Spray Foamed shop-Ventilation question

[LR2019]

Greetings! New to the site. But have been reading for some time. Great site!
I have a 30x50 shop. Just enclosed an additional 14’ lean too. So 44x50. Walls 10’ except for side of leantoo which is 6.5’.
I have removed all of the batt insulation from walls and ceiling. And am having it spray foamed next week. 5” of open cell foam on the ceiling (from top of roof in - metal, then felt/vapor barrier, then OSB) and 1.5” of closed cell on the walls.
Garage is mostly shaded during the day.
I intend to put a couple of mini splits in after the foam but I keep seeing confusing debate on air ventilation. Do I need air ventilation? Passive? Mechanical? Any suggestions? I read where the mini splits will just move air around and not insert fresh air. Is this true?
Also, will prob have my wood stove installed at some point. Will not use often.
Thanks for the help!
Excited in LR.
Cp

 

[kj_mustang]

My building is totally spray foamed with central a/c and radiant floor heat. No system installed to add outside air. I have never had any issues.

 

[LR2019]

Thank you KJ for your response. I hope more can chime in. Seems like there is no real conclusion on this question. But yours is helpful. How long have you had your shop running like this? Do you have a wood stove by any chance?
Thx!
Cp

 

[kj_mustang]

No wood stove and my only combustion source in the building uses a concentric flue pipe so combustion intake air comes from outside. Shop was finished about 4-5 years ago.

 

[Lacenterbrewing]

I read where the mini splits will just move air around and not insert fresh air. Is this true?
Cp

Yes that's true, no duct work with a mini split so no new air.

 

[Lewisthepilgrim]

The idea behind outside air intake is that when a fuel burning appliance turns on, it consumes air.( as well as fuel) The fuel is supplied from the tank, but the air being used must come from somewhere. If your appliance is just sucking air from inside the building, air WILL need to replace that air in the building. This in turn draws COLD air from the outside(through whatever cracks are there) into the building and thus adding to your heating load.

On the flip side, If the furnace DOES have a supply air connection piped to the outside, it will rely solely on the outside air for the air/fuel mixture inside the furnace. And this will leave your already conditioned shop air the same temperature it was before!

If you are NOT using an appliance that consumes fresh air (mini split) you do NOT need (in my opinion) a fresh air intake.

if you are going to have a wood stove, I would definitely hook it up to the outside air intake.

supposedly you are not supposed to have wood stoves in a shop (or any area that stores gasoline or similar flammables...... I picture working on a fuel line and spraying fuel onto the stove.