Mr. Heater has their product certified to help guarantee we're always providing the highest quaility product. Those certifications allow us to mark some of our product as indoor safe, however different standards are held for those used indoor in a residence versus those used at a construction site or in a factory, etc.
Residential means that the product is safe to use in your home (if your county/city/state allows). Please review and follow the manual to make sure there is no additional ventilation needed, etc. to use the produt in the safest way possible. For Mr. Heater, that includes the Buddy family and Vent Free heaters.
Commercial means that the product may be used indoors in area that is heavily ventilated like a garage, construction site, or possibly a factory. These locations tend to be more open and have people going in and outside on a more regular basis or they have very limited number of residents, etc. The standard ventilation required is 1 square inch of ventilation for every 1000 BTUs. Some of our product lines included in this category are our Unit, Garage/Shop, and Forced Air Propane heaters.
Please always check your local, city, and state codes to confirm the allowable use of gas heater products. For example, Massachusetts and Canada do not allow the use of propane heaters indoors. While California allows the Buddy series indoors (i.e. your garage or tent) except in dwellings and completely prohibits the use of Vent Free heaters. Most cities do not allow the use of gas heaters in high rise buildings or apartments.
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