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7 votes
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What happens to quarter valve when I don't turn it on/off completely?

A quarter-turn valve is a poor choice for metering (controlling the flow, as you want to.) They are best for "on/off" operation but plenty of folks use them for flow control anyway. The ...
Ecnerwal's user avatar
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4 votes
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Wiring humidifier to furnace fan

The terminal circled in red should be labeled HUM-H, which is the humidifier (hot) terminal. This terminal is energized to 120 V when the system is running in heating mode. The terminal circled in ...
Tester101's user avatar
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4 votes
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How to Break Apart an Unbreakable Humidifier to Clean It

Put the humidifier in your garage or outside. Put a 50/50 vinegar/water solution into the tank and turn it on. Let it run until the solution is gone. This will help dissolve the deposits. If that ...
FreeMan's user avatar
  • 47.4k
4 votes

Should my humidifier be able to maintain 38% humidity in the winter?

Depends how badly the house leaks air, more than the square footage of the house, really. If the house is leaky, cold dry air comes in and warm moist air goes out and your humidifier has limits on how ...
Ecnerwal's user avatar
  • 217k
4 votes

Should my humidifier be able to maintain 38% humidity in the winter?

Yes one would expect that humidifier to do a pretty good job. "Time for a new pad" was the first thing that came to mind but you did mention having already replaced that. The 700 is a fan-...
Greg Hill's user avatar
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3 votes
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Aprilaire 56 Humidistat not getting power

Wired in this way, this should have never worked. W2 is the terminal that the thermostat uses to activate second stage heat. It is not energized by the furnace, but by the thermostat. Also, it ...
Tester101's user avatar
  • 132k
3 votes

How to calculate CFM/pressure needed to move water vapor through duct?

Propeller fans aren't really good at producing any static pressure. They can move air quietly but as soon as they see any restriction air flow stops. Your basically making a remote mount fan assist ...
Joe Fala's user avatar
  • 6,374
3 votes

Water is pouring out of our Aprilaire humidifier

The Aprilaire humidifiers, including the 600, use an orifice piece to restrict water flow. It should be at the end of the line coming into the solenoid, but someone may have put it on the other end. ...
Camron B's user avatar
  • 141
3 votes

April Aire 600 Humidistat Question

No, it is not normal. The solenoid allows water to run over the humidifier's screen. If the blower isn't running....it's a pointless waste to have water running. I assume you aren't confusing the ...
Steve Wellens's user avatar
3 votes
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Furnace wiring diagram: HUM 120 VAC or 24 VAC can be used

“dry contact terminals” mean a connection that gets closed/opened (usually by a relay). No power is provided by the contacts - it’s just a switch. The power comes from the device being controlled. It’...
nobody's user avatar
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2 votes
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How can I seal HVAC duct damper?

There are a few ways to accomplish this. On the cheap DIY side, you could cut a few pieces of tight fitting cardboard (stack them and tape them together) to create a plug. I would punch a couple small ...
Ben Welborn's user avatar
  • 6,212
2 votes
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Using a humidistat? (humidifier)

You asked a basic question of how to set the humidity level on the humidistat itself. The easy answer is a table that is printed right on the face of my humidistat. It's easier to use than ...
Tyson's user avatar
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2 votes
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What is the name for the brush to clean this humidifier valve on my HVAC

That looks like a drain, not a supply line. The device with the wires is an EZ Trap Condensate Overflow Cut-Off Switch Here's a similar device that includes a trap brush. Here's just a trap brush.
Tester101's user avatar
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2 votes
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Just installed aprileaire 700 whole house humidifier. Furnace takes air from outside

Had to move controller (with sensor on back) farther away to where only in house air was moving through duct. In my house this was at the ceiling as the return plenum area was mixed with outside air ...
eaglei22's user avatar
  • 1,085
2 votes

where should I install the bypass duct and humidistat of a whole house humidifier

The intake duct comes from the heated air supply -- so basically the closest place you can get it before any of your zones (to ensure it is getting air anytime the furnace is on, regardless of zone). ...
gregmac's user avatar
  • 29.1k
2 votes

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

I had the same issue, no water. Ran the troubleshooting test here and found that I also had a bad solenoid, it just wasn't opening to allow the incoming water to run over the metal filter. Try blowing ...
Dave's user avatar
  • 21
2 votes

Material for water feed line on furnace humidifier. Latex required?

I called Honeywell about the issue and they said both Latex and Vinyl were fine to use for the humidifier water feed tube.
Dan's user avatar
  • 131
2 votes
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How much cooling is my mist maker humidifier causing?

What you're asking about is the latent heat of vaporization. It is 970 real BTUs per pound of water, or 2260 joules per gram. A joule is a watt-second. A BTU raises one pound of water one degree ...
Harper - Reinstate Monica's user avatar
2 votes

Is it wrong to install both a whole house humidifier and a whole house de-humidifier?

The problem is that your air conditioner is probably over sized or the fan speed is set too high. An air conditioners primary function is to remove moisture from the air. To big of an air conditioner ...
Joe Fala's user avatar
  • 6,374
2 votes

Is it wrong to install both a whole house humidifier and a whole house de-humidifier?

Pgreen2--Let me give you the novice approach to your problem. I live in Butler, Pa. and here is what I do, and it works. @Joe Fala is pretty much spot on but here is what you can do as a home owner. ...
d.george's user avatar
  • 12.4k
2 votes

What is the name of this water source for a whole house humidifier?

These are called "saddle valves" or "vampire taps". They just poke a hole in the pipe with a little pressure around the hole to seal it. They almost always leak after some time but they are quick ...
JPhi1618's user avatar
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2 votes
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Is this the correct wiring for Honeywell humidifier?

I just found my answer. I've been searching for documentation for the humidifier on how to connect it to the furnace. This morning, I decided to look for documentation for the furnace to see if it ...
Jason's user avatar
  • 31
2 votes

Piping humidified air through a wall

To me, the biggest issue here is that, while "the condensation would be only on the inside of the pipe", you are in fact anticipating condensation, which can lead to mold, in the pipe. And ...
Peter Duniho's user avatar
  • 1,875
2 votes
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How to troubleshoot a leak in an Aprilaire humidifier?

I can't quite tell whether you're seeing normal operation and mistaking it as a problem or if there's actually a problem. The white crumbly stuff is scale, also called mineral deposits. It is calcium ...
Greg Hill's user avatar
  • 30.8k
2 votes

Why place humidifer on cold air return

The biggest reason is probably "because that's where it fits." It's true that warmer air can carry more grains of water than colder air can. That's a good physics-based reason for locating ...
Greg Hill's user avatar
  • 30.8k
2 votes

Carrier Weathermaker 9200 Humidifier Ecobee blows 3amp fuse

The solenoid went bad and was blowing the fuse. Replaced solenoid and humidifier works now.
zhouse28's user avatar
2 votes

How to Break Apart an Unbreakable Humidifier to Clean It

Freeman's answer provides a good explanation of how to fix the issue so I'd like to provide an explanation of how to prevent it. Use distilled water in humidifiers if it's available to you. From https:...
MonkeyZeus's user avatar
  • 16.6k
2 votes
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Aprilaire 400 solenoid valve gets stuck at opening resulting in buzzing (hammering?)

Well vinegar sounds like a good idea but it is an acid. As an acid it will attack the tin in the brass leaving the copper. It should be ok. I have valves that get sticky all the time: the problem is ...
Ed Beal's user avatar
  • 103k
2 votes
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Swamp Cooler AND Humidifier in One System

It's true that a swamp cooler and a humidifier (together with its associated furnace/air handler) both have "blow air around" and "make the air wet" on their lists of features. But ...
Greg Hill's user avatar
  • 30.8k
2 votes

Problem with water rushing through whole house humidifier

In my humidifier the pan on top of the filter is a piece of rubbery flexible plastic that needs the filter intact to be flat and level to allow the water to flow out and run down the little holes. ...
MacGuffin's user avatar
  • 393

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