Author profile
Mark Tindall
Lead HVAC Technician & Content Reviewer · 22 years in the HVAC trade
Spokane-based HVAC technician with 22 years of experience in cold-climate heat pump retrofit, gas furnace diagnostics, and IAQ upgrades. Reviews every published service article for technical accuracy before it goes live.
- NATE-certified (North American Technician Excellence)
- EPA Section 608 Universal Refrigerant Certification
- WSHBA Spokane Home Builders Association member
- Washington State L&I plumber/HVAC registration PLMBSPOS842BC
Find Mark on LinkedIn.
Experience and expertise
Mark has spent the last 22 years in the HVAC trade, with the majority of that time in the Spokane market. His specializations are cold-climate heat pump retrofit (Mitsubishi Hyper-Heating, Daikin Aurora, Bosch IDS), gas furnace diagnostics including heat-exchanger integrity assessment, and indoor air quality upgrades for Spokane's recurring wildfire-smoke season.
He reviews every service article and blog post that Spokane HVAC Pros publishes. His review pass checks: technical accuracy of equipment specifications, current Washington State code references, accurate cost ranges from recent invoices in our referral network, and proper application of ACCA Manual J / Manual D / Manual S where sizing matters.
Credentials and certifications
- NATE-certified (North American Technician Excellence) — North American Technician Excellence. The de facto industry standard for HVAC technician competency. NATE-certified techs pass proctored exams on installation, service, and diagnostics across separate air conditioning, heat pump, gas furnace, and air distribution specialties.
- EPA Section 608 Universal Refrigerant Certification — The U.S. EPA's refrigerant handling certification. Required by federal law for any technician who opens an AC or heat-pump refrigerant circuit. Universal type covers all refrigerants.
- WSHBA Spokane Home Builders Association member — Active member of the Spokane Home Builders Association, the regional trade body that advocates for residential construction quality in Spokane County.
- Washington State L&I plumber/HVAC registration PLMBSPOS842BC — Washington State Department of Labor & Industries registration. Verify any contractor at secure.lni.wa.gov. Mark's registration number is on file with the Washington State Department of Labor & Industries.
Knowledge areas
Mark is the named reviewer for content in these areas:
- Heat pump technology (cold-climate, standard, geothermal)
- Gas furnace diagnostics and combustion safety
- Central air conditioning and ductless mini-splits
- HVAC load calculation (Manual J 8th Edition)
- Ductwork design and retrofit (Manual D)
- Indoor air quality and MERV-13 filtration
- Refrigerant handling and recovery (EPA Section 608)
- Washington State HVAC permitting and code compliance
Editorial standards
Every article published on spokanehvac.us goes through Mark's review pass before going live. He verifies technical claims against primary sources (DOE, NEEP, NWS, NATE, ACCA, ASHRAE, EPA, Avista, DSIRE, IRS) and rejects anything that doesn't hold up. The methodology, sources, and formulas sections at the bottom of every page are his work.
For details on our editorial process, AI-use policy, and fact-checking workflow, see our Editorial Policy.
Contact
For corrections, fact-checks, or technical questions about published content, Mark can be reached through the main office at (509) 555-1234 or by submitting a quote request on the Contact page.