Hello good people!
Do you have any good tips on how to think about outdoor/supply air vents versus exhaust air vents on the outer wall/roof?
I'm about to install an HVAC unit in my workshop (which is being built very tightly & well insulated, aka. passive house-inspired) and was thinking of running the ventilation through the loose fill insulation and out to two separate ventilation vents on the outer wall - one for exhaust air and one for supply/outdoor air.
Or is it much better to have ventilation vents on the roof? I'm thinking I'd prefer to avoid that to keep the roof as tight as possible.
The workshop, ~ 25 m2, (inventor's room) has 3 m high walls and scissor trusses, and the wall where I plan to mount the ventilation "boxes" is not visible from either the house or any neighbor. So aesthetics aren't very important there.
I'm also wondering how others have done regarding ventilation inside the workshop? Is it best to bring in air from above or below, and what about the exhaust air vents (at the floor, wall, ceiling, or where)?
I have a lathe that might smell a bit "machine-like" (oil, etc.) and a "chemical corner" where I mainly plan to have the exhaust air.
I had an idea to direct supply air down in the middle of the ceiling (it will be 4 m up), and possibly exhaust air in two diagonal corners for good distribution. What do you think?
Best regards,
Stefan Nilsson
Do you have any good tips on how to think about outdoor/supply air vents versus exhaust air vents on the outer wall/roof?
I'm about to install an HVAC unit in my workshop (which is being built very tightly & well insulated, aka. passive house-inspired) and was thinking of running the ventilation through the loose fill insulation and out to two separate ventilation vents on the outer wall - one for exhaust air and one for supply/outdoor air.
Or is it much better to have ventilation vents on the roof? I'm thinking I'd prefer to avoid that to keep the roof as tight as possible.
The workshop, ~ 25 m2, (inventor's room) has 3 m high walls and scissor trusses, and the wall where I plan to mount the ventilation "boxes" is not visible from either the house or any neighbor. So aesthetics aren't very important there.
I'm also wondering how others have done regarding ventilation inside the workshop? Is it best to bring in air from above or below, and what about the exhaust air vents (at the floor, wall, ceiling, or where)?
I have a lathe that might smell a bit "machine-like" (oil, etc.) and a "chemical corner" where I mainly plan to have the exhaust air.
I had an idea to direct supply air down in the middle of the ceiling (it will be 4 m up), and possibly exhaust air in two diagonal corners for good distribution. What do you think?
Best regards,
Stefan Nilsson
Excuse my ignorance but isn't ftx very excessive for 25m2?
I would rather look at these "pax fans" with heat recovery and possibly maybe you can complement with spot extraction or similar if needed.
I guess those 2 solutions don't go hand in hand but if you only run the extraction for short periods, it probably won't really be noticeable in the wallet.
I would rather look at these "pax fans" with heat recovery and possibly maybe you can complement with spot extraction or similar if needed.
I guess those 2 solutions don't go hand in hand but if you only run the extraction for short periods, it probably won't really be noticeable in the wallet.
The garage is built somewhat as an energy experiment (500 mm insulation walls & roof, 400 mm insulation in the slab), so I also want to reuse as much of the energy in the ventilation as possible. 
It's almost like you end up with the slightly philosophical question of whether the extra energy you can recover is worth more than the extra energy to operate the unit.
In such a small room, you only need one supply air and one exhaust air.
In such a small room, you only need one supply air and one exhaust air.
The unit will be demand-controlled in a superior system with triggers for humidity/temp/CO2.
But yes, you're right. Not all parts of the workshop construction will be economically justifiable
But yes, you're right. Not all parts of the workshop construction will be economically justifiable
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