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Old 09-22-2015, 06:27 PM   #1
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How much is 120k BTU?

I just bought a military surplus heater that had 4 hours on it. It is multi fuel. Kero, Diesel 1 and 2, JP-8 and I think No. 2 fuel oil? Is this too big for the bus? It requires 110 volt to operate.


http://www.cyberviewsolutions.com/eb...0CG_manual.pdf
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Old 09-22-2015, 06:51 PM   #2
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We used something similar in our warming shelters on Brick after Sandy. They got a 12x10 tent overly warm, but you do have to watch out for CO.
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Old 09-22-2015, 07:06 PM   #3
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when i did the math for my bus, i thought i was gonna need about 30k btus... that heater is on the big side


i used this calculator when sizing my heater

http://www.builditsolar.com/Referenc...s/HeatLoss.htm
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Old 09-22-2015, 07:56 PM   #4
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Think of it as how much AC do you need? most RVs use 2 12k BTU units therefore 24K BTU. If you are somewhere that gets cold bump it up a bit and if you are some place warm drop that number a bit.
I looked at that manual you have listed its blower does 1000 CFM on the throughput. Figuring you bus is a 7.5x37x6.5 rectangular cube it has a volume of 1800 cubic feet meaning on average that the entire volume of the bus is exchanged every 2 minutes. Now if you want to heat up wedding marquees that is a different story.
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Old 09-22-2015, 09:03 PM   #5
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OK. Thanks for all the input. I didn't pay an arm and a leg. Maybe I will use it for something else or sell it. The military paid some crazy amount like $6-7000.
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Old 09-23-2015, 07:47 AM   #6
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crazy, set it outside and duct the heat to the bus. you can heat the bus and your grilling/beer area!
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Old 09-23-2015, 09:01 AM   #7
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Sweet heater! At first glance I thought it was glorified salamander style diesel heater, but I then saw it has an exhaust stack. Very nice. That thing would be nice for us folk during the truly cold winter months. It'd bring the bus from below freezing to comfortable quickly.
As far as BTUs go, the drivers side heater in my bus is rated at 80,000 BTU. I also added a small heater core and fan which points down at my lady's feet, but the bus heater does 95% of the work while going down the road. It has never had a problem keeping up. Even when it's been -30c outside. There were two other stock heaters (40,000 BTU and 60,000 BTU, if I'm remembering correctly), but I removed them.
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Old 09-23-2015, 01:15 PM   #8
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It uses mucho fuel. Probably more than I am prepared to pay for. I think I read more than 1 gallon per hour. That's OK to keep our soldiers warm but too rich for my blood. I also have two Espar ( Webasto style ) heaters. One is 12 volt coolant and the second is 24 volt air. I will probably use one of those. I think they use about 1 gallon every 10 hours. We will see after I pickup the Camfire. Who knows, maybe I will get married again so I can use it to heat up my wedding marquee.
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