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Propex compact 1600 heater

28-01-09, 17:15
Ive aqquired a propane gas powered propex cab heater which came from a BT vehicle.
It is the older version which only has an exhaust outlet which vents to the outside of the van, There is no air inlet like there is on the newer models (which draw air from the outside to heat) and from what I can see the air inlet is on the unit itself next to the hot air outlet (which puts heat into the van).
Would it be ok to run this in the back of my van with the air for the intake essentially being taken from inside the van?
I would be concerned with the recircullation of potentially gassy air (having no feed of fresh air from the outside)?
Any help/knowledge would be appreciated.:D