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How to Increase House Humidity?

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  • Jan 25th, 2021 7:01 pm
[OP]
Deal Addict
Sep 12, 2017
1870 posts
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How to Increase House Humidity?

Have a house is the GTA I don't live in. Humidity is nearing 37%. Don't have a humidifier.

Wondering if spilling a bucket of water in the basement concrete floor is a good idea every time I visit the house? Any risk to doing that?

I also left water in the bath tubs, but that does not seem to do much. House is left at 15.5 degrees celsius. I assume this is enough.
13 replies
Deal Fanatic
Jul 4, 2004
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If you don't want to add a humidifier on your furnace just go on Kijiji and buy a humidifier from there. Pretty cheap and some have features like timers and fan speed as well as a humidistat to automatically control humidity levels.
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Oct 16, 2008
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Maple
37% is not low in GTA in winter. High level of humidity may not good for you, mold is growing.
[OP]
Deal Addict
Sep 12, 2017
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teoconca wrote: 37% is not low in GTA in winter. High level of humidity may not good for you, mold is growing.
Thought 50% is the ideal target. What's the best range for winter? My house is new so it is more sealed with a HVR air exchanger.
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Nov 9, 2005
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Got an aprilaire 700 w/outdoor sensor.

Two different HVAC contractors told me 40% is the ideal humidity. House is one year old.
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Oct 16, 2008
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reggyDeal wrote: Thought 50% is the ideal target. What's the best range for winter? My house is new so it is more sealed with a HVR air exchanger.
I would say 35-45% for winter. New house is tightly built but more moisture in the air as it is not dried out yet.
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Mar 21, 2010
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Toronto
reggyDeal wrote: Thought 50% is the ideal target. What's the best range for winter? My house is new so it is more sealed with a HVR air exchanger.
50% is pretty high. Like you wouldn't want it to ever get above 50% in an ideal world.
[OP]
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Sep 12, 2017
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So is throwing a bucket of water in the basement over kill every now and then, if house moisture gets below 35%
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Oct 19, 2020
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When the humidity is too high in the winter, the moisture starts condensing on cold windows as well as where indoor air leaks out/hits cold surface. It's worse when the house is being kept cool, like 16c.

40% is the upper limit for winter in most of canada and when it's extremely cold outside, it should be kept at 20-30% unless you have fantastic windows and the house is well sealed.

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So it's not a good idea to add more humidity; if anything, once the house is occupied and people are showering/cooking, it will may hit 40%++. :)

Hardwood floors and wood work aside, less humidity is actually better for the house.

50% is a good target for summer.
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Apr 11, 2006
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37% and not living there? I think that's fine. 50% is too high. We set our humidifier to 40% because we felt the dryness in our throat and nose when waking up in the morning - that was when it was naturally at low 30-32%.

But even low 30's wouldn't be bad for the house, if you aren't living there. But you're at 37%, which is perfectly fine.
[OP]
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Sep 12, 2017
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So my understanding is to have humidity at 30-40% in the winter and 50% in the summer as good targets?
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Dec 12, 2009
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reggyDeal wrote: So my understanding is to have humidity at 30-40% in the winter and 50% in the summer as good targets?
I try to keep RH at 45-50% in summer. Any higher and it feels like an indoor rainforest. In the winter, RH is kept between 30-40%. Going too high causes the windows to become dehumidifiers.
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Oct 23, 2008
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You have to balance the humidity for the wood flooring as well.

In winter, somewhere between 35 to 45% is the aim. It should be adjusted depending on outside temperature, as too much may cause condensation on cold windows. I'd say somewhere around 40% is good.

Consider a whole house furnace humdifier, it's just easier to maintain overall humidity.
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Oct 13, 2008
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reggyDeal wrote: Have a house is the GTA I don't live in. Humidity is nearing 37%. Don't have a humidifier.

Wondering if spilling a bucket of water in the basement concrete floor is a good idea every time I visit the house? Any risk to doing that?

I also left water in the bath tubs, but that does not seem to do much. House is left at 15.5 degrees celsius. I assume this is enough.
Got no humidifier .... Only the Vava VA-AH012 Ultrasonic Cool Mist Humidifier in our bedroom.

No complaints about humidity here.


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