Just a heater shot -
I've got a Big Buddy heater and Buddy heater, smaller version of the big one..When the big one went kerflotz (be sure to use a filter if you're using propane from the big tank - took 5 years but I found out why
) I just switched over to the little one and took a look at the two.
The only real difference was the higher heat setting of the big one, which I never use and the fan 'feature'. Well, I never really cared for the fan anyways, if worked good to move the warm air sround, but it used 6 D cells that last a night or two - gets expensive - or an AC adapter, which meant I had to run the inverter all night just for that. Didn't care for that option much either. i had a couple of 12 volt computer fans mounted to the shelf about 10" from the ceiling that moves the warm air around fine, used less juice and ran off the normal battery bank.
I took the fans down when I was painting and rather than put them back up I decided to see if they'd work mounted on the little heater, just like the fan on the big heater. So I lashed 3 of them together with a piece of aluminum strap across the bottom in the back and screws in the regular mounting hole on the fan to attach to the handle of the heater and it wound up like the picture.
For those with visions of Mrs. O'Leary's cow, I didn't just slap all this together, light it and head for the mall ..
This is even more boring than my usual tripe, but -
In operations the heater/fan combo is in one of 4 conditions, all easy to test for to prevent grisly morbidity and immolation -
1) Heater off, fans off
2) Heater off, fans on
3) Heater on, fans off
4) heater on, fans on
The first two conditions present no hazard and can be ignored.
#3 Before I mounted the fans I felt the spot where they would touch the heater (in the mnorning after the heater had been on all night) and it was warm to the touch but not hot.
So far so good.
#4 Mounted the fans, lit the heater, plugged in the fans. Over four hours, checked the fans from time to time to see if anything got too hot that wasn't supposed to. Nothing did.
Months of use, no problems.
Oh, just an additional thing - the big heater was a 20 buck/30 minute repair, the regulator was full of oil, stuck in a new one. Good customer service at the Buddy heater place.