The "Coleman" single mantle lantern. Uses the small tank or the bulk 20 LP tank. The small attachable tank runs at medium for about 48 hrs. The 20 lb tank requires a propane adapter and hose however runs about a month. It is quiet and puts off about 2 thousand BTU heat. I run it indoors sometimes without any noticable fumes but make sure it is in a larger room or space. The lantern is $20. Propane adapter $4-5. Hose $12-16. Small tank $5. and the bulk 20 lb tank about $40. and varies price to fill it up.
right now propane 20 lb. tank cost me about $15.00 to fill. I consider this lantern which is equal to about 60 watt bulb is essential piece of equipment.