword, fresh air change purges pollutants and renews oxygen while drying when the outdoor dew points are low. Also makes the home damp when the outdoor dew points are high during the 3 damp seasons of the year. During the hottest weather, a properly setup a/c will maintain <50%RH while removing the sensible heat in the space. During damp cool weather a small whole house dehumidifier will remove the excess moisture from adequate fresh air and occupants moisture. In the old days, buildings leaked more air and people just lived with too dry and too wet air air passing through the space.
Condos and well built modern home currently being built need mechanical fresh air plus a humidifier and a dehumidifier when located in a green grass climate with occasoinal snow.
Start by cracking windows operating exhaust fans to lower the indoor %RH. When the oudoor dew point rises above 55^F, dehumidification will be needed.
The long term solution is a small whole house dehumidifier with fresh air ventilation option, Check out Ultra-Aire.com.
If to dry in the winter consider adding a humidifier also.
YOur thoughts?
Regards Teddy Bear
Outdoor air in your area is dry this time of year. The outdoor dew dew point is +-20^F. Warming up 20^F dew point air to 70^F results in a <20%RH in the warm space. You are adding enough moisture to humidify the air upto 60%RH. This means you are not getting enough fresh air to pass through our home. A healthy space needs a fresh air change every 4-5 hours to purge indoor pollutants and renew oxygen. Cracking windows when dry outside will remove the moisture from the occupants. Good design would have a small mechanical fresh air ventilation/filteration device that would operate when occupied.
This is a two edged sword, fresh air change purges pollutants and renews oxygen while drying when the outdoor dew points are low. Also makes the home damp when the outdoor dew points are high during the 3 damp seasons of the year. During the hottest weather, a properly setup a/c will maintain <50%RH while removing the sensible heat in the space. During damp cool weather a small whole house dehumidifier will remove the excess moisture from adequate fresh air and occupants moisture. In the old days, buildings leaked more air and people just lived with too dry and too wet air air passing through the space.
Condos and well built modern home currently being built need mechanical fresh air plus a humidifier and a dehumidifier when located in a green grass climate with occasoinal snow.
Start by cracking windows operating exhaust fans to lower the indoor %RH. When the oudoor dew point rises above 55^F, dehumidification will be needed.
The long term solution is a small whole house dehumidifier with fresh air ventilation option, Check out Ultra-Aire.com.
If to dry in the winter consider adding a humidifier also.
YOur thoughts?
Regards Teddy Bear
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Or crack a window!
Regards Teddy Bear
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Crack a window any time the condo is occupied during calm winds to get fresh air change.
The effect on the inside moisture level depends on the outdoor dew point.
An example is 40^F, 100%RH a 40^F dew outside air passing through a home a 70^F, home humidity will be <35%RH.
You must understand dew point verses %RH.
Regards Teddy Bear
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