Need to circulate my heat.

[Joevano]

So my 30' x 30' x10' shop has one crappy, downdraft fan in the center.

I need to circulate the heat properly, but want to do it economically.

How can I figure out how much fan I need? One huge fan is too expensive. Two 56"? Certain accumulated CFM? Is there some formula? All the charts I have found are only for typical room sizes, not this big.

 

[Sureshot]

That is not that big. Why not one 56" with a variable speed control?

What tells you your heat is uneven?

 

[Joevano]

That is not that big. Why not one 56" with a variable speed control?

What tells you your heat is uneven?

Warm at ceiling, cold at floor.

 

[Sureshot]

One fan should be plenty. I have two in my 42x60x16 and they easily keep the heat even barely turning.

 

[Zeke]

Any fan on a stand aimed up will move the air around. You don't want to feel a breeze. Also, check to see where the cold air is getting in and the warm air out. Once you reach the point that your heat supply can't keep up with the loss, you are going to be cold.

 

[DekeT]

Reverse your fan to blow up in the winter.

 

[NUTTSGT]

Before you go spend any money, go grab a 20" box fan out of the house and try that on low.

 

[nickleone]

I have seen small fans hanging from the ceiling with a vinyl tube directing the air down to the floor. It moves the hot air from the ceiling with out it blowing in your face.
Like this but with a light vinyl tube not rigid pipe.
http://www.heatstick.com/_Heat StkBluBox.htm
Or build your own with a few computer fans a power supply and pipe.

Nick

 

[jlckmj]

Why not build a couple of the units described in this thread.

http://www.garagejournal.com/forum/showthread.php?t=231799

They make perfect sense to me, and you would not have a constant draft from an overhead fan. You can find the booster fans here for less that $10

http://www.surpluscenter.com/shop.axd/Search?keywords=fan&page_no=1&page_length=9999

 

[jonathan75]

I use a Vornado fan in my garage that you can tilt straight up. I have it aimed at the ceiling and it knocks that hot air right down fast. The heat evens out real well and I never even feel a breeze. I have one in my house running all winter that circulates the air down from my high ceilings also.

 

[jonathan75]

Why not build a couple of the units described in this thread.

http://www.garagejournal.com/forum/showthread.php?t=231799

They make perfect sense to me, and you would not have a constant draft from an overhead fan. You can find the booster fans here for less that $10

http://www.surpluscenter.com/shop.axd/Search?keywords=fan&page_no=1&page_length=9999

This is actually a really good idea. I might give that a go since I have all the parts laying around doing nothing.

 

[Jackfre]

I would suggest that you look at Fantech's in-line fans. Quality product, easy mounting and with it you will move air but you can also direct air. Worth a look.

http://residential.fantech.net/residential-products/inline-duct-fans/inline-exhaust-fans/