Dual-fuel Systems
Dual-fuel Systems | HVAC Unit Replacement | Heating and Air Conditioning | Sale Creek
In Sale Creek, where crisp mountain mornings can turn into balmy afternoons, HEP’s dual-fuel systems keep comfort perfectly balanced. By pairing a high-efficiency heat pump with a responsive gas furnace, the system automatically shifts to the most economical fuel source, trimming energy bills while delivering whisper-quiet heating and cooling year-round. Our certified technicians size every unit to your home’s square footage and insulation level, so you get precise climate control without waste.
When it’s time for HVAC unit replacement, we make the transition effortless—removing your old equipment, installing the new dual-fuel setup, and fine-tuning airflow in a single visit. You’ll notice lower utility costs, steadier indoor temperatures, and the peace of mind that comes from a 10-year parts and labor warranty backed by a hometown team. Schedule your free estimate today and feel the HEP difference before the next temperature swing arrives.
FAQs
What exactly is a dual-fuel HVAC system and how is it different from a standard heat pump or gas furnace?
A dual-fuel system combines an electric heat pump and a high-efficiency gas furnace in one matched package. In mild outdoor temperatures (typically down to 35-40 °F in the Sale Creek area) the heat pump provides efficient electric heating and cooling. When the temperature drops below the balance point set on the thermostat, the system automatically switches to the gas furnace, which delivers stronger, more economical heat in colder weather. Unlike a single-fuel system, it always operates on the fuel source that costs less to run at that moment, maximizing comfort and efficiency year-round.
Why is a dual-fuel replacement a good fit for homes in Sale Creek, TN?
Sale Creek experiences hot, humid summers and winters that are chilly but not extreme. This “swing” climate lets the heat pump carry most of the heating load during spring, fall, and mild winter days, when electric rates are cheaper than propane or natural gas. On the handful of freezing nights we get, the gas furnace takes over and keeps the house warm without pricey electric resistance strips. Homeowners typically see energy-bill reductions of 20-45 % compared with an older straight-cool A/C plus furnace, and the system also provides high-efficiency cooling (up to 18–20 SEER2) for our summer season.
How does the system know when to switch fuels and will I notice it happening?
A smart dual-fuel thermostat monitors outdoor temperature, indoor demand, and your utility rate settings. When the outdoor temperature falls below the programmed "balance point"—the point where gas heat becomes cheaper or more effective—it sends a signal to shut off the heat pump and ignite the gas burners. The transfer is fully automatic, takes seconds, and is designed to be seamless; you will not feel a temperature dip or hear loud equipment changes. The same controls prevent the furnace from running when cooling is needed, so there is no conflict between modes.
Are there rebates or tax incentives for installing a dual-fuel system in our area?
Yes. Through 2032, the federal Inflation Reduction Act (IRA) offers a 30 % tax credit—up to $2,000—for qualifying high-efficiency heat pumps that form part of a dual-fuel system. EPB and TVA occasionally provide electric utility rebates ($150–$600) for certified heat-pump upgrades, and Chattanooga Gas has furnace efficiency rebates up to $400 for units rated 95 % AFUE or higher. Our team will verify current programs, file the paperwork, and supply AHRI certificates so you receive every dollar of incentive available when you replace your unit.
How do you determine the correct size and model for my home?
We perform an ACCA Manual J load calculation that factors in your home’s square footage, insulation levels, window types, orientation, and air-infiltration rate. From that, we select a properly sized heat-pump outdoor unit and matching gas furnace (often 40–60 k BTU for average Sale Creek homes). Oversizing is avoided because it causes short cycling, higher bills, and humidity issues. We also verify ductwork capacity with Manual D, recommend any upgrades, and present you with 2–3 AHRI-matched system options so you can choose the performance level and budget that fit best.
What does a dual-fuel replacement cost, what is the payback period, and do you offer financing?
A complete dual-fuel replacement—including new outdoor heat-pump condenser, indoor evaporator coil, 95-97 % AFUE gas furnace, smart thermostat, and labor—ranges from $9,500 to $15,500 before rebates, depending on capacity and efficiency. After incentives, most Sale Creek homeowners pay $8,000–$13,000. With typical energy savings of $600–$1,000 per year over an aging 10-SEER A/C and 80 % furnace, payback averages 8–10 years. We partner with Synchrony and local credit unions to provide 0 % promotional APR plans for 18 months or low-interest terms up to 120 months, so you can spread the cost out while enjoying lower utility bills right away.