Backup Heat Source- 100 pound propane tank?

How is using outside air for combustion in a vented furnace any safer than using room air? It can't create an oxygen shortage, since there is no way for the furnace to selectively reject nonflammable constituents back into the room.

It's my understanding that furnaces are sometimes equipped with an outside air intake port to make the house more comfortable. If combustion air is drawn from the room, cold outside air has to be drawn through exterior walls into the living space, which creates cold areas near corners.

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IDee 100% we eat Ranch eggs, Milk Cows for Whole milk ,(Natural), and have used Ventless Heaters for 7+ years as primary Heat Source, yes in Winter we crack a window , we stay toasty and Safe ,maybe with Doggy door as well supplies plenty of Fresh air. In a power outage many of our neighbors wish they had our Ventless Heaters . We do maintain them, keep them dusted .clean and watch for Blue flame, it gets other colors like orange or Yellow constantly that is, shut them off , clean and fire right back up with clean blue flame,keep in mind the color can vary some, but just remember how the flame looks when brand new . All heaters have to be maintained ,not an issue with just one type heater but all. Our tank ofcourse is outdoors, we have decent insulation, this is important . Have a Toasty Safe Winter,

We do, as do lots of other people, especially in older houses.

We also have an unvented gas heater designed to look like a "fireplace/woodstove", and another radiant type.

Used PROPERLY they are perfectly safe

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This is what I have, it is one of the models with a blower, so it does use electric, but it "works" when the power is out. It just is a propane hog without the blower.

I've put in a wood fireplace insert to hopefully spend less for heat this winter.

I lived with a ventless propane heater as my primary heat source for 3 winters in northern Nevada. We had a handful of sub-zero nights each year, but we stayed warm. I got mine at eBay for about $125 delivered. It worked a lot better than our previous Kerosene heater because the propane heater had a thermostat, and our clothes didn't smell of kerosene fumes.

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I use ventless heaters...
But usually at least one door is wide open... and usually several, and at least a handful of windows.

I'd not want to rely 100% on ventless heaters, and have an airtight house.

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That's what the CO detector is for. You don't want to go ventless without one. But honestly, leaving a door wide open in sub-zero weather isn't really an option.

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Zombie thread!

Yes that is for sure but you wouldn't get me to live in a house with one of those. Ventless one that is. Period.

Do you know something specific about ventless heaters that makes you not want to be around one?

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I use a propane wall furnace as supplemental heat in my bathroom, and it has worked very well. As for the tank, if you could possibly get home delivery, it might be worth your while to find/buy a good, used 250 gallon tank (maybe Craig's List). That way you could avoid hauling the tank, and I believe you might get a better price on the propane (but with propane it's somewhat difficult for me to compare gallons to pounds and figure out how I'm coming out price wise...but I do know that filling small grill bottles is much higher on average than my big tank.)

Good luck and stay warm this Winter.

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