Dual-fuel Systems
Dual-fuel Systems | HVAC Unit Replacement | Heating and Air Conditioning | Strawberry Plains
When temperatures swing from crisp Appalachian mornings to sizzling Tennessee afternoons, Strawberry Plains homeowners turn to HEP for reliable comfort. Our dual-fuel systems intelligently switch between an electric heat pump and a high-efficiency gas furnace, delivering whisper-quiet heating and cooling while slashing utility costs. Because the equipment automatically chooses the most economical fuel source, you enjoy steady indoor temperatures without the sticker shock—no more guessing which system to trust when the weather can’t make up its mind.
If your aging equipment is struggling to keep up, schedule an HVAC unit replacement with our factory-trained technicians. We’ll size your new dual-fuel system to fit your home, remove the old unit with care, and have you up and running the same day in most cases. From transparent quotes to industry-leading warranties, HEP keeps Strawberry Plains comfortable, efficient, and worry-free all year long.
FAQs
What is a dual-fuel HVAC system and how does it work?
A dual-fuel system combines an electric heat pump with a gas (natural gas or propane) furnace in one integrated package. The heat pump serves as the primary heating and cooling source, delivering efficient electric heating in mild weather and high-efficiency air conditioning in summer. When outdoor temperatures drop to a pre-set “balance point” (usually between 30 °F and 40 °F in Strawberry Plains), the system automatically switches to the gas furnace, which can produce warmer supply air more economically in colder conditions. This automatic switchover maximizes comfort and energy savings year-round.
When should I consider replacing my existing HVAC unit with a dual-fuel system in Strawberry Plains?
Replacement is recommended if your current heat pump or furnace is 10–15 years old, requires frequent repairs, or struggles to maintain set temperatures. Homeowners in Strawberry Plains often choose dual-fuel when they want lower winter heating bills, improved cooling efficiency, and the flexibility to use electricity or gas depending on energy prices. An HVAC professional can perform a load calculation, examine utility-rate trends, and determine whether a dual-fuel upgrade will provide a meaningful return on investment for your specific home.
How much can I save on energy costs by installing a dual-fuel system?
Savings depend on the size of your home, insulation levels, and local electric and gas rates. On average, Strawberry Plains homeowners see 20 %–35 % lower heating costs compared with an electric-only heat pump and 10 %–20 % savings compared with a gas-only furnace/central AC pair. The heat pump covers up to 90 % of seasonal heating hours at a fraction of the cost of gas, while the furnace handles the coldest 10 % efficiently. Payback periods typically range from 4 to 7 years when replacing equipment that is 12 years or older.
What size dual-fuel unit do I need for my home?
Proper sizing depends on Manual J load calculations that factor in square footage, insulation values, window types, orientation, and air infiltration. Oversized units short-cycle, decreasing comfort and efficiency; undersized units run constantly and wear out early. A certified HVAC contractor will collect home data, use ACCA-approved software, and recommend the correct tonnage (typically 2–5 tons for most Strawberry Plains residences) and furnace BTU rating. Never base sizing solely on the nameplate of your old equipment.
How long does a dual-fuel replacement take and what disruptions should I expect?
Most residential replacements are completed in a single day, though complex duct modifications or electrical upgrades can extend the project to two days. Contractors will remove your old air handler, outdoor unit, and furnace (if present), set the new dual-fuel components, connect refrigerant and gas lines, integrate the smart thermostat, and test airflow and refrigerant charge. You should anticipate brief periods without heating or cooling, and technicians will need access to indoor utility areas and outdoor condensing pad. Reputable installers leave the workspace clean and dispose of old equipment responsibly.
Are rebates or incentives available in Strawberry Plains or Tennessee for upgrading to a dual-fuel HVAC system?
Yes. Tennessee Valley Authority (TVA) and local power companies periodically offer rebates—often $150–$300 for qualifying high-efficiency heat pumps. Federal tax credits under the Inflation Reduction Act (Section 25C) provide up to 30 % of the project cost (maximum $2,000) for heat pumps that meet Tier III CEE efficiency levels when combined with a gas furnace. Some natural gas utilities offer additional incentives for high-efficiency furnaces. Your HVAC contractor can help you gather model and efficiency documentation, submit rebate forms, and ensure that your new system meets all eligibility criteria.