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Questions tagged [humidity]

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2answers
42 views

Why does humidity change suddenly when my fridge's compressor turns on/off? [closed]

I'm building a curing chamber in an old fridge, and I've started by capturing some data on the fridge's performance: I'm really unclear on what's happening when the compressor changes state. When the ...
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5answers
4k views

Does A/C encourage mold growth

I think i'm being sold bunk by a mold company, but not sure. We live in the tropics, we recently had our bathroom ceiling flood due to a burst pipe, and went away immediately after. (the landlord had ...
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2answers
31 views

Risk of insulation triggering mold growth?

The unfinished basement gets water which is pumped out with a sump pump. (Water from heavy rains percolates into the basement.) Company A gave me an estimate to insulate the attic. So did Company B, ...
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1answer
23 views

How do you increase humidity with HRV system?

I’m wondering how to increase the humidity in my home. I have a venmar constructo HRV system and have looked at the manual and many videos and can’t find the answer. I’d like my humidity to be 35% for ...
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1answer
37 views

Reduce high humidity in attic

My attic has high humidity. I put a combo temp-humidity monitor and it was in the high 70s. It’s 30 degrees outside. I’ve read about what could cause the high humidity and two key things came up: ...
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1answer
43 views

To reduce damp: heat or dehumidifier?

We have one room of a house which isn't much used, so we don't turn on the heating in it, or wouldn't except that it gets damp, so mold is a concern. For reducing damp, is it more efficient to turn ...
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2answers
110 views

How to deal with bedroom condensation/moisture on winter mornings?

In late September when the weather started cooling down here in Surrey BC Canada, we started to see morning condensation on our windows (newly installed last year): My wife and I and our son sleep in ...
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1answer
57 views

Why is my air conditioner running when the house is below the set temperature?

We recently had a whole new system installed for HVAC. We had a lennox furnace with dehumidifier and UV thing, along with the exterior lennox condenser for A/C. We have the iComfort S30 thermostat, ...
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0answers
21 views

Bypass humidifier and forced air - no results

I have bypass Honeywell HE100 installed on a return side with 6 inch duct coming from the supply. Without the heat (fan only), I see that air that leaves supply is 90% humid. When the heat is on it ...
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0answers
21 views

mitigate mold concerns from humidity in sauna in PNW

I'm building a sauna into a house in the Pacific Northwest. One wall is external, three walls are internal, and there is an attic overtop where I can vent to the outside. All walls and ceiling of ...
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2answers
54 views

draining sauna into crawlspace

I'm thinking of setting up a drain from my sauna through the floor of my house into my crawlspace. Practically speaking, would this damage the house?
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1answer
29 views

Measuring humidity through ceramic tile to deduce a course of action

Just bought a house, and during the inspector noted in his report that the "shower step" (the door frame on which glass door rail sits) has a slope the wrong direction, causing water to accumulate ...
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1answer
25 views

Installing insulation board in basement to control moisture

I just had a basement waterproofing job done and it is doing an awesome job relieving pressure and keeping the basement flood-free (we just had a very large amount of rain here in central PA and it ...
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1answer
61 views

Will a curtain across a doorway significantly reduce air flow?

I've got a stairway down to a basement that's wide open at the top and at the bottom. The basement gets pretty humid, so we run a dehumidifier down there, but the wide open entry undoubtedly makes the ...
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2answers
2k views

Basement Humidity Increases When Central A/C is Running

With regards to humidity, I seem to have the opposite intended effect in my basement when my central A/C is running... I live in Maryland and have a 1960s Cape Cod style home with an unfinished ...
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1answer
165 views

How to Wire Fantech FR100 in-line exhaust, venting two bathrooms with Two TopGreener TDHOS5 Humidity Motion Sensor switches

The Fantech FR100 fan requires Neutral & Load. That's easy enough, and the multi-switch diagram shows just a black from each switch. The TopGreener (really Enerlites) TDHOS5 requires Neutral &...
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1answer
69 views

How to construct a time capsule bottle? [closed]

We (my daughter and I) are building some time capsules in a bottle, i.e., putting photos, letters, small memories and so inside some glass bottles. We plan to have a good lifespan of some: 10 years, ...
2
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1answer
224 views

Dehumidifying an unheated garage

I have a small, 40 year old garage in the backyard of the block of apartments where I live, which I've turned into a workshop. I replaced the roof, and repaired and strengthened the back wall, filled ...
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0answers
106 views

Humidistat relay not working

I have a humidistat that the relay went out that is connected to the Solenoid value. Therefore there is no power available that will open the Solenoid. I'm in the process of purchasing a new ...
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1answer
144 views

What amount of moisture is acceptable in a mostly dry concrete basement?

My basement is generally very dry but I want to know how much moisture is too much, to better prioritize when I need to reduce it. The basement is mostly concrete floors and walls with exposed wood ...
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3answers
375 views

Very low humidity levels in new construction home - over ventilation?

I just purchased a new home in the suburbs of Boston with move in date of November 2017. The home has felt unusually drafty and cold and i've had to increase the heat about 4 degrees above what I ...
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0answers
35 views

Kitchen Installation new build: How long after heat goes on?

In Short Our kitchen suppliers have told us that the kitchen should only go in 6-8 weeks after the heat has been turned on in our new build. Their concern is how dry the house is, I assume the issue ...
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2answers
47 views

What are the specs for the Aprilaire 600 humidity sensor?

The manufacturer replied to me that the humidity sensor used in their devices is "proprietary". They didn't even answer my first question: "is the device based on capacitance or resistance?" In this ...
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2answers
112 views

Where is this wall water damage coming from?

It was raining today. At evening, I notice something's wrong on the wall. Is it a re-pointing issue? The partially damaged wall is only under the windows. I accidentally leave the window open and by ...
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2answers
66 views

Mildew in new apartment [closed]

I am in a newly built apartment. No basement.i see mold on furniture that sits on floor. I have a dehumitifier since Friday. I had it set at 40. In 7 days, I had to empty water 6 times. I then set it ...
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1answer
467 views

New basement cracks found on concrete floor and poured walls after changing and adding one dehumidifier

My home is 14 years old. I have been using a 40 pint dehumidifier at 50% until this spring. It was only after discovering mild amount of mold under my fiberglass insulation that I felt I needed to ...
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1answer
296 views

Meaning of small patches of shallow water on the basement floor

They have been happening now for a couple of months, which may or may not be related to the humid summers in the Northeastern United States. They appear without rhyme or reason, taking up a maximum of ...
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1answer
387 views

Wiring multifunction fixture to 2 switches, 2-wire cables

I'm replacing a fan in a bathroom. The setup I have currently cannot be changed with new wiring. I can add pigtails but I can't run a new 3-wire cable through the chase. Power supply runs to the fan ...
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0answers
67 views

Is it safe to buy hardwood floors from home renovation stores?

Some floor installers have warned me against buying hardwood floors from home renovation stores (box stores) because they claim that the wood is stored at sub-optimal humidity for months prior to sale ...
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1answer
681 views

“Neutral wire required”!

I have a dual switch in my bathroom with two separate controls -- one for the fan and one for the light. It has the following four contacts: Ground (duh!) Two "common" ones, which seem short-...
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0answers
387 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
103 views

How good of a vapor barrier is OSB in a dirt crawlspace?

Some background - I bought my current house in the middle of a drought in 2007, and knew nothing of vapor barriers. The house has a nice, albeit uneven crawlspace, that is walkable for about half ...
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1answer
74 views

is this fungus?

There is water constantly flowing from the balcony of my neighbor on the asphalt and in turn splashing on the wall. There's a huge permanent stain there and looks like something fishy: Is this ...
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2answers
1k views

High humidity in an unused, air-conditioned, finished basement; dehumidifier?

I have a partially finished basement that is connected into my house's 2-ton A/C system. The humidity in the space is consistently high during the summer (60%rh and up), and I believe that this cool, ...
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4answers
1k views

What is a reasonable air-conditioning schedule to prevent humidity issues?

In North Florida (Jacksonville), is there an effective temperature cooling profile to ensure to avoid issues associated with excessive humidity? Assume that I can tolerate any level of heat. Damp-...
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2answers
120 views

Accuracy of humidity sensor

I just had a new Carrier Infinity HVAC system installed in my home, which included the Infinity thermostat. I have a couple of old household thermometer/humidity gauges - one mechanical, the other ...
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2answers
536 views

Bathroom ceiling absorbs moisture and falls apart

After complaining about this, I had a guy repaint the ceiling. There is a window but it doesn't fix what is a damp bathroom. A short 15 minute shower cracked the new repainted ceiling because all the ...
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1answer
133 views

How do I tell if a basement is dry?

I am looking to rent a basement. My purpose is to store documents and clothes, for several years. Hence I need to be sure that this basement is dry, that my documents and clothes won’t be damaged over ...
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3answers
2k views

If it is important to humidify the air in winter for one's health, how then do you prevent condensation from forming on the inside of windows?

The optimum zone of the relative humidity of one's home at any given time is between 40% and 60%. This is the range to ensure that the humidity does not damage one's health or one's furnishings, in ...
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1answer
955 views

Increase humidity with HRV?

I’d like to increase the humidity levels in my old stone and brick house (~120 years) during the winter. Right now it’s about mid-20% and I’d like it to be 30% to 35%. This house came with a HRV ...
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1answer
7k views

Using a humidistat? (humidifier)

I came here to seek a bit of guidance on using my humidistat. I've only owned my home for a few months and have never had a humidistat before. I have a GeneralAire M3 humidistat and was trying to ...
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1answer
93 views

Does cellulose insulation require open windows for venting?

I just added a cellulose insulation into my attic. Yes, I added the rafter vents but I also have two mini windows that are covered with siding window covers allowing the air flow. I normally closed ...
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1answer
66 views

It there a easy way to handle floor cupping?

Bit of a back story. First we rent, but our land lord is awesome. As such, when things around the house need minor repairs, we tend to either just do them, or have them done. Major repairs he does, ...
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2answers
1k views

Portable air conditioner exhaust through door

Dryer & washer outside in a room w/out access to window. Can portable air conditioner be vented/hose used through door when needed?
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2answers
236 views

Help Determine the cause of Cupping Floors

The wood floors in my 1926 Craftsman style bungalow started cupping this year. In some places it is subtle, in some places it is really extreme. Ideas on what is causing it and what could fix it? ...
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2answers
99 views

Is plastic paint a possible solution for a wall with humidity?

I have a wall that often gets wet. It's a very thin wall and I think it's water that somehow just infiltrates. This happens mostly in the rainy season. I am not looking for the ultimate permanent ...
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1answer
370 views

How should I insulate my shed to avoid mold and mildew?

I'm having a 16 by 12' shed built on-site because of difficulties getting down my driveway. It's to be a woodworking shop to build small furniture in. I live in Beaufort SC. It will have cement lap ...
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1answer
212 views

Basement floor is damp and the top of my foundation is cracking after air sealing the attic?

Two months after having my attic professionally air sealed and insulated, the basement floor became damp and the top of the foundation started to show signs of horizontal cracking. Humidity levels in ...
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2answers
664 views

Best way, if needed, to dehumidify storage room?

We are building a new garage with apt above and storage room at the back in Houston TX. It's replacing a small garage with back storage room which was very poorly constructed and had major moisture ...
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1answer
36 views

Will humidity hurt my furniture and paint/fixtures while on vacation? Note: I left a few windows cracked before I left for a week

I am on vacation for a week. I left a couple windows cracked in my 2 bedroom apartment. I also left all the doors inside the apartment open. I thought air flow would be good while I'm gone, but now I'...