Fresh air supply for Koker

Fresh air supply for Koker

PostBy: homesaver On: Thu Nov 04, 2010 8:33 pm

Fired up the stove on Sunday. Super impressed with how the installation turned out. I wanted a fresh air intake though because I dont want the heat being sucked out of the basement and you may be surprised at just how much air that little combustion fan draws.

Well, I just installed the intake tonight and the internal temp of the firebox went up about 20 degrees and the air chamber about 10. So I guess the thing was starving for air. I've posted some pics of the installation.

So, all it took was about $30.00 and the following materials.......a dryer vent kit at Lowe's, one 4' length of 4" PVC, one 4" PVC cap, one 4" to 3" aluminum reducer and an expandable length of 3" aluminum dryer vent pipe some silicone and a dab of mortar.

After removing the flap door and attaching the included screen I stuck the 4" dryer vent pipe which is attached to the vent hood through the PVC and allowed the PVC to protrude 1" into the room so the 4" PVC cap fit on to seal the hole for summer. Sealed the hood to the outside wall with good old silicone and mortar on the inside.

Time will tell if this works as well when its below zero outside, but I really think this is the ticket. When I disassemble the parts for cleaning in the spring, I'll probably do something different with the wire connections to the feed motor so there not in the way.

Comments welcome!
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homesaver
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker 160k BTU

Re: Fresh air supply for Koker

PostBy: GeorgiePorgie On: Thu Nov 04, 2010 9:05 pm

To do it better, you need to insulate the flex duct, so the surrounding area does not lose its heat when the outside temperature drops, with the air temperture dropping, it will be like holding a big ice stick inside the house.
GeorgiePorgie
 
Stove/Furnace Make: Alaska, Harman, Keystoker
Stove/Furnace Model: Stoker

Re: Fresh air supply for Koker

PostBy: LsFarm On: Thu Nov 04, 2010 9:14 pm

Good job! You may also notice fewer drafts around the windows and doors.. it sounds like your fan was pulling a slight vacuum on the house..

A screen over the inlet, if it doesn't have one is a good idea,, mice and squirells are currious..

You may get some condensation on the pipe in really cold weather, and like mentioned above, a wrap of insulation will fix that..

Greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

Visit Lehigh Anthracite

Re: Fresh air supply for Koker

PostBy: homesaver On: Fri Nov 05, 2010 7:56 am

Thanks for the replies.

I am planning to wrap the inlet pipe, just havent got to it yet.

Alreday notice the slight sulpher smell in the basement is gone!
homesaver
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker 160k BTU

Re: Fresh air supply for Koker

PostBy: homesaver On: Sat Nov 06, 2010 10:07 pm

Insulated the pipe with fiberglass then wrapped it in foil tape. All is well now.
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homesaver
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker 160k BTU

Re: Fresh air supply for Koker

PostBy: k9 Bara On: Sat Nov 06, 2010 10:35 pm

Great Job! :) I really like it, nice work.
k9 Bara
 
Stoker Coal Boiler: EFM
Coal Size/Type: Rice Anthricite

Re: Fresh air supply for Koker

PostBy: poconoman On: Mon Nov 08, 2010 11:14 am

Is the exhaust vent far enough so fumes won't come back in? Pics?
poconoman
 
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: Hyfire II

Re: Fresh air supply for Koker

PostBy: jrn8265 On: Thu Nov 11, 2010 7:18 am

I have a koker and want to do the same things. Can you show a pic of how you mounted the hose to the koker? Thanks!
jrn8265
 
Stove/Furnace Make: Keystoker Koker
Stove/Furnace Model: Koker 160

Re: Fresh air supply for Koker

PostBy: TAMNOZ On: Mon Nov 15, 2010 10:45 pm

Homesaver,
Your pics don't show what happens to the pipe when it gets to the stove. I'm new to this whole coal thing, I fired up my new Koker Sat. nite and when I woke up for an Ambulance call at 12:30 found my basement to be quite warm. So I opened the upper half of my basement door to let some of the heat come up the steps. Is your house that air tight or what I'm not sure I understand.
Jim
TAMNOZ
 
Stove/Furnace Make: KEYSTOKER soon
Stove/Furnace Model: Koker

Re: Fresh air supply for Koker

PostBy: LsFarm On: Mon Nov 15, 2010 11:04 pm

Hello TAMNOZ..

If there is air going up the chimney, or out a powervent, then there has to be fresh air replacing it in the house... So, do you want the fresh air to come through all the gaps around windows and doors, or from a single source, that doesn't cool off the heated house?? The fresh air supply provides a dedicated location and route for the fresh air to get from outside to the combustion blower in the Koker..

Providing an outside air source greatly if not completely eliminates drafts around windows and doors, air being pulled through poorly sealed outer walls and elecritcal outlets.. the overall effect is to improve the insulation and sealing of the whole-house envelope..

Providing a pathway for the heated air to circulate through the house is another matter entirely.. there are dozens of threads on this subject on the forum.. use the search function to find plenty of reading on the subject.

Greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

Re: Fresh air supply for Koker

PostBy: homesaver On: Tue Nov 16, 2010 11:47 am

Sorry guys, I've been very busy (busy season for us chimney sweeps) and havent been reading the posts until now so I'll try to answer some questions.

The last post by Greg L explains why I did the fresh air intake (wery well said sir!) and yes, my house is only 5 yrs old and pretty tight. My brother sells Keystoker and we had discussed a fresh air intake several times. His concern was having cold outside air directly feeding the fire might "cool" the fire. Actually the exact opposite has occoured. Looks like the fire was starving for oxygen. It burns so well now that I only have to pins left (in each of the 3 groups) on the timer and still have the 2" of hot coals on idle. I may get it down to just one.

The fresh air intake is about 5' lower than the exhaust which is around the corner. The prevaling wind blows the exhaust away from the side of the house the intake is on, but it really would not matter much if at all if it were a lot closer. if any exhaust was to find its way to the intake area, it would be sucked into the intake and sent right back through the combustion blower and back out the exhaust. No more fumes in the basement, no more heat loss in the basement. Its 80 degrees down there right now with just the radient heat from the unit.

As for the way the duct is attached....well, it really isnt. I just have it stuck near the intake fan for the combustion motor and theres so much suction it just sticks to the wall with no need for an attachment! This is a perfect example of how much vacume the cumbustion motor creates.

As for heat circulation, I have the plenum connected right to the A/C distribution duct which has 7 registers throught the downstairs. I also have 2 "gates" installed in the ductwork for summer and winter operation. I have an access door on the return duct which when open allows the air to return through the return registers to the basement for perfect circulation without having to have the basement door open.

So far the temp upstairs (2nd flr) is only 2 or 3 degrees below the temp downstairs (1st flr). I have no vents going upstairs. Its just heat rising through the stairway.

If theres anything else anyone would like info on, please email me at mark@homesaverchimneysweeps.com.

Finally, I just fabricated a proper funnel to get the coal into my basement. See below .........
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Last edited by homesaver on Tue Nov 16, 2010 7:49 pm, edited 5 times in total.
homesaver
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker 160k BTU

Re: Fresh air supply for Koker

PostBy: homesaver On: Tue Nov 16, 2010 11:48 am

Oh, the funnel comes apart for easy storage with just a few screws.
m
homesaver
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker 160k BTU

Re: Fresh air supply for Koker

PostBy: Vernoncoaler On: Wed Nov 17, 2010 6:26 am

Did you move the placement of the flap that restricks the amount of air flow into the combustion blower or did you leave it alone?
Vernoncoaler
 
Hot Air Coal Stoker Furnace: Keystoker Koker
Coal Size/Type: Rice
Other Heating: Propane Forced Air

Re: Fresh air supply for Koker

PostBy: homesaver On: Wed Nov 17, 2010 8:01 am

Left it alone. Just checked in on the stove and its still working perfectly.
homesaver
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker 160k BTU

Re: Fresh air supply for Koker

PostBy: homesaver On: Sun Nov 21, 2010 10:01 am

Stove is still running like a fine swiss watch. Here's some final pics which may help answer some questions........
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homesaver
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: Koker 160k BTU

Visit Lehigh Anthracite