How much area will 5118 btu cover?

A good size home of about 1500 sq ft would need about 80,000 btu to heat it effectively on a very cold day..the area you live in and how well the place you are heating is insulated will determine how effective 5118 btu will heat any given area...So 5118 btu heater would most likely heat a 100 sq ft room as long as it is closed off and is insulated good. if you figure 80,000 btu will heat a home of 1500 sq ft and the heat will not have to run contuinously..it would take 53 btu to heat 1 sq ft of space...with this in mind you will see that your heat will only run maybe 10 to 15 minutes per hour depending on the outside temperature...the colder it is the more it will run...the warmer it is the less it will run..