Same-Day Service
Most service calls handled same-day across Spokane and Coeur d'Alene.
Heat Pumps
Two systems' worth of comfort. One efficient machine.
A heat pump replaces both your air conditioner and your furnace with a single outdoor unit. In summer it works exactly like a high-efficiency AC, moving heat out of your home. In winter it runs in reverse — pulling heat from the outside air and delivering it indoors at two to three times the efficiency of electric resistance heat.
Modern cold-climate models hold their full heating capacity at 5°F and keep working down to -15°F, so they handle Inland Northwest winters on their own — or pair with your existing gas furnace as a dual-fuel system that automatically picks the cheapest heat source for the day. We size, install, repair, and maintain every major brand.
- Year-round comfort Cooling in July, heating in January — one system, one thermostat.
- 2–3x more efficient Heat pumps move heat instead of making it, cutting costs vs electric furnaces and baseboards.
- Rebates & tax credits Avista rebates plus a 30% federal tax credit (up to $2,000) on qualifying systems.
- Long warranty Up to 12 years parts + 2 years Mainstream labor on every install.
Is a Heat Pump Right for You?
When a heat pump is the smart choice
Heat pumps aren't the answer for every home — but in these situations they almost always win:
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AC and furnace both aging
If both are 12+ years old, one heat pump often costs less than replacing the two separately.
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Heating with electric today
Baseboards or an electric furnace? A heat pump delivers the same warmth for a fraction of the energy.
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Keeping your gas furnace
Dual-fuel setups run the heat pump most days and switch to gas only on the coldest nights.
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No air conditioning yet
Adding cooling anyway? A heat pump adds whole-home AC and upgrades your heating at the same time.
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Want lower energy bills
Inverter-driven heat pumps adjust output to the weather instead of blasting on and off.
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Chasing rebates
Utility rebates and federal tax credits may apply to qualifying heat pumps — we confirm eligibility first.
What We Install & Service
Every heat pump service, under one roof
From a new cold-climate installation to a 15-minute defrost-board fix — handled by factory-trained, background-checked technicians.
- Heat pump installation Full load calculation, right-sized equipment, and a clean, code-compliant install.
- AC-to-heat-pump conversion Swap an aging AC condenser for a heat pump using your existing ductwork.
- Dual-fuel systems Heat pump + gas furnace combos that automatically choose the cheapest heat source.
- Cold-climate models Variable-speed systems rated to keep heating down to -15°F.
- Heat pump repair Compressors, reversing valves, defrost boards, fan motors — every brand.
- Tune-ups & maintenance Twice-a-year service to protect efficiency, capacity, and warranty coverage.
- Air handlers & backup heat Matched air handlers and electric backup heat strips, sized for your home.
- Smart thermostats Heat-pump-aware controls that manage staging, backup heat, and defrost correctly.
How It Works
Your heat pump install, start to finish
Most straight replacements are finished in a single day. Dual-fuel and new-ductwork projects typically take 2–3.
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Free home assessment
A comfort advisor measures your home, checks ductwork and electrical, and runs a proper load calculation.
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Fixed-price quote
Good-better-best options with financing scenarios, rebates, and tax credits — all in writing.
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Install day
Remove the old equipment, set the new system, pressure-test, vacuum, charge, and commission.
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Walk-through
We register your warranty, file rebate paperwork if available, and show you the thermostat before we leave.
Why Choose Mainstream
Upfront Pricing
Flat-rate pricing approved before work begins — no surprises on the invoice.
Licensed & Insured
Fully licensed in Washington and Idaho, bonded, and insured for your protection.
Satisfaction Guaranteed
If it isn't right, we make it right. Period.
Ready for one system that does it all?
Free in-home estimates across Spokane & Coeur d'Alene — flat-rate pricing, no surprises.
What Our Customers Say
Don't just take our word for it — hear from our satisfied customers
★★★★★
Ricky Saldana the technician that came out was fantastic. He was so knowledgeable about my plumbing issues and his recommendations were spot on. He was on time and very pleasant to work with. I would highly recommend him for any plumbing work that needs to be done.
Thanks Ricky for all of your input.
★★★★★
Jake was on time and very good about looking at my furnace. I appreciate all his help. I reccomend him and mainstream electric very highly. thank you Sharon Scott
Maintenance Membership
Join the Care Club
Total home service care, on a schedule.
Members get priority scheduling, seasonal HVAC tune-ups, an annual plumbing & electrical safety inspection, and exclusive discounts — for less than the cost of a single emergency call.
- Priority scheduling
- Seasonal HVAC tune-ups
- Annual safety inspection
- Exclusive member discounts
- Free dispatch on repairs
- No long-term contracts
Heat Pumps — Frequently Asked Questions
Do heat pumps actually work in Spokane winters?
Yes. Modern cold-climate heat pumps deliver 100% of their rated heating capacity at 5°F and keep working down to -15°F — that covers nearly the entire Inland Northwest winter. For homes that want extra insurance, a dual-fuel setup keeps a gas furnace as backup for the handful of extreme nights while the heat pump carries the rest of the season.
How much does a heat pump cost?
Most complete heat pump installations run $9,000–$18,000 depending on size, efficiency tier, and whether a new air handler or electrical work is included. Swapping an aging AC for a heat pump on existing ductwork costs less. We quote a fixed price after the in-home assessment — no surprise add-ons.
What's the difference between a heat pump and an air conditioner?
Mechanically they’re nearly identical — a heat pump simply adds a reversing valve so the refrigerant cycle can run in both directions. That means it cools exactly like a high-efficiency AC in summer and replaces (or assists) your furnace in winter.
What is a dual-fuel system?
A heat pump paired with a gas furnace. The system runs the heat pump whenever it’s the cheaper heat source — most of the season — and automatically switches to gas on the coldest days. It’s a popular setup for homes that already have natural gas.
What rebates and tax credits are available?
Avista offers heat pump rebates of up to $1,200 for qualifying systems, and federal Inflation Reduction Act tax credits provide 30% (up to $2,000) on heat pump installations. We confirm eligibility before you commit and handle the rebate paperwork for you.
How long does a heat pump last?
About 15 years in our climate with regular twice-a-year maintenance. Every system we install includes a 10–12 year manufacturer parts warranty (registration handled by us) plus a 2-year Mainstream labor warranty. Care Club members get extended labor coverage and priority service.
*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
