One of the most common questions we get from homeowners across Snohomish County is: "Should I replace my old furnace with a heat pump, or stick with gas?"

It's a great question — and the honest answer is: it depends. Both systems have real advantages, and the right choice comes down to your home, your utility costs, and your priorities. Let's break it down.

How Each System Works

Gas furnace: Burns natural gas to generate heat, which is distributed through your ductwork. Very effective at producing high-temperature heat quickly, even on the coldest days.

Heat pump: Moves heat rather than generating it. In heating mode, it extracts heat energy from the outdoor air (even cold air contains heat energy) and transfers it inside. In cooling mode, it reverses the process. One system handles both heating and air conditioning.

The Case for a Heat Pump

Energy Efficiency

Heat pumps are significantly more efficient than gas furnaces. A modern heat pump can deliver 2–4 units of heat energy for every unit of electricity it consumes — that's 200–400% efficiency, compared to even the best gas furnaces which top out around 98%.

In Snohomish County, where winters are cold but rarely extreme, heat pumps perform well for most of the heating season. Washington State's electricity grid is also increasingly clean (thanks to hydropower), which makes electric heating a lower-carbon choice.

One System, Two Functions

A heat pump replaces both your furnace and your air conditioner. If your AC is aging alongside your furnace, replacing both with a single heat pump system can make a lot of financial sense.

Utility Incentives

Washington State and Puget Sound Energy both offer rebates for heat pump installations. Depending on your utility and the equipment you choose, you may qualify for significant upfront savings. We can walk you through what's available when you get a quote.

The Case for a Gas Furnace

Performance in Extreme Cold

Heat pumps lose efficiency as outdoor temperatures drop. Most modern cold-climate heat pumps perform well down to 0°F or below, but if you want maximum heating capacity on the coldest nights, a gas furnace still has an edge.

For this reason, many homeowners in our area choose a dual-fuel system — a heat pump that handles most of the heating load efficiently, with a gas furnace as a backup for the coldest days.

Lower Upfront Cost

Gas furnaces are generally less expensive to purchase and install than heat pumps, especially if you're replacing a furnace-only system and don't need cooling.

Familiar Technology

If you already have a gas line and ductwork sized for a furnace, staying with gas is straightforward. Heat pump installations sometimes require electrical panel upgrades, which adds to the project cost.

What About Ductless Mini-Splits?

If your home doesn't have ductwork — or if you want to add heating and cooling to a specific area — a ductless mini-split heat pump is worth considering. These systems are highly efficient, easy to install, and give you room-by-room temperature control.

Our Honest Recommendation

For most Snohomish County homes with existing ductwork, a cold-climate heat pump is an excellent choice — especially if your current air conditioner also needs replacement. The efficiency gains are real, the utility rebates help offset the cost, and you end up with a single modern system for both heating and cooling.

If you heat primarily with gas and your home gets very cold, or if budget is the top priority, a high-efficiency gas furnace is still a solid, reliable option.

The best way to know for sure? Let us take a look at your home, your current system, and your utility bills. We'll give you an honest assessment and a written quote for both options — no pressure, no upsell.

Call us at 425-610-6635 or fill out our contact form to schedule a free estimate.