- HEP Heat and Air
- High-efficiency Technology

High-efficiency Technology
High-efficiency Technology | HVAC Unit Replacement | Heating and Air Conditioning | Elizabethton
Nestled between the Watauga River and the Appalachian peaks, Elizabethton deals out scorching summers, brisk mountain evenings, and everything in between. HEP’s high-efficiency technology keeps pace with every swing, replacing outdated systems with whisper-quiet units that slash energy bills and boost indoor comfort. Our NATE-certified technicians size your equipment precisely, install smart thermostats, and haul away the old hardware—often in a single day—so you’re left with nothing but steady, even temperatures and lower utility statements.
When you trust HEP for HVAC unit replacement, you get more than a swap-out; you get a performance upgrade engineered for Northeast Tennessee’s unique climate. We back each installation with transparent pricing, robust warranties, and 24/7 emergency support, ensuring peace of mind long after the job is done. Ready to breathe easier and pay less? Give our local team a call, and feel for yourself why neighbors from Lynn Valley to Siam recommend HEP for comfort that goes the distance.
FAQs
Why should I replace my current HVAC system with a high-efficiency unit?
New high-efficiency heat pumps and air conditioners can cut your annual heating and cooling costs by 25–40 %, thanks to variable-speed compressors, electronically commutated motors (ECMs), and smart thermostats. In Elizabethton’s humid, four-season climate, that translates into lower utility bills year-round, quieter operation, better humidity control, and a smaller carbon footprint.
How do I know it’s time to replace instead of repair my old HVAC system?
Most systems in our area last 12–15 years. If your unit is approaching this age, requires major repairs (compressor, heat exchanger, or multiple refrigerant leaks), or your energy bills keep climbing, replacement is usually more economical. A rule of thumb: if repair cost × system age in years exceeds $5,000, a new high-efficiency system is the better investment.
What incentives or rebates are available in Elizabethton for high-efficiency HVAC replacements?
Customers served by the Elizabethton Electric Department can access TVA EnergyRight® rebates of up to $600 for qualifying heat pumps rated 16 SEER2 or higher. Federal tax credits (Section 25C) provide up to 30 % of project cost—capped at $2,000—for ENERGY STAR® certified heat pumps and furnaces. Many manufacturers also run seasonal rebates worth $300–$1,000 on top of utility and federal incentives.
How long does a typical HVAC replacement take?
Most residential change-outs can be completed in a single day: 2–3 hours to remove the old equipment, 3–5 hours to set the new condenser/air handler or furnace, and another hour for refrigerant charging, testing, and thermostat setup. Duct modifications, electrical upgrades, or indoor air-quality add-ons (like air purifiers) can extend the job to two days.
Will a high-efficiency system require new ductwork?
Not always. We perform a duct inspection and static-pressure test during our estimate. If your ducts are properly sized, sealed, and insulated, they can be reused. However, variable-speed systems are sensitive to airflow; undersized or leaky ducts can reduce efficiency by 20 % or more, so minor adjustments—or occasionally full replacement—may be recommended.
How do I choose the right size unit for my home?
Our comfort advisers run a Manual J heat-load calculation that factors in Elizabethton’s design temperatures (15 °F winter, 88 °F summer), square footage, insulation levels, window orientation, and air-infiltration rates. Sizing by rule of thumb (e.g., tons per square foot) risks short-cycling or inadequate comfort. A properly sized high-efficiency system will maintain setpoints while operating longer, quieter cycles at lower capacity for maximum savings.