Best Heat Pump (2026): How to Choose + ENERGY STAR Data

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The best heat pump for a Front Range home is a correctly sized, ENERGY STAR certified cold-climate model, installed by a contractor who runs a real load calculation and sets up the backup heat properly. The logo on the outdoor unit matters much less than that. Heat pumps have improved quickly: many ducted systems now keep delivering useful heat at 5°F, and roughly half of all ENERGY STAR certified ducted pairings carry the cold-climate designation. This guide explains the ratings that matter (SEER2, HSPF2 and COP at 5°F), how variable-speed compressors change comfort, when a dual-fuel setup makes sense, and what the certified data shows across manufacturer families. On method: we don’t test equipment or rank brands on reliability. This guide explains how to choose and reports what ENERGY STAR’s certified product data shows, nothing more.

Part of our Heating, Cooling & Ventilation guide — start there for the full picture →

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Quick Decision Table: Which Heat Pump Setup Fits Your Home?

Most buyers are really choosing a system type first and a brand second. The price bands below are typical installed costs for a single-family home in 2026. They move with capacity, ductwork condition, electrical upgrades, the backup heat you choose, and how much of the old system is reused.

If you are still deciding between a heat pump and a new furnace, our comparison of a heat pump vs furnace covers operating cost and comfort trade-offs, and the heat pump installation cost guide breaks a quote into equipment, labor, electrical and ductwork. Homes without ducts should start with our guide to the best mini split instead.

What Actually Matters When Choosing a Heat Pump

The efficiency ratings: SEER2, EER2 and HSPF2

A heat pump is a central air conditioner that can also run in reverse, so it carries both cooling and heating ratings. SEER2 is seasonal cooling efficiency, EER2 is cooling efficiency at a single hot test condition, and HSPF2 is seasonal heating efficiency. Higher is better for all three. The “2” means the numbers come from the newer federal test procedure, which uses more realistic duct pressure than the old SEER and HSPF tests, so the 2-numbers look lower than older ratings for similar equipment. Don’t compare a SEER from a 2018 brochure with a SEER2 on a 2026 quote.

ENERGY STAR’s current criteria for ducted split-system heat pumps are at least 7.8 HSPF2, 15.2 SEER2 and 11.0 EER2. Packaged single-cabinet units have slightly lower thresholds. Higher-rated equipment usually costs more up front, so weigh the rating against your local electricity rate and how many hours the system will run.

Cold-climate performance: COP at 5°F

HSPF2 averages a whole heating season in a moderate reference climate. For the Front Range, the more telling numbers are what the system does on a January cold snap. That is what ENERGY STAR’s cold-climate designation tests. To earn it, a heat pump must show:

• A coefficient of performance (COP) of at least 1.75 at 5°F, meaning it delivers at least 1.75 units of heat for each unit of electricity at that temperature.
• Heating capacity at 5°F of at least 70% of its capacity at 47°F, so it does not lose most of its output as the temperature falls.
• A controls verification procedure confirming the unit’s own controls actually reach that performance as installed in a home, not only in a lab override mode.
• Ducted cold-climate split systems also need at least 8.1 HSPF2; non-ducted systems need 8.5.

Capacity retention is the number many buyers overlook. A system with a high COP but weak capacity at 5°F will lean heavily on backup heat on the coldest nights. Ask the contractor for the manufacturer’s extended performance table and look at the heating capacity in Btu per hour at 5°F and 17°F against your home’s calculated heat loss at the design temperature.

Compressor staging: single, two-stage or variable speed

A single-stage compressor is either on at full output or off. A two-stage unit has a low setting for mild days. A variable-speed (inverter) compressor can ramp across a wide range, running long and slow most of the time. Variable speed usually brings steadier temperatures, better humidity control in summer, quieter operation and, in cold-climate models, the extra speed range that holds capacity as it gets colder. It also costs more and uses more complex electronics. In the ENERGY STAR data, continuously variable systems make up the majority of certified ducted pairings, a sign of where the market has moved.

Refrigerant: R-454B, R-32 and older R-410A

EPA’s technology-transition rules under the AIM Act moved new residential air conditioning and heat pump systems away from R-410A toward lower global-warming-potential refrigerants, with a January 1, 2025 compliance date for new installs and a later window for already-built equipment. EPA finalized a reconsideration of parts of those rules in May 2026, so check the current status if you are offered older stock. In practice, most new ducted heat pumps use R-454B, and a smaller share use R-32. Indoor and outdoor units must be matched for the same refrigerant, which often means replacing the indoor coil even if the furnace or air handler stays. Ask the installer which refrigerant the system uses and confirm it is a matched, certified pairing.

Backup heat on the Front Range

Denver-area winters are mostly mild and sunny, with short, sharp cold snaps and big day-to-night swings. That pattern suits heat pumps well, but you still need a plan for the coldest hours. There are two common answers. Electric resistance strip heat in the air handler is simple and cheap to install but expensive to run, and large strip kits can require a panel upgrade. Dual fuel pairs the heat pump with a gas furnace and switches to gas below a set outdoor temperature, called the balance point or changeover temperature. ENERGY STAR notes that adding a certified heat pump to a relatively new furnace creates a dual-fuel system for a modest extra cost over an air conditioner. If your furnace is near the end of its life, our guide to the best furnace covers what to look for in the gas side of a dual-fuel pair.

Altitude matters too. Outdoor coils and fans move thinner air above 5,000 feet, and some manufacturers publish altitude corrections. A good contractor accounts for that in equipment selection.

Defrost and outdoor placement

In cold, damp weather the outdoor coil frosts over, and the unit periodically runs a defrost cycle. Brief steam and a pause in heat are normal. A coil that stays iced or a unit buried in drifted snow is not. The outdoor unit should sit on a pad or stand raised above typical snow depth, clear of roof drip lines, with room for melt water to drain away. Our guide to why a heat pump freezes up explains which icing is normal and which signals a problem.

What the ENERGY STAR Data Shows

We pulled ENERGY STAR’s certified ducted heat pump list, which records each certified combination of indoor and outdoor unit. Across the U.S. market, the list holds 266,454 certified pairings. Of those, 132,409 (about 50%) carry the cold-climate designation and 116,862 (about 44%) are recognized as ENERGY STAR Most Efficient.

Manufacturer families: one factory, many badges

The single most useful thing the data shows a shopper is how few companies stand behind the names on the trucks. ENERGY STAR lists the partner company that certifies each system, and many brands share one partner. Carrier Corporation’s certifications, for example, span Carrier, Bryant, Heil, Tempstar, Day & Night, Comfortmaker, Arcoaire and KeepRite. Daikin Comfort Technologies covers Daikin, Goodman and Amana. Trane and American Standard share one partner, as do York, Coleman and Luxaire under Johnson Controls, and Rheem and Ruud under Rheem.

Selected brands: cold-climate and variable-speed share

For shoppers searching for the best heat pump brand, here is how familiar badges look in the same list. Sister brands track each other closely because they certify largely the same hardware.

How to read these tables honestly:

• Counts are pairings, not products. One outdoor unit can appear in hundreds of pairings with different coils and air handlers. A big number means a broad catalog of approved combinations, not a better heat pump.
• The COP spread is narrow. Median cold-climate COP at 5°F runs from about 1.85 to 2.10 across the families, all comfortably above the 1.75 minimum. The specific model you are quoted matters more than the family median.
• A low cold-climate share is not a verdict. It can reflect a large catalog of cooling-focused or single-stage pairings for warmer markets. Every family above certifies cold-climate systems.
• None of this measures reliability, noise or service. ENERGY STAR rates efficiency. The quality of the install and the dealer behind it decide how the system performs over its life.

To check a specific quote, enter the outdoor and indoor model numbers into the ENERGY STAR heat pump product finder or the AHRI directory and confirm the exact pairing, its HSPF2 and whether it carries the cold-climate designation.

Installation and the Home-Inspection Angle

A premium heat pump installed badly will underperform a mid-range one installed well. These are the points inspectors and energy auditors commonly flag.

Sizing with a Manual J

ENERGY STAR’s own buying guidance says contractors should size the system with a Manual J load calculation. Rules of thumb such as “one ton per 500 square feet” or “same size as the old unit” ignore insulation, windows, air leakage and orientation. An oversized heat pump short-cycles, controls humidity poorly and can wear faster. An undersized one leans on backup heat. Ask for the written load calculation and the design temperatures used. Cold-climate sizing often balances heating load against cooling load, and variable-speed units make that balance easier.

Ducts, airflow and the indoor side

Heat pumps deliver air that feels cooler than furnace air, so leaky or undersized ducts show up as cold rooms and drafts. Expect the contractor to check static pressure and airflow, seal accessible ducts, and confirm the return path is adequate. Ducts running through an unconditioned attic or crawlspace should be sealed and insulated. If the old system used a separate coil on a furnace, the new refrigerant usually requires a matched coil.

What an inspector checks at the outdoor unit

• A level pad or stand raised above snow, with clearance from walls, shrubs and dryer vents.
• Refrigerant line insulation that is intact and UV protected along its full run; bare suction lines lose capacity and sweat.
• A service disconnect within sight of the unit and wiring in proper conduit.
• Defrost melt water that drains away from the foundation and walkways instead of freezing on steps.

What an inspector checks at the indoor unit

• A condensate drain that slopes properly, with a trap where required and a secondary pan or float switch over finished space.
• Filter access that is easy enough for the owner to change filters on schedule.
• Strip-heat breakers sized to the kit, and a panel with capacity for the full load.
• A thermostat set up for heat pump control, including auxiliary and emergency heat settings and, on dual-fuel systems, the changeover temperature.

Permits and paperwork

Front Range cities and counties generally require a mechanical permit, and often an electrical permit, for a heat pump replacement. A permitted job gets an inspection and leaves a record that helps at resale. Ask the installer to register the equipment warranty with the manufacturer, since many extended parts warranties depend on registration within a short window after installation. Keep the model and serial numbers, the AHRI certificate and the load calculation together. Our guide to how long a heat pump lasts covers the maintenance that protects that investment.

How to vet a heat pump installer

Ask every bidder the same questions so the quotes are comparable. Will they perform a Manual J and share it? Which exact outdoor and indoor model numbers, and what is the AHRI or ENERGY STAR reference for that pairing? Is it a certified cold-climate system? What backup heat is included, and at what outdoor temperature does it engage? Who pulls the permit? What labor warranty do they offer on their own work? Contractors who answer clearly and in writing are usually the ones who install carefully. Our heating and cooling hiring guide walks through vetting HVAC professionals step by step. If you are weighing a heat pump against other whole-house options, the best HVAC system guide compares the main setups side by side.

Where to Buy a Heat Pump

Ducted heat pumps are sold almost entirely through installers. Big-box stores offer installed-sales programs that subcontract to local HVAC companies, while independent dealers quote and install directly. Get at least three written quotes, compare the exact model pairings rather than brand names, confirm who pulls the permit, and check your utility for current heat pump rebates (in the Denver area, start with Xcel Energy Colorado) and the ENERGY STAR rebate finder before you sign.

References

• Heat Pump Equipment Key Product Criteria (including Cold Climate Requirements) — ENERGY STAR (U.S. EPA)
• Air-Source Heat Pumps: Buying Guidance, Sizing, Dual Fuel and Cold Climate — ENERGY STAR (U.S. EPA)
• ENERGY STAR Certified Heat Pumps Product Finder — ENERGY STAR (U.S. EPA)
• Regulatory Actions: Technology Transitions (HFC Refrigerants) — U.S. EPA
• ENERGY STAR Rebate Finder — ENERGY STAR (U.S. EPA)