Heat Pumps

Heat Pump vs. Gas Furnace in Seattle: Which Is Better for Your Home?

Published October 6, 2026

How each system heats your home

A gas furnace burns natural gas to make heat, then a blower pushes that hot air through your ducts. It delivers very warm air in shorter bursts and works the same whether it's 45°F or 15°F outside.

A heat pump doesn't burn anything. It uses refrigerant to pull heat from the outdoor air and move it inside — even when it feels cold out. In summer the same equipment runs in reverse and works as an air conditioner. Because it moves heat rather than creating it, a heat pump can deliver more heat energy than the electricity it uses.

Heat pump vs. gas furnace at a glance

Why heat pumps fit the Seattle climate so well

Heat pumps are most efficient in moderate cold — and that describes most of a Puget Sound winter. We get months of 35–50°F days and only short stretches of hard freezes. That's very different from places like Minnesota, where heat pumps have to work in subzero weather for weeks.

A few other things work in a heat pump's favor here:

• Summer heat is real now. Many older Seattle, Shoreline and Edmonds homes were built without air conditioning. Heat waves have made cooling feel less like a luxury, and a heat pump adds it without a second system.
• Cleaner indoor air. With no combustion, there's no chance of carbon monoxide coming from your heating system. You'll still want CO detectors if you have other gas appliances or an attached garage.
• Steady comfort. Heat pumps run longer, gentler cycles. Many people notice fewer cold spots and less temperature swing. (The air at the vent feels warm rather than hot — our guide on why a heat pump can feel like it's blowing cold air explains what's normal.)

One thing to plan for: in damp, near-freezing weather, a heat pump will periodically run a short defrost cycle to clear frost off the outdoor coil. That's normal, but it's another reason proper sizing and a good installation matter.

When a gas furnace still makes sense

We give honest advice, and sometimes that means keeping gas — at least for now:

• Your furnace is newer and healthy. Replacing a well-running furnace just to switch rarely pays off. Many homeowners wait until the furnace needs a major repair or reaches the end of its life.
• Your home loses heat fast. A drafty, poorly insulated house needs a larger heat pump. Sealing air leaks and adding insulation first can make a heat pump smaller and more affordable.
• Electrical limits. Some older homes need a panel upgrade or a new circuit before a heat pump can be added. That's often solvable, but it affects cost and timing.
• You want the hottest possible air from the vents. Some people simply prefer the feel of furnace heat.

The middle option: a dual-fuel (hybrid) system

A dual-fuel system adds a heat pump to your existing or new gas furnace. The heat pump handles heating most of the year and all of your cooling. On the coldest days, the system switches to the furnace automatically.

This can be a good fit if:

• Your furnace has plenty of life left and you want to add AC
• You want to cut gas use without going fully electric yet
• You'd like a backup heat source you already trust

What affects the cost

Every home is different, so we don't quote prices without seeing the house. These are the factors that matter most:

• Your ductwork. Good ducts can usually be reused. Leaky or undersized ducts may need sealing or changes, since heat pumps move more air at lower temperatures.
• Home size, insulation and layout. A proper load calculation — not a rule of thumb based on square footage — decides the right equipment size.
• Equipment type. Cold-climate and variable-speed heat pumps cost more up front but perform better in winter and run more quietly.
• Electrical work. Panel capacity, a new circuit, or a disconnect can add to the job.
• What you're replacing. Removing an old furnace, adding a new air handler, or keeping the furnace for a dual-fuel setup each changes the scope.
• Your utility rates. Running costs depend on your electric and gas rates and how efficient your current furnace is. Your electric provider (Seattle City Light, PSE or Snohomish County PUD, for example) makes a real difference.

Rebates and incentives right now

Incentives change often, so here's the current picture to check before you decide:

• Federal tax credit: The federal 25C credit for heat pumps ended for equipment installed after December 31, 2025, so don't count on it for a project this year.
• Seattle City Light customers: City Light has offered instant discounts through participating contractors on qualifying high-efficiency heat pumps. Gas customers in Seattle are pointed to PSE for gas-related programs.
• PSE customers: PSE's earlier pilot rebate for switching from gas to a heat pump was retired in 2024. PSE programs change, so it's worth checking what's available when you're ready.
• Income-qualified programs: Washington and some utilities have offered extra help for income-qualified households.

Rather than guessing, ask us. We help every customer find which utility rebates and programs they actually qualify for before they sign anything.

Quick checklist to help you decide

1. Find your furnace's age. It's usually on the label inside the furnace door. 15+ years old? Start planning now, before it fails in January.
2. Note how your home feels. Cold rooms, hot upstairs in summer, or no AC at all all point toward a heat pump.
3. Look at your electrical panel. Note the amperage and whether there are open breaker spaces.
4. Gather a year of utility bills for gas and electricity.
5. Check your ducts where you can see them — crushed, disconnected or unsealed sections are worth noting.
6. Get an in-home assessment with a load calculation and side-by-side options.

When to call a pro

Choosing and installing either system isn't a DIY job — heat pumps involve refrigerant and high-voltage wiring, and furnaces involve gas lines and venting. Call a licensed HVAC contractor when:

• Your furnace is aging, needs an expensive repair, or keeps breaking down
• You want to add air conditioning before next summer
• You're weighing a full heat pump vs. a dual-fuel setup
• You want to know which rebates apply to your home

Yeti Heating & Air installs and services heat pumps and furnaces across Seattle, Bellevue, Kirkland, Redmond, Renton, Shoreline, Lynnwood, Bothell, Edmonds and Everett. Our licensed, insured technicians size the system to your home, give honest repair-vs-replace advice, and provide upfront pricing you approve before any work starts.

Not sure which is right for your home? Call (206) 823-0670 or request a callback. We're available Mon–Sat 7am–7pm, with 24/7 emergency service if your heat goes out in the meantime.