Questions tagged [humidifier]

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29 views

Should whole house humidifier leak cold air in the summer?

I've recently been learning a lot about sealing our HVAC ducts to improve system efficiency. On my mission to seal every accessible leak, I noticed my air conditioning/furnace cabinet joints were ...
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1answer
27 views

Thermo Pride OL5-85 oil furnace and Aprilaire 60 humidistat

I have a Thermopride OL5-85 furnace. I've recently added an Aprilaire 600 humidifier, which comes with the Aprilaire 60 humidistat. Wiring diagrams for both are attached below. The humidistat is ...
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45 views

Why do I read no voltage with my humidistat's solenoid is installed?

I've been troubleshooting my humidifier for a bit now (just learning this stuff as I go). It would appear the wiring for the furnace (apparently the transformer) meets the wiring for the humidistat ...
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32 views

2 humidistats for 1 humidifier

I have two zones in my house with a damper system and want to move away from using my humidistat to control the solonoid valve on my humidifier and instead use my Nest thermostats. My zone control ...
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38 views

Aprilaire 700 Humidifier: No power leaving Humidistat

I recently purchased and installed an Aprilaire 700 humidifier. I’m able to read 24V on the R and C wires at the humidistat, but I’m not able to read any voltage leaving the humidistat to the ...
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1answer
123 views

Where should my humidistat on my whole house humidifier be located

I have a Trion cm200 installed on my air handler up in the attic of my house. Toward the end of 2018 I had an entire electric system installed in my house (duct work, air handler and outside ...
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1answer
32 views

Should whole house humidifier be draining when heater/fan is off?

I have an Aprilaire 700 whole house humidifier with a manual mode humidistat on the return. I noticed that the unit was draining water even when the heater/fan was off. Is this expected? I just hear ...
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1answer
34 views

Furnace shutoff switch outlet only hot when furnace is running

I have an old Aprilaire 700 powered by the 110v outlet on the side of my furnace. I recently replaced the old humidistat with a newer Aprilaire 60 Digital. This humidistat comes with the blower ...
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1answer
133 views

Aprilaire 600: No power coming out of humidistat

I am trying to trouble shoot my Aprilaire 600. It was already installed when we purchased the house 3 years ago but I don't believe we ever turned it on after purchasing the house in the summer. The ...
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1answer
47 views

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

A plumber told me that the type of water feed I have tends to leak. I've owned the house for 10 years and it has never leaked, but I would like to think about upgrading. I plan to search the web for ...
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2answers
58 views

How should I know if my humidifier work?

I have a Aprilaire 600 Humidifier installed in my basement, as per the manual it should automatically kick off when the lack of humidity is detected. It didn't seem happening. After I adjusted the ...
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236 views

My humidifier sets off the breaker?

I live in an apartment with a flatmate, in Ontario, Canada. I have a Honeywell Warm Mist Top Fill Humidifier (HWM-340BC from Canadian Tire, I imagine it should be akin to HWM-340B here: https://www....
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1answer
75 views

April Aire 600 powers off while furnace is firing

After having a new furnace and AC installed in the summer of 2018, replacing my 20-year old equipment, the existing AprilAire 600 whole-house humidifier behaves differently than before. During the ...
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2answers
500 views

Would adding ice to a ultrasonic humidifier help cooling in summer?

During summer it's way too hot for me to sleep well. I currently use a fan, but it's so hot that it's not enough. I had the idea of having a sonic humidifier in front of the fan as the fan would ...
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4answers
184 views

How can I prevent a humidifier from getting moldy?

I have a small cool mist humidifier. It has a water tank and ejects a mist and does not have a filter or anything. It is "TaoTronics" brand in case anyone wants to find it. I've noticed pink streaks ...
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4answers
794 views

Water is pouring out of our Aprilaire humidifier

We had an Aprilaire humidifier (600 model) installed in a new house 2.9 years ago. About a year ago, the humidifier began leaking water all over the basement floor. This has happened 3 times with 3 ...
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2answers
191 views

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

I made a cheap, high capacity humidifier from a mist maker, storage crate, and 120mm fan (the fan blows into the crate, which pushes the mist out). This 4" flex pipe works fine to exhaust the mist ...
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3answers
159 views

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

I live nearish Pittsburgh. Our summers can get pretty hot and humid and our winters can get pretty cold. We have been planning to get a whole house humidifier because the house gets really dry in ...
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2answers
206 views

How much cooling is my mist maker humidifier causing?

Closely related to Does a humidifier cool the air? but with a different kind of humidifier, and I'd like to know exact numbers. First question: for the same production volume of vapor, does an ...
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87 views

How can I wire the Humistat and Humidifier so that Humudifier runs only during heat cycle?

I have Honeywell Humidifier HE225A, Honeywell Thermostat TH6110D and Honeywell Humidistat H8908B all installed already. Now my Humidifier runs 24/7 wasting water because it is connected with the ...
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1answer
22 views

How to electrically hook up my humidifier to my furnace and have it run when furnace is running and not A/C in summer

How do I hook up my humidifier to my furnace so it only runs when furnace heats my house. Just want to make sure it does not turn on when A/C in summer goes on. The person who installed my furnace ...
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1answer
519 views

How to wire humidifier to furnace

I have a Goodman high efficient furnace with a carrier humidifier attached to the back. The humidifier wasn't working because the solenoid coil was burned, so I replaced it with a new solenoid. The ...
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0answers
79 views

Can I provide low-voltage power for an HVAC humidifier from a standard outlet?

I recently bought an Aprilaire humidifier to replace an old one that came with the house, which I thought was broken. After connecting the water (which does work and isn't clogged) and the wiring to ...
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37 views

CO, USA - Code Violation for Switch or Subpanel to Power AC & Humidifier?

My mechanical closet is on the third floor of our townhouse and our breaker panel is on the first. To install a steam humidifier, I’ll have to run a 220 line between two floors or outside, both of ...
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1answer
182 views

Whole house humidifier when furnace is in unconditioned space

I have 2 furnaces, one in the garage and one in the attic. These are both spaces with unconditioned air, so they get very cold in the winter. The contractor who helped me configure my garage furnace ...
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1answer
84 views

Do I need a whole-house humidifier in Victoria BC with radiant floor heating?

We are building a new 4000sf home in Victoria BC. Heating will be in-floor radiant (no ducting). The floors are mostly hardwood with tile in a few areas. The year-round average humidity here varies ...
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2answers
165 views

Is my whole-house humidifier installed and working as expected?

I have a Honeywell whole house humidifier model HE240. Its installed on the warm air supply. I thought this would put the humid air into the warm air stream. Instead its blowing air to the cold air ...
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2answers
251 views

Electrical Connection AprilAire 600M Bypass Humidifier

I have a 2-stage furnace and I want to connect the 24VAC from the humidifier to the thermostat connections on the control board. Since the control board has W1 and W2 connectors, which one should I ...
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1answer
177 views

What is the purpose of this PCB next to air pressure switch? Do I need it?

I recently noticed the whole house humidifier (installed by the previous owner) stopped working (Honeywell 280A). Filter dry, no flow, no click from the solonoid valve. I did some investigation and ...
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1answer
537 views

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

The water feed line on my furnace humidifier that connects to the pad started leaking, so I need to replace it. The original was made latex 1/4" OD tubing, but the store doesn't have that size and ...
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2k views

Difference Between Take Off and Starting Collar - Which One Should I Use?

I am in the process of installing a whole house humidifier. I am planning to mount it to the supply side and need to connect the bypass to the return. I'm not sure if I should be using a take-off or ...
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1answer
23 views

removing humifier control

have a new furnace for several yrs. now and i no longer have a humidifier. finally getting around to removing humidifier controller. Question: there are 2 wires, 1 red, 1 white, attached to the ...
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44 views

Carrier humidifier hookup

I had a blower replaced. In doing so, the technician pulled the wiring for the humidifier. The image shows the black wire is in place, the white wire not showing in the image is not wired in. Where ...
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3answers
262 views

Wiring for humidifier to Goodman gmpn080-4 furnace

I have a Goodman gmpn080-4 furnace and am installing a Skuttle 190-1 humidifier. Where do I wire the two wires from the humidistat to the furnace? I see a 24v HUM screw on the board, but not sure ...
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1answer
29 views

Humidity setting for vacant house

What should the humidity be set at a vacant house in Minnesota January through May
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3answers
277 views

Should the solenoid to a Furnace Humidifier be intermittent?

This should be a simple yes or no question but I can't determine it myself. I have an AprilAire 550 Humidifier built into the ducting from my furnace. It appears that the humidifier isn't working due ...
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1answer
319 views

How to change inline water filter on whole home humidifier system?

We have a whole home humidifier as part of the furnace system, but have never really used it since we bought the house. I'd like to get it up and running and am trying to figure out some update ...
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1answer
427 views

Water pad for humidifier-can I buy larger and cut it to the size of my humidifier?

I have a Hunter CareFree Plus (quite old-the thermostat has a analog control -no digital dispaly) and I wanted to start reusing it. It has been in a storage for a while, the filter is quite clogged. ...
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1answer
1k views

Compression fitting with copper nut and plastic pipe keeps leaking

I have a problem with a compression fitting leaking for the water supply of my new humidifier. The connection includes a copper nut and ferrule and plastic tubing. There is a slow drip at the ...
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1answer
476 views

Increasing flow rate on a whole-house humidifier

I've got an Aprilaire 550 on my furnace, but it basically never hits the humidity target. I know it's on (I can see microbubbles moving through the tube between the solenoid and the sponge), but there'...
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1answer
271 views

Running low voltage wiring around HVAC equipment

I added a bypass humidifier to my forced air furnace. The control panel is mounted to the return duct, and the wiring runs from the panel into the furnace fan compartment. Wires run from the water ...
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1answer
1k views

Aprilaire 56 Humidistat not getting power

I have an Aprialaire 56 humidistat that is connected to an Aprialaire 560 humidifier. Currently the humidifier is not turning on and after testing the wiring with a multimeter, the wires going in to ...
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1answer
77 views

Is this humidifier properly installed?

Has anyone seen a humidifier installed this way: humidifier installed to side of air handling unit (hole drilled into side of AHU and discharging humidified air directly into the AHU). Always thought ...
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2answers
265 views

Can you save money with a humidifier and air conditioner combo?

I recently discovered how powerful humidifiers can be in terms of generating cold. What happens if you run a humidifier in a small room that has an air conditioner? The dehumidifier can produce air ...
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1answer
502 views

Will a 3rd Generation Nest thermostat correctly adjust the humidity base on outdoor conditions?

If I plug my whole house humidifier into a 3rd generation Nest, is it smart enough to track outdoor temperature and adjust indoor as needed to keep condensation off the inside of the windows?
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1answer
2k views

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

where should I install the bypass duct and humidistat of a whole house humidifier if the humidifier was installed on the return line? I have the Honeywell Model # HE120A1010 Drum whole house ...
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0answers
6k views

Wiring Humidifier using W and C Terminals vs using Humidifier Terminals

I found info at this thread, and would have placed this question there, but I can't comment since I'm too new. I have HUM terminals on my control board, but they're line voltage (120VAC). I don't ...
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1answer
7k views

Wiring humidifier to furnace fan

I have a Generalair drip humidifier attached to a Trane furnace, having the control circuit board d341396P05. The humidifier is wired to the heat cycle of the furnace, so it starts working only when ...
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2answers
3k views

How long should humidifier take to humidify small apartment?

I have two humidifiers (1, 2) running in attempt to combat some severe sinus issues, likely caused by the very dry winter in Boston. I live in an a 450 sq ft studio apartment. They have been running ...
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1answer
91 views

Does a non-functional whole-house humidifier affect air quality in my home?

I installed a Honeywell Humidifier 18 years ago and it was never cleaned and stopped working 10 years ago. Does this non working humidifier affect the quality of the air in the winter? Should we ...