Propane Heater Inside

propane
colorless gas found in natural gas and petroleum; used as a fuel
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
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.

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.
A fastball
A person or thing that heats, in particular a device for warming the air or water
A conductor used for indirect heating of the cathode of a thermionic tube
device that heats water or supplies warmth to a room

inside
Situated on or in, or derived from, the inside
relating to or being on the side closer to the center or within a defined space; "he reached into his inside jacket pocket"; "inside out"; "an inside pitch is between home plate and the batter"
the region that is inside of something
(in some team sports) Denoting positions nearer to the center of the field
(in basketball) Taking place within the perimeter of the defense
within a building; "in winter we play inside"