Converting Tri-Burner

 
Hondaracer2oo4
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Posts: 57
Joined: Sat. Sep. 06, 2008 11:35 pm
Location: Hillsboro NH

Post by Hondaracer2oo4 » Mon. Jul. 27, 2009 1:18 pm

Well I ended up getting a Fasco B45227 for the convection air blower. It is a 265 cfm blower and quite a bit larger then the 135 I had on there. So since the fan is physically larger then the original I had to cut a new hole that is offset basically all the way over to one side of the stove and mount the fan there. The problem is it seems to not be able to push the air through the stove! When you plug the fan in and put your hand infront of the stove where the air is suppose to come out its about half as much as what used to come out with the 135cfm fan. If you put your hand over the top of the blower it seems to blow most of its air back out around the top edge of the blower because I guess it can't push it through the stove? What have I done wrong?

 
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BigBarney
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Posts: 1853
Joined: Wed. Feb. 08, 2006 2:48 pm

Post by BigBarney » Mon. Jul. 27, 2009 2:57 pm

These blowers are usually rated at free air flow with no resistance so the

265 CFM is free air flow.When you have to force air through a opening the

resistance of the passage ways determines the output and more power is

required to get the air flow nearer to the rating.Sometimes the flow cannot

be increased much because of the high resistance and limited power of the

blower.

BigBarney


 
Hondaracer2oo4
Member
Posts: 57
Joined: Sat. Sep. 06, 2008 11:35 pm
Location: Hillsboro NH

Post by Hondaracer2oo4 » Mon. Jul. 27, 2009 3:47 pm

Barney,

Thank you for your reply, I think you are very much correct. I called Reading and asked them and they said that they have increased the size of the convection air tubes on the back of the stove which allows the blower to be able to move the air. I took a look at the motors on each. The 265 cfm blower spins at 1400rpm while the 135 spins at 2800. The 265 is a 1/25 hp and the 135 is a 1/30 hp. I tried swapping motors but the 135 did not have the hp to be able to spin the bigger 265 fan. What do you think about me getting a second 135 cfm blower that spins at 2800 rpm and have dual 135 fans. Do you think that would do the trick? Thanks a lot.

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