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rubicon789 01-23-2007 07:15 PM

HVAC Humidifier Question
We just recently purchased a new home. It has gas heat and a humidifier which is connected to the return. My problem is that the when I turn the water supply line on and the humidifier runs, it just wastes so much water. which in turn fills the condensation pump up cause it to run constantly. The only way I can regulate it is to tighen the valve on the supply line. Which to me seems kind of wrong. SHouldn't the humidifier only us what it needs to? We have an AprilAir 440 humidifer. ANy help guy/gals?

#CARRIERMAN 01-24-2007 11:12 AM

Hi rubicon789

It sounds like either your humidistat is turned up all the way or you need to replace the water valve on top of the humidifier. Check the humidistat first.

Good luck

rubicon789 01-24-2007 02:03 PM

CARRIERMANI have installed a Ritetemp Thermostat/humidistat about 2 weeks ago. I have the humidity set to a min of @ 30% and max @45%. The water valve is actually on the bottom of this model. Do you think I should change it out? And should that piece actually regulate an exact amout of water to be used? If so, what is the reason for the condensation pump that the humidifer drains into? Sorry for all the questions I am new to home ownership, am very handy but not in HVAC stuff. Thanks

JoulesWinfield 01-25-2007 10:31 AM

Im not familiar with your particular humidifier but mine has a little pan in the bottom that uses a float switch to turn off the water when it is full.

There should definately be something on the humidifier that regulates and stops the flow automatically.

rfjm58 04-10-2007 07:09 AM

Most Apriaire humidifiers are flow through. The do waste alot of water. The reason for the waste is to flush the expanded aluminum humidifier pad from accumulating to much mineral deposits. They do make another unit for furnaces that don't have a drain called model 400. . Copy/paste this link to see this model. Note that most humidifiers need either a hot water supply or a minumum of around 120 degree air flow to work properly. I have a model 600 hooked up to cold water with only 100 - 110 air temp & the unit and I cannot bring up the humidity in my house. In this day and age of conservation & taxes on water usage I don't know why companies are allowed to sell products like this. They are economical to purchase and reliable but very wasteful.

rubicon789 04-10-2007 08:27 AM

Thanks for the replys guy's. I have put this on the back burner till next fall. Since spring is here and we don't need the humidifer anymore this year. However next year I will be investing in a new on. The air was just too dry without and efficient humidifier. Probably costing us more in monthly heat b/c of the dryness.


There should definately be something on the humidifier that regulates and stops the flow automatically.
Yea the only thing that regulates flow in my model is a thing called an orfice. It is like a small plastic washer placed in the pipe that is supposed to regulate the flow to a certain gph... it's bs though. I am going to get on the is an automatic shut off. As well as run a new line from the hot water pipe. B/c now it is off of a cold line. The things you learn when you buy a home.

rfjm58 04-10-2007 07:30 PM

Two things to remember when you select a new unit. Flow through units are exactly what they say. They ALL waste water to some degree. More goes down the drain than into the house. Next the hotter the water the better, up to the max for the specific unit. Plus the shorter the run the better so the hot water gets there quickly. You will need to research alot when you are ready because there may be some new technology out there. Good luck.

rubicon789 04-11-2007 08:20 AM

Thanks for the heads up

jugo 01-13-2009 11:06 AM

I know this post is old, but I found it and read it and I want to chime in....

I have done some reading and the consensus is that humidifiers help in both the winter and summer.

The air is warmer in the winter and cooler in the summer and humidifying also helps the air quality in the house.

As for waste water.... It does not have to be.

I have a bathroom right next to my HVAC unit int he basement and I have routed the drain from the HVAC and my humidifier to go to the tank in the commode.

This was the water is not just flows into the tank and gets used for flushing.

I have no way of controlling overflow att his time, but with 6 little girls in the house... I don't think that'll be a problem.

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