Do Heat Pumps Actually Work in Western Washington?

Short answer: yes — and they're probably the best option for most homes in our area.

If you've been doing any research on heating and cooling, you've heard the buzz about heat pumps. You've also probably heard someone at a barbecue in Buckley say, "Yeah, but they don't work when it gets really cold." Let's talk about that — because the reality has changed dramatically in the last few years, and what was true in 2010 isn't true anymore.

What a heat pump actually does

A heat pump doesn't generate heat. It moves it. Even when it's 35°F and raining sideways in Enumclaw (so, October through June), there's thermal energy in the outdoor air. A heat pump extracts that energy and moves it inside your home. In summer, it reverses — pulling heat out of your home and pushing it outside. One system, both directions.

Think of it like a refrigerator. Your fridge doesn't "create" cold. It pulls heat out of the box and dumps it into your kitchen. A heat pump does the same thing, just at house scale.

"But what about when it gets really cold?"

This is the question we hear most — and it's a fair one. Here's the thing: Western Washington's climate is almost perfectly designed for heat pumps. Our winters are mild compared to the Midwest or Northeast. Enumclaw's average January low is around 33°F. Puyallup's is 35°F. Bonney Lake sits around 34°F.

Modern cold-climate heat pumps (like the Carrier Infinity series we install) are rated to operate efficiently down to 5°F — and can still produce heat well below that. We're not Fairbanks. We're not even Spokane. Our climate sits right in the sweet spot where heat pumps perform at their best.

Those handful of days per year when it drops below freezing? The system handles it. And if you have a dual fuel setup (heat pump paired with a gas furnace), the gas kicks in as backup during those rare cold snaps. Best of both worlds.

Why heat pumps make particular sense here

A few things about our area that make heat pumps especially smart:

PSE rebates are generous right now. Puget Sound Energy offers midstream rebates of $300–$600 depending on the system efficiency, plus up to $1,500 for qualifying conversions from electric resistance heat. Income-qualified households can receive up to $2,400 through the Energy Boost program. These rebates are instant — applied at the time of purchase. No waiting, no paperwork headaches.

Our electricity rates are relatively low. Washington State has some of the lowest electricity costs in the country, thanks to hydroelectric power. Running a heat pump here costs significantly less than running one in, say, Connecticut.

Our temperature swings are moderate. Heat pumps are most efficient when the temperature difference between inside and outside is small. In Western Washington, that difference is rarely extreme — which means the system runs in its most efficient range for most of the year.

Cooling is becoming a necessity, not a luxury. Ten years ago, most homes in Enumclaw didn't have air conditioning. After the heat dome events and increasingly warm summers, that's changed. A heat pump gives you AC as part of the package — no separate system needed.

What about my existing furnace?

If your gas furnace is working fine and relatively new, you don't necessarily need to replace it. But if it's aging (15+ years), needs frequent repairs, or you're looking at a major repair bill, this is the moment to consider whether your next system should be a heat pump instead of another furnace.

We also install dual fuel systems that pair a heat pump with your existing gas furnace. The heat pump handles the vast majority of heating (and all of your cooling), and the furnace kicks in only during the coldest days. This gives you the efficiency of a heat pump with the peace of mind of gas backup.

The honest take

We install heat pumps, furnaces, and dual fuel systems. We don't push one over the other — what makes sense depends on your home, your existing setup, your utility situation, and your budget. But we'd be lying if we said we weren't installing more heat pumps every year. The technology has caught up, the rebates are strong, and the math works for most homes in our service area.

If you're curious whether a heat pump makes sense for your home, we're happy to walk through the specifics. No pressure, no sales pitch — just an honest conversation about what would actually serve you best.