Picture a January morning in South Jordan: it’s 18 degrees outside, the sun won’t clear the Oquirrhs for another hour, and you’re staring at a thermostat that isn’t keeping up. If you’ve been researching heat pumps, you’ve probably run into two completely opposite answers online. One says modern heat pumps handle any winter; another warns they’ll ice over and leave you cold. Both answers are technically true in different circumstances, which is exactly why the conflicting information is so frustrating. What follows is a straight explanation of what the technology can do, where it runs into limits in a climate like ours, and what incentives are actually available right now.
Our team at Brozwood has over 30 years of collective HVAC experience, including winters across the Wasatch Front. This isn’t a sales pitch for heat pumps or against them.
How a Heat Pump Pulls Heat out of Winter Air
The confusion about cold-weather performance usually starts here: people assume a heat pump generates heat the way a furnace does, by burning something. It doesn’t. A heat pump moves thermal energy that already exists in outdoor air, compressing refrigerant to concentrate that energy and release it inside your home. The key insight is that even frigid outdoor air contains usable heat. At 20 degrees Fahrenheit, air still holds roughly 85% of the thermal energy it holds at 70 degrees.
Below freezing, moisture deposits as frost on the outdoor coil. A defrost cycle, which runs automatically, reverses refrigerant flow briefly to clear that frost before resuming normal heating. During defrost, output drops for a few minutes. On a cold day you’ll hear the system cycle through this process every hour or two. That’s normal operation, not a failure.
What South Jordan Winters Actually Ask of a Heat Pump
South Jordan’s average January high sits around 33 degrees Fahrenheit, with average lows near 18 degrees. That range matters more than the single worst night of the year, because a heat pump has to perform reliably across the full distribution of winter temperatures, not just survive an extreme low.
This is where equipment selection becomes critical. Standard heat pumps rated for moderate climates begin losing meaningful heating capacity around 32 degrees. Units carrying ENERGY STAR Cold Climate certification must demonstrate efficient operation at 5 degrees Fahrenheit. The technology behind that threshold is the variable-speed inverter compressor, which modulates output rather than cycling on and off at full power, and in some models vapor injection, which boosts refrigerant pressure at low outdoor temperatures. Cold-climate heat pumps today look nothing like the single-speed units that gave the technology its bad reputation in cold places a decade ago.
The Salt Lake Valley’s temperature inversion patterns (where cold air pools on the valley floor and holds temperatures well below surrounding bench areas) can increase how often your outdoor coil cycles through defrost during sustained cold snaps. It doesn’t stop a properly sized cold-climate unit from heating your home, but it does mean the system works harder during those stretches than a national average would predict.
Capability vs. Cost: Why Dual-Fuel Setups Are Common Here
The question “do heat pumps work in Utah winters” actually contains two separate questions: can a heat pump physically produce heat when it’s 18 degrees outside, and is it the most cost-effective way to produce that heat at 18 degrees? The answer to the first question is yes, with the right equipment. The answer to the second depends on your electricity and gas rates.
How COP Changes with Temperature
A heat pump’s coefficient of performance, or COP, describes how many units of heat it delivers per unit of electricity consumed. At 40 degrees, a good cold-climate unit might deliver a COP of 3.0 or higher. That means three dollars of heat for every dollar of electricity. As outdoor temperature drops, COP drops too. At 5 degrees, that same unit might deliver a COP closer to 1.5. A gas furnace, by contrast, burns at roughly the same cost per unit of heat regardless of outdoor temperature.
Finding the Balance Point
The balance point is the outdoor temperature at which a dual-fuel system (pairing a heat pump with a gas furnace) should switch to the furnace because it’s become the more economical choice. For a typical South Jordan installation, where Rocky Mountain Power supplies electricity and Enbridge supplies natural gas, that crossover usually falls somewhere between 15 and 30 degrees. The exact number depends on current utility rates and the specific equipment installed.
A dual-fuel setup uses the heat pump for the majority of winter hours when temperatures are in the 20s and 30s, captures the efficiency advantage during milder stretches, and hands off to the furnace for the coldest nights without any interruption to comfort. Homeowners who already have a functional gas furnace often find dual-fuel to be the most practical path. Adding a heat pump as the primary heating stage and keeping the existing furnace as backup makes the transition straightforward.
What Heat Pump Incentives Actually Look Like Right Now
Several articles still advertise a federal Section 25C tax credit of up to $2,000 for qualifying heat pump installations. That credit expired for equipment placed in service after December 31, 2025, eliminated by the One Big Beautiful Bill Act. If you’re planning an installation in 2026 or later, don’t budget for it based on what you’ve read on those sites.
What is still available locally is worth knowing about:
- Rocky Mountain Power Wattsmart Homes: South Jordan’s electric utility offers cash rebates for qualifying residential heat pump installations. The program updated its incentive structure effective February 27, 2026, so current rebate amounts and qualifying equipment lists are available directly through Rocky Mountain Power.
- Enbridge ThermWise: South Jordan’s natural gas provider runs a separate rebate program for qualifying weatherization improvements and high-efficiency gas heating equipment. For homeowners installing a dual-fuel system, ThermWise rebates can potentially be stacked with the Rocky Mountain Power program, meaning a single project may qualify for incentives from both utilities.
Matching the System to Your Home
HSPF2 is the current standard for comparing seasonal heating efficiency between heat pump models. It replaced the older HSPF rating, so older marketing materials and some competitor comparisons use numbers that aren’t directly comparable. When you’re evaluating equipment, make sure you’re looking at HSPF2 figures.
Beyond ratings, the right system depends on what’s already in your home. Existing ductwork condition, the age and efficiency of your current furnace, and how well your home retains heat all affect whether a ducted dual-fuel setup, a standalone cold-climate heat pump, or a ductless system makes the most sense. A home with poor envelope insulation will struggle regardless of which heating system you install, so any honest evaluation starts with the building, not just the equipment.
The one number that actually answers the question for your specific house isn’t a national average or a general guideline. It’s a load calculation and balance point recommendation based on your home’s actual square footage, construction, and insulation level. That calculation tells you which system can keep you warm through a South Jordan January and what it may cost to run. Reach out to Brozwood at (385) 396-7105 to get that evaluation done properly.