How to choose an HVAC contractor in Vancouver WA: a homeowner's checklist.

A full AC and furnace replacement runs $12,600 to $26,800 installed on our estimator (Clark County, 2026 prices), and a bad install means repeat repair calls, voided warranties and an early second replacement. Every bid says the contractor is licensed and insured, so the checks below focus on what you can verify before you sign.

Credentials that actually mean something.

An HVAC contractor in Vancouver WA should have an active Washington L&I registration with a bond and insurance, EPA Section 608 certification for every technician who handles refrigerant, and factory certification for the brand being installed.

Washington State contractor license + bonding + insurance.

Every HVAC contractor in Washington must be registered with WA Labor & Industries. The license number should be on their truck, their website, and every quote. You can verify any contractor's license at L&I's verification tool.

Bonding ($30,000 for general contractors and $15,000 for specialty contractors since July 1, 2024) is required by state law and provides a small recourse fund if the contractor abandons a project. Liability insurance ($1M+ recommended) covers damage during work. Workers' comp is required if they have employees.

Red flag: Contractor cannot or will not produce their license number on request. Verify on L&I before any quote conversation.

EPA Section 608 universal certification (every technician).

EPA Section 608 certification is federally required for any technician who services equipment that holds refrigerant. Type II covers high-pressure equipment such as home air conditioners and heat pumps, and Universal covers every type. Apprentices are exempt only while a certified technician closely and continually supervises them. Ask: "Are all your technicians EPA 608 certified, and who supervises your apprentices?"

Manufacturer certifications (Mitsubishi Diamond, AS Authorized Dealer, Carrier Factory Authorized, Trane Comfort Specialist).

Manufacturers run these programs with real training requirements, and the tier can change the warranty you get:

• Mitsubishi Diamond Contractor: Trained directly by Mitsubishi. A Diamond Contractor (or Mitsubishi Ductless Pro) install, registered within 90 days in an owner-occupied home, is required for Mitsubishi's 12-year parts and compressor warranty on qualifying models such as the FX and Smart Multi; WX and HX models top out at 10 years. A registered install by anyone else in an owner-occupied home gets 10 years.
• American Standard Authorized Dealer: The dealer submits warranty claims to American Standard for you, and you or your dealer must register the equipment within 60 days of installation to get the longer Registered Limited Warranty, up to 10 years on parts (labor not included).
• Carrier / Trane / Lennox factory programs: Each major manufacturer runs similar tiered programs. If a contractor installs a brand they are NOT certified on, the warranty may be limited.

NATE certification (technician-level, optional but signal).

NATE (North American Technician Excellence) certifications are earned by exam in installation or service specialties, such as air conditioning, heat pumps and gas heating. NATE is optional: treat it as one signal about an individual technician among several.

Red flags during the quote process.

Eight red flags show up during the HVAC quote process. Any one of them can be innocent, but several together usually signal a contractor cutting corners.

1. Door-to-door sales calls.

The FTC warns that home improvement scammers knock on your door looking for business because they are "in the area," then pressure you for an immediate decision. If someone shows up unannounced offering a "free inspection" or claiming your unit is unsafe, ask for their L&I registration number, verify it, and get a second opinion before you sign anything.

2. The quote happens before the walkthrough.

If a contractor gives you a price over the phone without seeing your home, the number is fictional. HVAC sizing depends on home-specific variables: insulation, window type, ductwork, electrical and layout.

3. No Manual J load calculation.

The Manual J is the standardized load calculation that determines how much heating and cooling capacity your home actually needs. Plenty of HVAC systems are still sized by square footage, a rule of thumb that DOE's Building America guidance says has not changed as energy codes tightened since 2000. A real Manual J takes 30-45 minutes during the quote walkthrough. Skip it, and rule-of-thumb sizing typically leads to an oversized system that short-cycles and dehumidifies poorly.

On a ductless job or new ductwork, ask how each head or duct run was sized, because that takes room-by-room loads (our Manual J guide explains the difference).

4. Pressure to sign same-day.

"This price is only good today" is a sales tactic. Manufacturer pricing and permit fees do not change daily; the contractor's quota does. A reputable contractor leaves the quote valid for 30-90 days.

5. Vague flat-rate pricing without itemization.

A complete heat pump or AC install quote should be at least one page of itemized line items: equipment, labor, permit, electrical, ductwork, startup, warranty and rebates. A single line that reads "Heat pump install" next to one total is hiding something. We covered what should be on a complete quote in our heat pump cost guide.

6. "Special inspector pricing" or "wholesale direct."

"Special inspector pricing" and "wholesale direct" are sales scripts; neither exists. A bid dramatically lower than the others usually means cut corners, lower-tier equipment or a planned mid-project upcharge.

7. No permits pulled.

Every HVAC install in Clark County requires a mechanical permit, from your city or from Clark County outside city limits. The permit means a city or county mechanical inspector checks the work after install. Skipping the permit is illegal, skips that inspection, and can make a future home sale harder. We pull a permit on every install, no exceptions.

8. Financing-first pitch.

"How much can you afford per month?" is the wrong opening question. The right opening is "what does your home need." Financing is a tool; if it leads the conversation, the contractor is optimizing for their close rate, not your project.

The 8 questions to ask every contractor.

Ask every HVAC contractor bidding your job these 8 questions, then compare the answers side by side:

1. "Will you run a Manual J load calculation, and what heating and cooling load did it give for my home?"
2. "What's your Mitsubishi / American Standard / [brand] certification tier? What warranty does that get me?"
3. "Are all your installers W-2 employees, or do you sub out the work?"
4. "Will you pull the mechanical permit, and is that included in the price?"
5. "Can I see your last five finaled mechanical permits?" (Permits are public record with the city or county. Reputable contractors will show them.)
6. "What's the AHRI reference number for the equipment combination you're proposing?" (The AHRI certificate lists the certified SEER2 and HSPF2 for that exact outdoor + indoor pairing, and rebate efficiency bars such as Clark PUD's 7.5 HSPF2 are checked against it.)
7. "What happens if my install fails inspection?" (Good answer: we fix it at no charge until it passes.)
8. "Does my home qualify for a Clark PUD rebate, and who files it?" (Clark PUD's heat pump rebates need a home heated with electricity today. The ducted rebates are paid only through an installer in Clark PUD's Contractor Network; the flat $900 ductless rebate needs only a Washington-licensed installer.)

How to read a quote.

A complete HVAC install quote is roughly one page, double-sided. It should include:

• Equipment specifications: outdoor unit MPN, indoor coil / air handler MPN, tonnage, SEER2/HSPF2, refrigerant type (in Washington, a whole new system installed since January 1, 2026 must use a lower-GWP refrigerant such as R-454B or R-32)
• Labor breakdown: demo of old equipment, install of new, electrical work, line-set, ductwork (if any)
• Permit and inspection: mechanical permit fee (your city, or Clark County outside city limits), electrical permit if needed
• Warranty terms: manufacturer parts warranty period, labor warranty period
• Rebate analysis: Clark PUD rebate value, manufacturer rebate, any other applicable programs
• Net out-of-pocket: the actual number you will pay after rebates
• Timeline: when work will start, how long it will take
• Payment terms: what is due when, including the deposit and what is due at completion

If any of these are missing, ask. If the contractor pushes back on itemizing, that is the answer.

How we compare on this checklist.

Here is where Pacific Peak Mechanical stands on each item in this checklist:

• Licensed and bonded in WA: Yes. License number on every quote.
• EPA 608 certified technicians: Yes, every tech.
• Mitsubishi Diamond Contractor: Yes, 12-year manufacturer warranty available.
• American Standard Authorized Dealer: Yes.
• Manual J on every install: Yes.
• Permits pulled on every install: Yes, through your city or Clark County.
• Direct-hire crew, no subs: Yes. Every installer is a Pacific Peak W-2 employee.
• Itemized written quotes: Yes, in writing after an on-site walkthrough, before any work.
• Rebate filing handled for clients: Yes for Clark PUD's $900 ductless rebate. Clark PUD pays its ducted heat pump rebates only through Contractor Network installers, which Pacific Peak has not joined.
• Reviews: 60+ on Google at 4.9 stars.

Want to put us through this checklist? Request a quote and we will walk through every credential, rebate and line item.

Questions homeowners ask.