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OIL FURNACE INTAKE HELP

XMAN JR

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Ok i do all my body & paint in a 20 x 30 garage. As you walk in the outside walk in door there is a very small room that i have my oil furnace. 1 the furnace filter gets clogged with sanding dust & i cant run the furnace the same time i run the exhaust fan. I was thinking of running the furnace intake to the outside. Anyone run into the same issue ? Will it work ? Good idea bad idea ? Thanks
 
better with an HRV added in cold climate!
I use to run a 200,000 sq. ft. building with 20 12' entropy wheels on the air handlers they cost a .5 million and saved more than a million!
 
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Hi,

I also have an oil heat. Is your furnace a forced air unit? If it is, you need the return plenum otherwise your are pressurizing the shop rather than circulating air.
The other air intake is for the combustion air and that can be vented to the outside. It's better if the combustion air is cold dense and clean. And you're not forcing warm air up the chimney. And yes, the exhaust fan will cause a backdraft is the furnace is not vented externally. And that sucks!! Soot and CO......

You might have to enclose the plenum/return to separate things.
 
See if you can find a Riello 40 BF burner in you area, a very common burner in the market place, you may have to buy a complete used oil furnace to gain one. They have an inclosed burner assembly c/w a 4 inch combustion air collar. Install unit, install 4 inch insulated venting to the outdoor's, and sealed combustion it is...

https://www.riello.com/north-america/products/residential-burners
 
Mine.. Air in and exhaust out through the same wall venter. No chance of sucking in fumes that go boom this way...
oilfurnaceforshop 049.JPG

oilfurnaceforshop 048.JPG
 
LOL.. Air America.. my favourite movie and my son is/was a projectionist to get me all the good ones.
 
Hi,

I also have an oil heat. Is your furnace a forced air unit? If it is, you need the return plenum otherwise your are pressurizing the shop rather than circulating air.
The other air intake is for the combustion air and that can be vented to the outside. It's better if the combustion air is cold dense and clean. And you're not forcing warm air up the chimney. And yes, the exhaust fan will cause a backdraft is the furnace is not vented externally. And that sucks!! Soot and CO......

You might have to enclose the plenum/return to separate things.
The furnace is like new. Didn't pay much for it. The chimney comes out the top. The fresh air comes in the lower front below the furnace door. Yea I found that out. I cant run the furnace & the exhaust fan at the same time. Thanks for the info
 
If you are painting inside of your shop, you are running an exhaust fan, for fumes and over spray, then you need a make up air system. If you are removing 1000 cfm, you need to supply 1000 cfm of air from outside. If you own a body shop, you have one, a home made or manufactured spray booth in garage, you have to make up the difference. I have a Devibiss booth, and if the booth is on, the large roll up door 10x12 is open at least a foot, opening the panel on the screen entry door is not enough (if you are removing more air than supplying, it creates a negative draft, air will come thru any chimney in your shop). So painting anything when the outdoor temp is below 10 c or 40 f requires some thought.

Dadsbee is there a flange assembly on that furnace, or did you just run the 4 inch flex and terminated it just at the burner assembly?, either way, great idea, and fairly inexpensive..
 
I think the op is talking about plenum air flow being clogged, not combustion side. if the furnace has outside combustion air supply and exhaust [dadsbee} the inside pressure won't affect the furnace combustion. using outside air supply for the plenum through a heat recovery ventilator would cure the problem of airborne particles plugging a filter but the hrv would require periodic cleaning to keep it efficient.
before smoking inside buildings was banned entropy wheels looked like spinning tar honeycombs,and added major labour costs to clean them.
 
Dadsbee is there a flange assembly on that furnace, or did you just run the 4 inch flex and terminated it just at the burner assembly?, either way, great idea, and fairly inexpensive..
I picked this furnace up from another guy that converted to propane. The burner fan/pump comes on, the reed switch detects air flow at the wall venter and then the oil valve opens and the burner lights. The wall venter, the intake air flows around the outside of the exhaust keeping it cool for zero clearance installation. Intake air comes in on the 4" diameter and the exhaust pipe is double layer. it's a 3 or 4" inside that insulated 6" pipe..
oilfurnaceforshop 052.JPG
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oilfurnaceforshop 039.JPG

oilfurnaceforshop 040.JPG
 
I picked this furnace up from another guy that converted to propane. The burner fan/pump comes on, the reed switch detects air flow at the wall venter and then the oil valve opens and the burner lights. The wall venter, the intake air flows around the outside of the exhaust keeping it cool for zero clearance installation. Intake air comes in on the 4" diameter and the exhaust pipe is double layer. it's a 3 or 4" inside that insulated 6" pipe..
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that's very ingenious, works almost like a smog pump,reburn a little of the exhaust particulate
 
I picked this furnace up from another guy that converted to propane. The burner fan/pump comes on, the reed switch detects air flow at the wall venter and then the oil valve opens and the burner lights. The wall venter, the intake air flows around the outside of the exhaust keeping it cool for zero clearance installation. Intake air comes in on the 4" diameter and the exhaust pipe is double layer. it's a 3 or 4" inside that insulated 6" pipe..
View attachment 1020104 View attachment 1020107
View attachment 1020109
View attachment 1020110
I was not aware that aluminum flexiliner vents were allowed on exhaust from oil burners?
 
That furnace looks like an old movie projector without the film reels.
 
Well, I'm old, have not seen a oil to gas conversion, since the 80's. Common thing back in the day. Grew up in Etobicoke, And when I started the trade, there was very few homes still heated with oil. I know we pulled out a lot of old oil fired equipment to install gas appliances. Wasn't until I moved north that oil fired equipment seemed to more common.
Dadsbee, that wall termination is what is called a concentric termination, I was more interested in the other end, where the fresh air is connected to the burner.
 
Well, I'm old, have not seen a oil to gas conversion, since the 80's. Common thing back in the day. Grew up in Etobicoke, And when I started the trade, there was very few homes still heated with oil. I know we pulled out a lot of old oil fired equipment to install gas appliances. Wasn't until I moved north that oil fired equipment seemed to more common.
Dadsbee, that wall termination is what is called a concentric termination, I was more interested in the other end, where the fresh air is connected to the burner.
if you grew up in etobicoke quite likely you'd seen me cruisin in the RR and Belii ! what area were you? I went to ECI !
 
if you grew up in etobicoke quite likely you'd seen me cruisin in the RR and Belii ! what area were you? I went to ECI !
YOU must of knowing donny cloak,he was knowing for his mopars,he had a shop on the lakeshore,i lived in that area at brownsline n horner ave
 
Burnhamthorpe Collegiate, so, Appache Burger, Beatty and Woods, Lakeshore, and then Shaft Road, I always remember seeing some of the newest or hottest car's in the neighbourhood at the Dundas st, DQ.....

With that said, the six degrees of separation..Severn Bridge, Every couple of years, the wife and I, head to Christie Mills for a spa day!!!!!
 
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