how do you cool bathrooms w/ Mini-Splits
- Thread starter mike_s
- Start date
rlitman
Well-known member
Leave the door open when it's not occupied.
Maybe a small fan to help push the cooler air while the door is open.
dave*99
Well-known member
Tjernlund AireShare Room-To-Room Ventilator
Or similar
https://www.northerntool.com/shop/tools/product_200338939_200338939?utm_source=google_PPC&utm_medium=Dynamic%20Search%20Ads%20Test&utm_campaign=Heaters%20And%20Stoves_DSA_Migration&utm_content=&gclid=CjwKCAjw8-LnBRAyEiwA6eUMGvONBRDM5bz9ZthqtdiUhSDJRhKQWCDLpoiDmFDkxJqWuqpi1n_KIBoCXokQAvD_BwE
Or similar
https://www.northerntool.com/shop/tools/product_200338939_200338939?utm_source=google_PPC&utm_medium=Dynamic%20Search%20Ads%20Test&utm_campaign=Heaters%20And%20Stoves_DSA_Migration&utm_content=&gclid=CjwKCAjw8-LnBRAyEiwA6eUMGvONBRDM5bz9ZthqtdiUhSDJRhKQWCDLpoiDmFDkxJqWuqpi1n_KIBoCXokQAvD_BwE
DC73
Well-known member
They also make ducted mini-splits where you can use small duct work to dump air into other rooms.
DC
DC
rlitman
Well-known member
If the mini-split faces the bathroom, such a fan might not even be necessary.
See drawing in original post. Will prob put Mini Split on back wall opposite of garage door. Or might put it above bathroom door (depending on space and access).
rlitman
Well-known member
Gotcha. I wasn't sure if that was a window in the drawing, or which wall is the "back".
I guess, what you end up doing depends on how much you care about the bathroom's temperature, and on it's heat gain/loss.
I put a mini-split in my basement, and ran it for heat this entire winter. It was able to keep the whole basement comfortable even on the coldest of days, but the bathroom was a little chilly on some days.
In my case, the bathroom was rather well insulated, being half underground, and with three walls and the ceiling facing conditioned spaces. If your bathroom is poorly insulated, then it might get stuffy in there. If that bothers you, then a fan might be in order.
kj_mustang
Well-known member
I would put a wall pass through vent high up in the bathroom wall in front of the toilet. The door should have a gap at the bottom when closed. When the bathroom door is closed and the unit is running, convection will cause the colder air to go under the door and hotter air to be drawn out the vent.
Jinks
Well-known member
Make the bathroom wall 6' high.......
LS6 Tommy
Well-known member
Great. Let's blow farts into the shop from the bathroom...
There's a reason bathrooms never have return ducts.
Tommy
JRC3
Well-known member
Most closets that size don't have a register.
I'd almost do a pocket door and leave it open when not in use. A pocket door won't eat up any floor space. A piece of door stop applied to the strike jamb gives privacy covering the crack.
I'd almost do a pocket door and leave it open when not in use. A pocket door won't eat up any floor space. A piece of door stop applied to the strike jamb gives privacy covering the crack.
DC73
Well-known member
I used this concept in my shop. My ceiling is 10' so I made the bathroom wall 8'. As an added bonus, the exhaust fan in the bathroom can help ventilate the main shop.
DC
theoldwizard1
Well-known member
They do, but you loose a lot of efficiency.
DC73
Well-known member
It's not a lot. The new ceiling cassette systems are very efficient and a great choice for some applications.
DC
Bretny
Well-known member
How do you cool your closet in your bed room?
Falcon67
Well-known member
Where it's hotter than hell in the summer, you duct it. Been there done that.
That room circulator thing is the cast-*** IMHO.
b-boy
Well-known member
This looks pretty cool.
I have a utility closet in my basement that houses my boiler and water heater. It's about 10'x15'.
Could I use this to draw heat out of that space into the living space? The room gets very hot in the Winter. My concern would be creating negative pressure in the utility space that might pull CO in from the chimney.
Voi
Well-known member
I have a 640 square foot cabin with only a single head mini split.
My bathroom & mechanical room (about 100 square feet combined) don't seem to get too hot in the summer even with one of the long walls having southern exposure. We just leave the door open except when in use.
The mini split is about 20' away from the doorway to the mechanical area & the entire space extends 12' further away from the wall head.
Not sure if it matters but the entire area is insulated, even the interior walls, due to winterizing concerns.
My bathroom & mechanical room (about 100 square feet combined) don't seem to get too hot in the summer even with one of the long walls having southern exposure. We just leave the door open except when in use.
The mini split is about 20' away from the doorway to the mechanical area & the entire space extends 12' further away from the wall head.
Not sure if it matters but the entire area is insulated, even the interior walls, due to winterizing concerns.
LS6 Tommy
Well-known member
I wouldn't sell a cassette to my worst enemy. They drip, have ****** air distribution/flow, are almost impossible to service...
Tommy
finn
Well-known member
If you find yourself sitting in the bathroom long enough that a slight temperature variation caused by your mini split is an issue, I would recommend you start a Citracell or Metamucil regiment.
Voi
Well-known member
1.5 ton. Average ceiling height about 11'. I'm probably a bit oversized.
Notgrownup
Well-known member
You are over thinking this...passive cool air will cool enough...
Your concern is correct. You should have a CO detector in both spaces regardless. Another Tjernlund product is the Combustion Air Enforcer. It ties in with the burner and only provides CA on a call for heat. The Airshare moves about 90cfm. There is a larger unit that can do more but I don't think your space would require it.
Notgrownup
Well-known member
We have a winner. Plus one on the Metamucil!
LS6 Tommy
Well-known member
Jim greengo
Well-known member
Bath exhaust fan should pull enough air into room when door is closed.
dcg9381
Well-known member
Thank you for this...
dcg9381
Well-known member
Not in more extreme climates, especially if the bathroom has an exterior southern-facing wall.
That1Guy
Well-known member
Agreed!
I was reading the entire thread to see if this obvious answer was mentioned.
Between the bathroom vent fan (vented outside) and the metamucil,
the problem should be covered - lol.
Notgrownup
Well-known member
Agreed, but we don’t know what Mike’s location is. My SIL has a 30x50 Shop with a non climate controlled bathroom and its not that bad...NC can get pretty hot so we’re familiar with the heat.