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Old 03-10-2011, 05:45 PM   #1
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Home Humidifier Modification - adding a recirculating Pump

I have an AprilAire400 whole house humidifier attached to my heat pump. Unfortunately, it does not work very well at all. This design brings in a small amount of water that is supposed to "wick" up the water panel, and evaporate as the air passes through. Based on my observation, and attempts to maximize performance, it just is a bad design that does not provide enough moisture to the panel.

My idea is to add a small pump that would bring water from a 5 gallon bucket to the top of the water panel. Excess water would drain back into the bucket. I need a very small pump and a way to control the water flow (turn it on/off). I would envision a timer that runs the pump for a minute every hour. I have found pumps in the range of 30 gpm (edit...30 gph) that would be fine, but I need a way to shut the pump off once the water panel is saturated...any ideas?


Last edited by rjkritzer; 03-10-2011 at 06:06 PM.
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Old 03-10-2011, 05:56 PM   #2
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Home Humidifier Modification - adding a recirculating Pump

Welcome rjkritzer, to the best darn DIY'r site on the web.

First off I hope you mean 30 GPH, as GPM would be rather excessive.

You could turn the pump on and off via a programmable timer, or you could leave the pump run continuously and turn a solenoid valve on and off.

Recycled water will have to controlled as well, as the water evaporates on the media, the salts concentration increases over time, the water will need to be drained/flushed.

This would work as far as increasing the efficiency, but you will also have to consider how to interconnect this system with a humidistat so that when you reach you desired set point you shut the system off.



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