We’ve Got Energy Efficient Furnaces to Keep Your Family Warm All Winter A furnace shouldn’t conk out on you in the middle of our Indian River County winters. In fact, at Custom Air Systems Inc, we know you deserve a furnace that is energy efficient, runs quietly and helps reduce your utility expenses. Our selection of ENERGY STAR® qualified Lennox® gas and oil furnaces, which have met EPA guidelines for energy efficiency, will do just that. Our furnace series feature Lennox ingenuities like variable speed motors and PreciseComfort™ technology and work smarter, not harder, to provide consistent heat with more energy efficiency. Fewer temperature swings. More comfort. More saving. Sounds pretty great to us. Each of our energy efficient furnaces are a solid choice for your Indian River County area home. They can enhance humidity control and air filtration, giving you improved indoor air quality. With a Lennox furnace from Custom Air Systems Inc, you can stay warm on even the coldest days. Browse our energy efficient gas and oil furnaces to learn more. Gas Furnaces Oil Furnaces We’re experienced and ready to help with any of your heating needs, whether it’s a furnace replacement or a furnace repair. Simply give Custom Air Systems Inc a call at 772-571-1080 or schedule an appointment online to get started.