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Can ultrasonic humidifiers be used in a bypass setup for a whole house humidifier?

My home is about 3000sqft, with lots of high ceilings. I'm having trouble keeping the relative humidity up in the winter. When it gets down to 10F outside, the RH drops down as low as 25%. This is ...
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2answers
50 views

Saddle Valve turn on for humidifier

First winter my mother is widowed, we can't get the humidifier on. Thought maybe the water to it is turned off. I'm on the phone with her and telling her to turn this saddle valve counter clockwise to ...
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1answer
50 views

Is there a danger of back flow from water heater while replacing a saddle valve?

We have a leaky saddle valve feeding our humidifier. We eventually want to get a real valve installed, but for now are looking for a cheap near-term solution. Here is my concern: the original ...
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1answer
79 views

Can I connect a whole house humidifier so that it's always on when the furnace is running?

I installed the model 500 Aprilaire. It seems to work properly, but I noticed that it only seems to maintain a max 45% humidity. So basically it's not always running when my furnace is on unless it's ...
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1answer
81 views

Can I install a humidifier on a horizontal duct?

I have a Honeywell whole-house humidifier (HE360A1075). Can this be installed on the horizontal ducting here on the left? It feels like it's an aluminum box under the tape. This is both gas heat and ...
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33 views

Options for humidifier

Winter is approaching and the cool weather is making the air dry in our home. We're using room humidifiers but want to install a humidifier which can go on our furnace. However, we have very limited ...
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3answers
45 views

Can forced central air be retrofitted with central humdifier?

Several homes I'm considering have central air conditioners, but radiators or baseboard heaters. Is it possible to use the A/C ductwork to provide humidity to the home? I assume most central ...
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0answers
49 views

How do I raise the humidity levels in my home?

I installed hardwood flooring in my home late last fall. The humidity level in my home this winter dropped incredibly low (20%). I'm not sure if it's related to the new hardwood. I installed a whole ...
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1answer
62 views

Water has quit running thru my humidifier.

Furnace humidifier dry as a bone. have changed the filter, duh, that is the only thing I know how to do! Bottom line, there is no water running through it.
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2answers
460 views

How can I locate and eliminate mysterious water hammer related to humidifier?

In the morning, early, when my thermostat kicks back up, I hear a banging/rattle sound that I've determined is related to my humidifier. It only lasts about 10 seconds so by the time I get down to the ...
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1answer
52 views

Does the humidified air get filtered in a bypass setup

In a whole-house bypass-humidifier setup, the humidified air still has to go through the furnace filter. Doesn't that filter out some of the water vapor? Especially with the expensive filters that ...
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2answers
471 views

HVAC air handler with a built-in humidifier

I am in the process of choosing an air handler to use only for AC. I plan to keep radiant heat. However, in the winter, I would like to use the AC system to blow humidified air to compensate for the ...
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2answers
624 views

Can I install whole house humidifier in AC ducting?

Just grabbed 2 Honeywell whole house humidifiers: HE360A1075. It's the best model Lowes has and recommends. I have 3 floors and a basement in an old (1890s) victorian house. We have cast iron ...
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3answers
4k views

How do I wire a humidifier without a 24 VAC IN terminal?

The instructions for the humidifier I'm installing says to connect the humidistat wiring to the two terminals "marked 24 VAC IN". My furnace doesn't have terminals marked that. I have R,C,W,Y.G. Am ...
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1answer
133 views

Can I install a flow through humidifier on either side of the duct?

I was about to install a Wait6000 whole home humidifier when I hit this snag in the plan. On page 3 of their manual (PDF), it says the cold air return duct must be at least 10" wide. The diagram ...
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1answer
2k views

How to diagnose a broken Aprilaire humidifier (Model 600)?

I have an Aprilaire Humidifier Model 600 (or maybe 600M) mounted on my furnace. The humidifier is not turning on (i.e. letting water flow over the filter) when the furnace is on. The below images ...
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1answer
728 views

How well do whole house humidifiers work?

We are moving to an area where it gets cold and snows in the winter. We come from a desert area where it is never very cold except for the dead of winter, and where we use the heater very seldom. We ...
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3answers
3k views

Does a whole house humidifier go on the intake or outlet of the furnace?

On what side of the furnace do I install the tank of the humidifier (the warm side or the return air side)?