Vented Propane Heaters Indoor

propane
colorless gas found in natural gas and petroleum; used as a fuel
Propane is a three-carbon alkane, normally a gas, but compressible to a transportable liquid. It is derived from other petroleum products during oil or natural gas processing. It is commonly used as a fuel for engines, oxy-gas torches, barbecues, portable stoves and residential central heating.
This page provides supplementary chemical data on Propane.
A flammable hydrocarbon gas of the alkane series, present in natural gas and used as bottled fuel

heaters
A person or thing that heats, in particular a device for warming the air or water
(heater) device that heats water or supplies warmth to a room
A fastball
A conductor used for indirect heating of the cathode of a thermionic tube
(heater) fastball: (baseball) a pitch thrown with maximum velocity; "he swung late on the fastball"; "he showed batters nothing but smoke"
A heater is object that emits heat or causes another body to achieve a higher temperature. In a household or domestic setting, heaters are usually appliances whose purpose is to generate heating (i.e. warmth). Heaters exists for all states of matter, including solids, liquids and gases.

vented
Provide with an outlet for air, gas, or liquid
Discharge or expel (air, gas, or liquid) through an outlet
Give free expression to (a strong emotion)
supplied with a vent or vents for intake of air or discharge of gases
(venting) discharge: the act of venting
A VRLA battery (valve-regulated lead-acid battery) is the designation for low-maintenance lead-acid rechargeable batteries. Because of their construction, VRLA batteries do not require regular addition of water to the cells.David Linden, Thomas B. Reddy (ed). Handbook Of Batteries 3rd Edition.

indoor
indoor(a): located, suited for, or taking place within a building; "indoor activities for a rainy day"; "an indoor pool"
within doors; "an indoor setting"
Situated, conducted, or used within a building or under cover
Of or relating to sports played indoors
(indoors) inside: within a building; "in winter we play inside"