A lot of variables in the question you asked. First, you need to convert your square footage to cubic footage. To do that multiply your square footage by your ceiling height. Assuming you have the standard 8' ceilings, your cubic footage is 2000 cubic feet. Also, what is the maximum BTU Output of your heater. Will the heater be the only heat source?
Now, how air tight is this room: fair, average, excellent? Also, is there a door opening(s) to the rest of the interior of the house? Will the door(s) remain opening during times the heater is in operation? Is this room, a bedroom? If it is a bedroom, the maximum BTU Output can not exceed 10,000 BTU's.
If it's not a bedroom and the maximum BTU Output range does not exceed 20,000 BTU's, you should be fine, as long as this room opens into the rest of the house and the door is left open. Higher than 20,000 BTU's will cause a problem.
Keep in mind, these vent-free heaters use interior air for combustion and as far as BTU Output is concerned, more is not better. Because, you are capturing all the heat. Safe placement of the heater is very important. Always keep combustible items at least 3' from the front of the heater. And never near draperies. The back of the heater should be a minimum of 12" off the wall.
Vent-free gas appliances are very safe when used as the manufacturer intended/specified. However, they are not maintenance free and should be cleaned and serviced at least once a year. Not only to maintain proper operation and efficiency, but equally as important SAFETY.
Answers & Comments
A lot of variables in the question you asked. First, you need to convert your square footage to cubic footage. To do that multiply your square footage by your ceiling height. Assuming you have the standard 8' ceilings, your cubic footage is 2000 cubic feet. Also, what is the maximum BTU Output of your heater. Will the heater be the only heat source?
Now, how air tight is this room: fair, average, excellent? Also, is there a door opening(s) to the rest of the interior of the house? Will the door(s) remain opening during times the heater is in operation? Is this room, a bedroom? If it is a bedroom, the maximum BTU Output can not exceed 10,000 BTU's.
If it's not a bedroom and the maximum BTU Output range does not exceed 20,000 BTU's, you should be fine, as long as this room opens into the rest of the house and the door is left open. Higher than 20,000 BTU's will cause a problem.
Keep in mind, these vent-free heaters use interior air for combustion and as far as BTU Output is concerned, more is not better. Because, you are capturing all the heat. Safe placement of the heater is very important. Always keep combustible items at least 3' from the front of the heater. And never near draperies. The back of the heater should be a minimum of 12" off the wall.
Vent-free gas appliances are very safe when used as the manufacturer intended/specified. However, they are not maintenance free and should be cleaned and serviced at least once a year. Not only to maintain proper operation and efficiency, but equally as important SAFETY.