Apologies for the drift away from the OP's gas burner, which I wished I had after my first diesel sooting. Oh well.
I have a 2kw Airtronics Chinese diesel clone in an Econoline because of the condensation issue. When looking at offerings, dimensions are important to get the small 2KW version. Close attention can also get you one with adjustable, programmable fuel pulse settings.
Past experience for decades with diesel/kerosene boilers and heaters and the STANK, nastiness, sooting, and continuing maintenance made me put it off for some time. My initial experience with the Chinese clone verified that disgust. Sooting after hours of use.
After the joys of cleaning a sooted burner and listening to the exhaust, a subtle change in noise indicated beginning sooting. A blast of air into the intake while running would blow "soot boogers" out the exhaust and delay cleaning.
Finally, installing a 16ml fuel pulse pump instead of the supplied 22ml pump, and burning K1 kerosene has resulted in happiness up to 6000 ft. No problem with pump failure due to kerosene yet.
Find many great new & used options and get the best deals for 12V 16ML FUEL PUMP PARKING HEATER 9012868C at the best online prices at eBay! Free shipping for many products!
www.ebay.com
9 amps for the glow plug on startup, .8 amps to run the single motor that supplies both heated air and combustion air.
The addition of a section of flexible duct for my wife's use as a hair blow dryer has increased my maintenance pressures.
I would prefer a miniature propane forced air variety with similar power requirements.