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Forum topic by hig789 posted 11-23-2016 03:46 AM 536 views 0 times favorited 8 replies Add to Favorites Watch
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hig789

39 posts in 679 days


11-23-2016 03:46 AM

Had a question about using a ventless gas heater in the shop. My shop is about 15×20 and we had a ventless gas heater that was in the house when we moved in that we don’t use so I thought I’d move it down to the shop to heat it. My brother in law works for the local gas company so he trenches me a line down to the building last summer. Would this be safe to use or should I look for a vented one that’s sealed? This one doesn’t have the glass in it so the flame is exposed.

I work at a grain company so we’ve been through all the safety training on dust explosions so I guess that’s what has me a little worried about using it.

Here a picture of it. Thanks for any advice you can provide.

EDIT: I will be insulating the whole building the best I can and be running a dust collector like the one below on everything except the table saw. Until I can figure out a way to do it on my Craftsman.

http://www.rockler.com/new-dust-rightreg-wall-mount-dust-collector


8 replies so far

View gmc's profile

gmc

47 posts in 1994 days


#1 posted 11-23-2016 11:39 AM

I had one in a previous house and it worked fine. I added a blower motor to it and it kept a four car garage in central Illinois just fine. Mine had the open flame and was ventless so it sounds like the same type of heater.

-- Gary, Central Illinois

View Fred Hargis's profile

Fred Hargis

4758 posts in 2331 days


#2 posted 11-23-2016 11:50 AM

My experience was different than Gary’s. I’ve had 2, and while I don’t think you have a safety problem there are some other downsides. For safety the dust would have to be extremely thick to explode, though it can settle and clog orifices and such. Every one of these I’ve had and seen have a sensor to shut them off if the O2 levels get too low, so I think they are safe. But they generate a ton of moisture that will condense on any cold surface. In my case it was the roof decking in what was my garage shop at the time,,,,so much that water was actually dripping from it. The second issue is the odor. I suspect you can get used to it after a while, but it is (to me) quite objectionable. I suggest you get a vented heater from the getgo.

-- Our village hasn't lost it's idiot, he was elected to congress.

View dbray45's profile

dbray45

3295 posts in 2614 days


#3 posted 11-23-2016 01:28 PM

If you are going to use the terms gas and “vent less” in the same sentence, I would hope that you include CO sensors at the ceiling and floor. Just sayin

Vented everything is a good idea

-- David in Damascus, MD

View JBrow's profile

JBrow

1274 posts in 758 days


#4 posted 11-23-2016 02:42 PM

hig789,

I am not sure what vent-less means but I have an idea of the features I would like to see in a workshop gas heater. These would be that the unit is sealed from the heated space so that no air in the workshop can make its way into the ignitor, burner, sensors, or other parts that regulate and control combustion (thermostat obviously excluded). This probably means combustion air is drawn in from outdoors. It would be a nice gas-saving feature to use a unit that does not have a standing pilot light. Also venting flue gases to the outdoors would help control humidity in the shop, as mentioned by Fred.

From a safety standpoint, I agree with Fred. The ratio of oxygen to wood dust in the shop air is unlikely to ever reach the point where an explosion could ensue. But I can image a circumstance where a piece of wood falls or is placed too close the heater and, called away from the workshop, the heater is inadvertently left on and the wood left in contact with the heater. If the heater is carefully placed in the workshop, perhaps this accidental circumstance can be avoided.

View paratrooper34's profile

paratrooper34

915 posts in 2789 days


#5 posted 11-23-2016 03:06 PM

I built a mancave a couple of years ago and planned on heating it with a ventless heater like this. Got it plumbed, had it working and then it broke (some kind of regulator issue). So I returned it and there was no replacement in stock. So I went home and looked into these things a little closer. I was trying to see if the unit had other issues with the regulator and to see what others said about them.. What I found was lots of people complaining about health issues from having those heaters in their homes. Others complaining about the smell. After reading all those, I ripped out the gas piping and covered the holes. No freaking way will I ever have one of those in my house. My advice is get something that is vented.

-- Mike

View hig789's profile

hig789

39 posts in 679 days


#6 posted 11-23-2016 03:07 PM

I know it doesn’t put very much carbon monoxide so I’m not worried about that. My brother in law brought his little sniffer machine and checked it out. It wouldn’t even register a CM level after it was on high for a hour in a small sealed room.

As for the condensation, that’s the main problem I have read about also. I might just use it for now and keep my eye out for a vented one in the near future.

View dmo0430's profile

dmo0430

56 posts in 840 days


#7 posted 12-20-2016 10:06 PM

I have one in my 2 car with no issues. Not even moisture. I don’t run it a lot only when I’m in the garage and even at the extreme cold that we had this last week (central IL also) it wasn’t bad. I have a homemade air cleaner with a squirrel cage in it. I always turn that on at least on low with the fan so I’m not sure if that stops condensation from grabbing the tools or what. I also keep all my metal surfaces waxed. Helps the wood slide and prevents moisture.
Just a thought.
You could always use it and save for something else.

View hig789's profile

hig789

39 posts in 679 days


#8 posted 12-20-2016 10:29 PM



I have one in my 2 car with no issues. Not even moisture. I don t run it a lot only when I m in the garage and even at the extreme cold that we had this last week (central IL also) it wasn t bad. I have a homemade air cleaner with a squirrel cage in it. I always turn that on at least on low with the fan so I m not sure if that stops condensation from grabbing the tools or what. I also keep all my metal surfaces waxed. Helps the wood slide and prevents moisture.
Just a thought.
You could always use it and save for something else.

- dmo0430

I’m in KY and with all that rain we had in the past few weeks and the extreme cold the past few nights I had it running a few nights in a row. I noticed last night that there was a fine film of rust on my table saw. I used the Johnson paste wax on it but I guess it wore off. But I hadn’t used it before in a while so I’m not sure what’s going on with it.

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