Ventless heater reccomendations

[madlabs]

Hi All,

Winter is coming! Pretty cold in the mornings already. So,it's time to get a heater for my new space.

I am living in a 35' trailer, off the grid. I'm in Northern CA, so we get frost about 20-30 days a year, but that's about it.

I am looking at ventless heaters. I have read the warnings, so I will have my own CO and ODS sensors as well as the ODS on the heater. I will follow the venting reccomendations as well. What I'd like is some help with the following questions:

Blue flame or Radiant? I'm leaning towards blue flame, although they aren't legal in CA.

What Brand I want a high quality unit, no cheapies.

What Size? It's a small trailer. I'm thinking 6000 to 10,000 BTU's.

Thanks for the help!

Jonathan

[hiker]

used one for years in my house-living room-

i liked the radiant heater the best--seems to throw the heat out farther..

burns cleaner than the flame type...had a co2 monitor it never did go off..

buy one with a built in thermostat...then set it and forget it....

hmm .. seems ive heard that phrase somewhere.....................

[madlabs]

What brand and size are you using?

Jonathan

[greend88]

Here's some BTU/hr figures for a 35'x10'x7'tall trailer.

35*10*7=2450 cu/ft              

Formula ( Btu/hr=Cubic Feet of air * Insulation)

 Insulation = (.2 = Excellent, .4 = Average, .8 = Poor, 2 = No Insulation.)

2450*.2= 490 btu/hr per degree Fahrenheit. That's for excellent insulation. Little to no leakage.

2450*.4= 980 btu/hr per degree Fahrenheit. For average insulation, average Leakage.

2450*.0.8= 1960btu/hr per degree Fahrenheit. For Poor insulation, loose leakage.

There's about a million other ways to figure this out too but gives a general idea of whats needed.

Lets say you have average insulation. So if you need a 30 degree temperature difference then you take 30*980=29,400 btu/hr.  So for 32*F - 62*F that's how many btu's you would need. I would say at least need a 18,000 Btu/hr heater.

But if you have REALLY good insulation you could get by with: 490*30= 14,700 Btu/hr.

But if it was me I'd get at least a 18,000 Btu/hr one.