Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: outdoor
Document: When I pulled my heater out to use it the pilot wouldn't light. I diagnosed my problem to be the regulator, not the control valve. The guy's statement about using a trap (filter) for 20lb tanks is incorrect. If what he said was true why isn't there a trap (filter) on every gas grill, outdoor heater, and any other appliance that normally uses a propane tank other than the 1lb tank?
We just completed our first camping trip using this heater and were very pleased with its performance. The outdoor temperature was in the low 40's, the wind was blowing at 15 with gusts to 20, and it was frequently raining. We brought a fully charged 20lb propane tank and a 10 foot extension hose so we could keep the tank outside the tent. We used the heater for about 10 hours on each of three nights (30 hours total).
It outshined any heater I have used in the past. The temp. dropped to 35 degrees with a heavy frost and I stayed warm with it being set on low. My tent is a 9' x17'. It uses a 1 lb. propane tank every 5 hours, set on low. I will be purchasing the hose for the 20 lb propane tank.Mr. Heater Portable Buddy Indoor/Outdoor Heater - Model# MH9B
Several reviews indicate problems with the Portable Buddy when used outdoors. The manual clearly states that it is NOT for outdoor use. It is suitable for use in outdoor enclosures. This does not mean "open air" usage. Its a heater, not a campfire.When used according to the product manual, it functions extremely well. I have found no need for the recommended filter and have had no problems even after prolonged use and long term storage of the heater. I use it regularly with a 20lb refillable bottle.
this little thing is great! i can feel the heat from 20 feet away. it's like having a portable fireplace.
their customers to make it the new normal. Thank heavens that competition (and the internet) keeps the bar high.
the heater puts out good heat,and convienent, perfect for my conversion van while scouting for fossils on cold days! NOTE Manufacturer strongly recommends using a fuel filter. (which is not included) to my knowledge they are the only person who makes them. They sell for around $10 including shipping, and should be replaced annually.
just got my Buddy, used it my garage with the 3" by 3" vent opening they suggest for Safety. It Works, & it does what it's supposed to do, take the chill out, I read ALL the Reviews, & they were helpfull. Be Carefull with Propane & use responsibly.GREAT Product! Gary P. NY
just  what ive been looking for,safe for indoors no electricneeded uses propane.
i found this item works well and so far I am impressed. it seems to consume the same amount of fuel wheter it is on high or on 1/2 power. I know I will have to buy a few more things in the near future but I have to wait for more money
Answer: I use it on occasion in my garage/shop.    It is safe for indoor use.  The description says "it includes a low-oxygen shut-off switch for safe indoor operation".  The only issue mentioned is not to use large tanks indoors (requires an adapter that is not included to use large tanks).