laser3kw
Well-known member
Well, cold weather is just around the corner here. Now my attention turns to permanent heat this year. Last year I used a propane bullet heater, it did ok. What I am considering is a natural gas, 95% efficient heater. Mainly, it will keep the garage at 45º and then I would like to jump up to 65º when I am out there for several hours. Floor space is a premium so I would rather have a hanging type. I have searched the internets some and just don't see that type. I do see alot of the 80% efficient, Like the Mr. Heater or Hot Dawg.
The other problem is figuring how big of a heater. The on line calculators suggest everywhere from 23,000 btu to 50,000 btu. Searching th GJ pops up some similar, situations where one person swears by a 45000 btu and another says nothing less than 80,000.
The area I am heating is a 30 x 40. It is divided into a 24 x30 work shop with 10ft walls and attic space above. The other portion is a work bay area, 16 x 30 with 12 foot walls and vaulted ceiling (scissor truss). The walls are insulated with R13 and covered with OSB. The ceilings and attic space are insulated with R30 and covered with dry wall. It is well insulated, I can fire up the propane heater and bring it from 10º to 65º in a matter of 1 hour and it holds it's heat for a couple of hours before it drops below 55º.
I am concerned about moisture, I have metal working machines and materials which I don't want to rust. I figured the closed combustion of a 95% efficient would be best for that.
I am open to all suggestions and share experiences.
Thanks.
The other problem is figuring how big of a heater. The on line calculators suggest everywhere from 23,000 btu to 50,000 btu. Searching th GJ pops up some similar, situations where one person swears by a 45000 btu and another says nothing less than 80,000.
The area I am heating is a 30 x 40. It is divided into a 24 x30 work shop with 10ft walls and attic space above. The other portion is a work bay area, 16 x 30 with 12 foot walls and vaulted ceiling (scissor truss). The walls are insulated with R13 and covered with OSB. The ceilings and attic space are insulated with R30 and covered with dry wall. It is well insulated, I can fire up the propane heater and bring it from 10º to 65º in a matter of 1 hour and it holds it's heat for a couple of hours before it drops below 55º.
I am concerned about moisture, I have metal working machines and materials which I don't want to rust. I figured the closed combustion of a 95% efficient would be best for that.
I am open to all suggestions and share experiences.
Thanks.