Extra economical models are needed inside the U.S. North location mainly because of the colder weather and increased quantity of heating diploma days. FEMP's acquisition guidance for household furnaces and the linked ENERGY STAR performance needs implement to natural gas, propane, and oil-fired furnaces with heating capacities below 225,000 Btu/h. https://energy-management-austral65207.bloguetechno.com/the-basic-principles-of-energy-purchasing-64930907