Connecting to cold air returns

Connecting to cold air returns

PostBy: bradfr On: Thu Sep 04, 2008 8:26 am

I just recently purchased a keystoker 90 and am ready to install it somewhere in my basement but I am having trouble deciding where. Initially my thoughts were as close to the furnace as possible so the air doesnt have a chance to cool as it gets over to the furnace. This means I would have to set the stove in the center of the basement as opposed to an outside wall. Does it really make a difference where I tie the hot air from the stove into the existing cold air return? Also, how far from the hot air tie into the cold air return should I go to cut in for the cold air return that I am creating for the stove itself?
bradfr
 
Stove/Furnace Make: none yet
Stove/Furnace Model: none yet

Re: Connecting to cold air returns

PostBy: Blackdiamonddoug On: Thu Sep 04, 2008 1:28 pm

put the new stove close to the old and take advantage of the free air flow that you get from stove fan
BBD
Blackdiamonddoug
 
Stove/Furnace Make: axemen 260 rebuilt by Matt
Stove/Furnace Model: stoker AA 260

Re: Connecting to cold air returns

PostBy: WNY On: Thu Sep 04, 2008 2:27 pm

Are you using the built in blower on the Keystoker? or the furnance blower to pull the air from the keystoker. A bit more info would be helpful. do you just have the 6-8" hole in the top of the keystoker for the hot air?
WNY
 
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon


Re: Connecting to cold air returns

PostBy: Mike Wilson On: Thu Sep 04, 2008 2:49 pm

To answer your question, I'd recommend placing the stove as close to the existing furnace as possible.

But, I'm not convinced that connecting a Keystoker 90 to your entire HVAC cold air return is the best way to go. Unless you have a very small duct system, I don't think the 90 would put out enough heat through the 6 or 8" hole on top to provide a significant amount of hot air to your main HVAC return. Furthermore, would not the HVAC fan, if you use it, also strip too much heat off the stove, thus cooling it too much? I estimated that I could probably service 2, maybe 3 registers with warm air from the Keystoker 90, and use a separate closed loop return (from the existing returns, or just create a new, smaller one). Anyone with a 09 have experience with all this?
Mike Wilson
 
Stove/Furnace Make: Keystoker 90 DV
Stove/Furnace Model: Jøtul Kennebec Wood Insert

Re: Connecting to cold air returns

PostBy: bradfr On: Thu Sep 04, 2008 3:02 pm

WNY wrote:Are you using the built in blower on the Keystoker? or the furnance blower to pull the air from the keystoker. A bit more info would be helpful. do you just have the 6-8" hole in the top of the keystoker for the hot air?

I was going to set it up like the liesure line diagram and I am outfitting a jacket to it. There are already 2 large holes(8" dia) but I made a coverplate to be 1" above that and I was going to run 1 8" round duct off of that.
bradfr
 
Stove/Furnace Make: none yet
Stove/Furnace Model: none yet

Re: Connecting to cold air returns

PostBy: bradfr On: Thu Sep 04, 2008 3:04 pm

Mike Wilson wrote:To answer your question, I'd recommend placing the stove as close to the existing furnace as possible.

But, I'm not convinced that connecting a Keystoker 90 to your entire HVAC cold air return is the best way to go. Unless you have a very small duct system, I don't think the 90 would put out enough heat through the 6 or 8" hole on top to provide a significant amount of hot air to your main HVAC return. Furthermore, would not the HVAC fan, if you use it, also strip too much heat off the stove, thus cooling it too much? I estimated that I could probably service 2, maybe 3 registers with warm air from the Keystoker 90, and use a separate closed loop return (from the existing returns, or just create a new, smaller one). Anyone with a 09 have experience with all this?


Well if I am close to my furnace I can run a giant take off, off of the top of my hot air jacket that I made.
bradfr
 
Stove/Furnace Make: none yet
Stove/Furnace Model: none yet

Re: Connecting to cold air returns

PostBy: Mike Wilson On: Thu Sep 04, 2008 3:23 pm

Well THAT would definitely change matters some! When you make up the jacket, post some pictures. I was going to just feed off the 8" hole, but thought about a full jacket... maybe next year. With the jacket, I think you'd have no problem getting enough heat upstairs.
Mike Wilson
 
Stove/Furnace Make: Keystoker 90 DV
Stove/Furnace Model: Jøtul Kennebec Wood Insert

Re: Connecting to cold air returns

PostBy: BIG BEAM On: Sat Sep 06, 2008 10:06 pm

My hotblast has 2-8" holes in the top.I angled them as to get the hot air going in the same direction as the oil furnace does.Then I put in a separate 10" return for the hotblast.My house is a 1500 sq ft drafty old house and it heats fine.The hotblast has 2-550 cfm fans.This is called a parallel system.This way you don't need to run the fan in the oil furnace.These fans draw 5 or so amps and that adds up if you run both.

If you can post a pic of your system it would be helpful.
DON
BIG BEAM
 
Stove/Furnace Make: USS Hot blast
Stove/Furnace Model: 1557M

Re: Connecting to cold air returns

PostBy: BIG BEAM On: Sat Sep 06, 2008 10:10 pm

I just did a search on your keystoker.The fan that comes with it is not big enough to heat a house.Like was said before 2 or 3 rooms at best.
DON
BIG BEAM
 
Stove/Furnace Make: USS Hot blast
Stove/Furnace Model: 1557M