Yes this unit can be used safely indoors. -GHP
Our heaters are tested up to 5,000 ft. above sea level. We have had customers with success up to 8,000 ft. but we cannot comment on the performance or efficiency past 5,000 ft. -GHP
We do not recommend that because of clearances. -GHP
It is designed for patio use and would do well in 40 degree weather. -GHP
Yes there only has to be 17 inches of clearance above the unit. -GHP
Effective but we make sure you read the manual and note proper clearances. -GHP
No, a regulator is not needed with a 20 or 30-pound tank.
The video attached in the "photos" even states it is compatible with 1lb cylinders and last up to 3-3.5 hrs ... why is not compatible then?
It has an oxygen depletion sensor that is designed to cut the device off if the inside air gets dangerous. I would and do still use a carbon monoxide detector when it’s I use as a double check and extra margin of safety. So yes, unless local or state laws in your area do not allow the use of an unvented propane device in your residence, you can use it in the house. Best use for it inside would be for emergency use, not as a frequent use space heater due to the expense of the propane. It is more economical if you buy the bulk tank adapter hose and use a 20 lb grill tank.
Hello Speedracerjoker, the vapor to liquid propane ratio is different in the 40 lb. tanks and has a different pressure output, the heater is only designed to work with 20 lbs. tanks maximum and attempting to use a bigger tank my damage the unit and pose a safety hazard. -GHP Group Customer Support