Propane heat is basically the same as natural gas for home heating and cooking. On Cape Cod, natural gas is only available up through Eastham, beyond that your choices are then oil, propane or electric for heating. In general, propane and natural gas have been more efficient and less expensive than heating with oil or electricity. Additionally propane burns cleaner than oil and leaves no detectable odor when burning, It is recommended to have a propane furnace serviced at the same intervals as a natural gas furnace, generally every year or two depending on recommendations by furnace manufacturer. You should have the unit inspected thoroughly by your home inspector, especially if it is older, to make sure it is in good working order and has proper venting. Massachusetts requires all homes to be equipped with carbon monoxide detectors so that in the event of a problem it would be detected. FA Days Propane is a local provider here in town and could answer any other specific questions that you may have (508.487.0041). So yes, propane is very safe and efficient.