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Adding windows to warm unheated barn

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Posted by Brent on November 22, 2010, 3:40 pm
 
We use an long well insulated barn (200'x40') for training.  The barn
has 12 24"x24" vents along the side.  These vent's have been closed
with a piece of plywood, but it is not sealed well, and you can often
see light and feel the air movement of air from the openings.

We live in Manitoba Canada, and it get's pretty cold here in winter.
The barn is used once a week, and we heat it to about 5c using propane
heaters, and keep it at that temp for about 5 hours.  Then it cools
down until the next time we use the building.

It seems like we could use less propane if we sealed off these vents.
Probably could add some plastic, insulation, and 25x25 covers on the
inside.

But, was also thinking, i could possible make window frames and
install home made windows along the side of the barn.  (windows like
this but was going to try making double panes
http://www.buildeazy.com/newplans/playhouse_6x6_window_frame.html )

Would adding the 12 windows actually allow the inside of the bulding
to be warmer when not heating?  As well, we would not loose as much of
the heat when we are warming it with the propane heaters.

Any thoughts or advice?

Thanks!

Posted by Josepi on November 22, 2010, 4:12 pm
 
This depends on your propane setup. If your propane isn't properly installed
and vented outside and even if it is, you could be creating a potential
hazard with gas or fume buildup.
Some positive pressure may be required to keep gases from accumulating and
moving to the outside.

I would hope some CO2 detectors and other safety measures would be in order.

,IMHO. seal them up, install some CO2 and gas detectors and an HRV system
for ventilation or leave some of the breathing supply vents alone.

In our large indoor parking for utility vehicles they had huge exhaust fans
at one end and power vents at the other ends. This system would run for 15
minutes before employees got there every morning. Trouble is it froze the
place after heating all night, each morning.



We use an long well insulated barn (200'x40') for training.  The barn
has 12 24"x24" vents along the side.  These vent's have been closed
with a piece of plywood, but it is not sealed well, and you can often
see light and feel the air movement of air from the openings.

We live in Manitoba Canada, and it get's pretty cold here in winter.
The barn is used once a week, and we heat it to about 5c using propane
heaters, and keep it at that temp for about 5 hours.  Then it cools
down until the next time we use the building.

It seems like we could use less propane if we sealed off these vents.
Probably could add some plastic, insulation, and 25x25 covers on the
inside.

But, was also thinking, i could possible make window frames and
install home made windows along the side of the barn.  (windows like
this but was going to try making double panes
http://www.buildeazy.com/newplans/playhouse_6x6_window_frame.html )

Would adding the 12 windows actually allow the inside of the bulding
to be warmer when not heating?  As well, we would not loose as much of
the heat when we are warming it with the propane heaters.

Any thoughts or advice?

Thanks!



Posted by Jim Wilkins on November 22, 2010, 4:23 pm
 
I made polyester film covered inserts for my windows which work very
well. Black tape on the inside reads only sightly cooler than the
adjacent walls. You could tape plastic over the existing windows and
measure relative humidity to find out how quickly the inside air
equalizes with outdoors.

jsw, downwind from you in NH.

Posted by clare on November 22, 2010, 11:15 pm
 wrote:


go to your local window/door guy and get him to save you all the patio
doors he pulls out for replacement. Tempered glass sealed units of
good size, and the price is always right.Generally, if aluminum, they
tear the aluminum off for scrap and trash the glass.

Posted by vaughn on November 23, 2010, 12:29 pm
 

Yep!  When we very expensively replaced our patio door with a hurricane
resistant unit, they smashed the glass and shoveled the glass chips into their
truck.  It made me sick.

Vaughn



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