Humidifier appears useless

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Old 03-14-08, 06:08 PM
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Humidifier appears useless

HI all and thanks in advance for any help that might be offered. I just installed a Hamilton 12HF humidifier to my N9MP 90+ Single Stage Furnace.

The setup
The Humidifier is attached to the cold return and the flow thru is attached to the warm air duct. Cold water is used.

I understand that attaching the humidifier to the return duct and using cold water lessen the effectiveness of the humidifier
but I'm getting NO humidity increase since the installation.

The Humidifier's damper is open and water is flowing. I've increased the heat in my house to 80F to see if the increased heat put out by the furnace would warm the water further but I'm still at 15% Humidity which was the level before installation. My Humidity detector is working and I've placed it over 2 vents on the ground floor but the reading remains at 15%. The Humidifier is set to release water whenever there is airflow, fan or heat but I'm getting nothing

I don't know what else to do beside using hot water but I still think I should see some result and I've seen none. Any help and suggestions would be appreciated
 
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Old 03-14-08, 06:51 PM
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Originally Posted by augustfall View Post
I understand that attaching the humidifier to the return duct and using cold water lessen the effectiveness of the humidifier
Return or supply has no issues with this. the Cold water may have some.


but I'm getting NO humidity increase since the installation.

The Humidifier's damper is open
Taking the cover off, are you feeling hot air coming out of the bypass duct, and air sucking into the return?

I'm still at 15% Humidity which was the level before installation. My Humidity detector is working and I've placed it over 2 vents on the ground floor but the reading remains at 15%.
What reading you get when you fill the sink full of hot water and put the humidiguage above the sink?
 
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Old 03-14-08, 07:23 PM
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Thanks for the reply. Yes plenty of hot air is coming from the bypass duct and I can feel it going into the return duct when the filter is removed. No hot air is reaching my hand when I place it opposite the bypass duct, it is all being sucked into the return.

With the filter on and the cover open I can feel
the force of the hot air somewhat if I place my hand on the other side of the Humidifier but with the filter on and the cover closed I'm sure the hot air is going thru the filter and into the return duct as I feel no hot air escaping thru the casing.

I just filled up the kitchen sink and placed the humidiguage above it and got a reading of 60.
 
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Old 03-14-08, 08:08 PM
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ok, guess the gauge is not "stuck". How cold is it outside?

I don't know that brand, but does the pad have a paint/marking on the end? If so, is the marking on "TOP"?
 
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Old 03-15-08, 02:40 AM
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The filter has a label denoting the bottom and I inserted the filter accordingly. At the time of your reply the outside temp was in the 40's.
 
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Old 03-15-08, 05:04 AM
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40˚ at 15% humidity??? Where are you out of?? What is the outdoors humdity?
 
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Old 03-15-08, 09:09 AM
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I would inspect the filter while the furnace is running, perhaps with the fan only. Is the filter visibly wet? All the thing does is wet the air filter and push air through it, so if that is what is happening it is working as advertised.

disconnect the water supply tube from the air filter. When the furnace fan goes on and the valve opens water should shoot out, not dribble out. Read the manual and see how to inspect water filters/strainers. Could be blocked. Manual should have maintenance check list of such items, go through it. Do you hear the valve open when the fan comes on?

For some reason your dried out house is still absorbing all the water being put into it, when the house stops the humidity will remain in the air. Your house might also be loose in that dry air from outside gets in. I agree this may be BS.
 
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Old 03-17-08, 12:33 PM
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Everything is 'working' as it should as far as I can tell, of course it isn't working truly as we are getting nothing from the Humidifier.
 
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Old 03-17-08, 01:38 PM
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Again, where are you out of?

With temps in the 40's˚ you are not going to get much run time on the furnace, and 15% is awuful low! What is the outdoor humidity?
 
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Old 03-19-08, 01:47 PM
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Wink

After the furnace has made a run and shut down . Go into the hum and see if the filter is wet all over ????
 
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