Same-Day Service
Most service calls handled same-day across Spokane and Coeur d'Alene.
AC Replacement
A new AC, installed the right way.
The single biggest factor in AC efficiency, comfort, and lifespan isn’t the equipment — it’s the install. We Manual J load-calculate every home, size the system to match, and certify the install against national HVAC standards (ACCA Manual D ductwork, Manual S equipment selection).
You get a fixed-price quote up front. We handle every available manufacturer and utility rebate, set up financing if you want it, and back the work with a 10-year parts and 2-year labor warranty.
- Manual J load calc Right-sized for your home — never the cookie-cutter "bigger is better" install.
- Rebates handled Avista, manufacturer, and federal tax credits — we file the paperwork.
- 10-year parts warranty Manufacturer parts coverage plus our 2-year Mainstream labor warranty.
- No-pressure quote Free in-home estimate. We'll never push a system you don't need.
Limited Time Offer
Efficient HVAC Repairs, Installation, & Maintenance
Upgrade Your Home Cooling
- Certified Technicians
- Quick Repairs
- Emergency Service
- Quality Service
When to Replace
Signs your AC is ready for replacement
A new AC is a 12–15 year decision. Replacing at the right moment saves money — and prevents a no-cooling emergency in July.
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Over 10–12 years old
Most AC systems last 12–15 years. Past 10, efficiency and reliability fall off fast.
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Climbing energy bills
A 16+ SEER2 system can cut a 13 SEER unit's power bill 20%+ on hot summer days.
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Frequent repairs
Once you're calling for service every year, the cumulative repair cost passes a new install.
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R-22 (Freon) system
R-22 was banned in 2020. Recharge cost is now prohibitive — replacement is the right call.
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Uneven cooling
Hot upstairs, cold downstairs usually means an oversized or under-zoned system.
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Major remodel or addition
Adding square footage often pushes an existing AC past its design capacity.
What We Install
High-efficiency cooling from the brands we trust
Single-stage, two-stage, variable-speed, and heat pump systems — matched to your home, your fuel, and your budget.
- Central AC systems Up to 22 SEER2 high-efficiency split systems from Carrier, Trane & Lennox.
- Heat pump replacement Cold-climate models that handle Inland Northwest winters and summers in one system.
- Two-stage & variable Inverter-driven systems for quieter, more even comfort and lower bills.
- Variable-speed blowers ECM motors that move the right amount of air — not all-on or all-off.
- Smart thermostats Ecobee, Nest, and Honeywell — installed and configured to your system.
- Ductwork modifications Sealing, sizing, and rerouting ductwork when the existing system is undersized.
- Electrical & disconnects Breaker upgrades, new disconnects, and code-compliant rough-in.
- Rebates + financing Avista, manufacturer rebates, and 0% financing options handled in-house.
How It Works
A new AC install, start to finish
From first phone call to final walk-through — usually one day on-site.
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Free home assessment
A comfort advisor measures, load-calculates, and walks you through the right-size options.
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Fixed-price quote
Multiple system options, financing scenarios, and rebates — all in writing, no pressure.
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Install day
Most installs done same-day. Old system removed and disposed, new one commissioned.
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Walk-through
Tech walks you through thermostat, filter changes, warranty, and registers everything.
Current Specials
Save on the work your home needs most.
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 a quieter, more efficient home?
Same-day service 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
★★★★★
Check air conditioner and gas furnace take sure all was working as it should...on time, very courteous, went right to work, and explained everything in layman's terms
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
AC Replacement — Frequently Asked Questions
How long does an AC replacement take?
Most straightforward replacements take 6–8 hours and are completed in a single day. Larger projects involving ductwork or electrical changes can take a second day. We schedule the install at your convenience and confirm a firm time window the day before.
What size AC do I need?
Size is determined by a Manual J load calculation that factors in square footage, insulation, windows, climate, and zoning — not by square footage alone. Oversized AC systems short-cycle, run inefficiently, and create comfort and humidity problems. We never quote by rule of thumb.
What rebates are available?
Avista offers heat-pump and high-efficiency AC rebates of up to $1,200 for qualifying models. Federal tax credits cover up to 30% of qualified equipment cost (subject to annual limits). Manufacturer-specific rebates run seasonally. We handle all the paperwork.
Do you offer financing?
Yes — including 0% APR for qualified buyers, low fixed-rate plans, and longer terms when needed. We’ll pre-qualify you in minutes and walk through the options during the in-home estimate.
What's warrantied?
New AC systems come with the manufacturer’s 10-year parts warranty (registration required, which we handle for you) plus a 2-year Mainstream labor warranty. Care Club members get extended labor coverage and priority service.
Should I get a heat pump instead?
For many Inland Northwest homes, a cold-climate heat pump is now more efficient than a gas furnace + AC combo — and qualifies for the largest rebates. We’ll show you side-by-side numbers — equipment cost, lifetime energy cost, rebates — and let you decide.
*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.
