Aprilaire 600 - Supply or Return side Install?

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Old 10-14-04, 08:09 AM
R
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Aprilaire 600 - Supply or Return side Install?

I just purchased an Aprilaire 600 bypass humidifier and my instructions say it can either be installed on the supply or the return. On the sample pictures of furnace configurations it looks like I should install mine on the supply but am wondering is one way or the other more efficient and what are the pros and cons of each. I have a new house, ~2600 sq. feet, and a gas furnace. Your thoughts are appreciated.
 
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Old 10-14-04, 08:38 AM
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Id install the unit on the cold air side in the cold air drop

ED
 
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Old 10-14-04, 12:43 PM
billstewart
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Wouldn't installing it on the cold air side, so that cold air is blowing through the humidifier, evaporate less water that having warm air blowing through it?
 
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Old 10-14-04, 01:11 PM
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When the unit is installed on the cold air side it sucks in so that is warm air comeing out of the supply duct to it.

ED
 
 

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