KJ Thomas Mechanical
Longmont, CO HVAC · #4 of 3 · 40+ yrs
ⓘVouched Score is calculated from publicly available signals: Google rating & review count, Yelp rating, BBB grade, review sentiment, years in business, local search ranking, and provider website content. Not a guarantee of service quality.Embed this score
⏱ 40+ years in business
Review sentiment: 93/100
Overview
KJ Thomas Mechanical lists dedicated mini-split system installs and retrofits. The company notes 40+ years of combined tradesman experience. The team helps homeowners apply for Xcel Energy rebates in Boulder County. KJ Thomas states they provide same-day emergency response and clear scheduling texts.
Residential and light-commercial HVAC in Longmont, focused on heat pumps and mini-split installations. Mini-Split Systems is listed as a named specialization on their site. Financing Available is offered through Wells Fargo for installs. Emergency Response is advertised as same-day for urgent repair calls.
Score breakdown
Longmont, CO HVAC average is 85/100. Ranks #4 of 3 listed HVAC providers in Longmont, CO.
Editorial Review
72
46%
Google Rating
97
17%
Local Search Rank
25
9%
Review Sentiment
93
15%
Years in Business
100
4%
Review Volume
66
9%
Composite of public-record signals (BBB, license records), customer review signals (Google, Yelp), and editorial assessment of provider profile. See full methodology →
vs. Longmont average
| Signal | KJ Thomas Mechanical | Longmont avg | Delta |
|---|---|---|---|
| Vouched Score | 76/100 | 85/100 | -9 vs avg |
| Google rating | 4.9★ | 4.9★ | matches city average |
| Review volume | 275+ | 1,940+ | -1668 vs avg |
| Years in business | 40+ | 22+ | +18 vs avg |
What customers say
Reviewers praise:
tidy installsclear schedulingfast emergency responseparts stocked for repairs
Pros
Strengths
- High Google rating (4.9★ across 275+ reviews)
- Long-established (40+ years in business)
When to choose them
- You need same-day or after-hours service
- You need to finance the work
- You prefer a family-owned operation
- You value a long-tenured local operator (40+ years in business)
Services
- Mini-Split Systems — Mini-split installation and service — typically ductless, used for additions or zoned comfort.
- AC Repair — Diagnostics and repair of central air conditioning systems — refrigerant leaks, capacitor and contactor failures, condenser fan motors, and thermostat issues.
- Furnace Repair — Repair of gas and electric furnaces — ignition systems, blower motors, heat exchangers, control boards, and flame sensors.
- HVAC Installation — Full HVAC system installation including indoor and outdoor equipment, ductwork tie-in, and refrigerant work.
- Emergency HVAC Service — After-hours emergency response for no-cool and no-heat calls.
- Commercial HVAC — Commercial HVAC service for offices, retail, and light-industrial spaces — rooftop units, package units, and split systems.
Service area
Longmont, COhome
Contact & hours
📞
🌐
✉️
📍
🕒
Call for hours
Frequently asked questions
What are the pros of KJ Thomas Mechanical?
Based on public records and customer reviews: High Google rating (4.9★ across 275+ reviews); Long-established (40+ years in business); Emergency response: same-day; Financing available; Specializes in mini split.
When should I choose KJ Thomas Mechanical?
Choose them if: You need same-day or after-hours service; You need to finance the work; You prefer a family-owned operation; You value a long-tenured local operator (40+ years in business).
What is the Vouched Score for KJ Thomas Mechanical?
76/100. Top contributing signals: Years In Business 100/100, Google Rating 97/100+ Review Sentiment 93/100. The score blends public-record signals (BBB, license records), customer review signals (Google, Yelp), and editorial assessment.
How long has KJ Thomas Mechanical been in business?
KJ Thomas Mechanical has been operating for 40+ years in Longmont, CO.
How can I contact KJ Thomas Mechanical?
Call KJ Thomas Mechanical at +1-303-435-8141. Address: 6175 Trevarton Dr, Longmont, CO 80503, USA.
What does HVAC service typically cost when working with a Longmont, CO provider like KJ Thomas Mechanical?
AC repair typically runs $155–$675, and full AC system replacement runs $5,700–$13,550 in Longmont, Colorado. These are area-wide market estimates, not KJ Thomas Mechanical's quotes. For an exact price, request a written estimate from KJ Thomas Mechanical.
What pricing terms does KJ Thomas Mechanical publish on their website?
KJ Thomas Mechanical's website publishes: Financing available. Promotions and plans change — confirm currently-available terms with KJ Thomas Mechanical before acting.
Does KJ Thomas Mechanical do Mini-Split Systems in Longmont, CO?
Yes. KJ Thomas Mechanical lists Mini-Split Systems among its services and serves Longmont, CO. Call +1-303-435-8141 for a quote.
Does KJ Thomas Mechanical do Heat Pump Service in Longmont, CO?
Yes. KJ Thomas Mechanical lists Heat Pump Service among its services and serves Longmont, CO. Call +1-303-435-8141 for a quote.
Does KJ Thomas Mechanical do AC Repair in Longmont, CO?
Yes. KJ Thomas Mechanical lists AC Repair among its services and serves Longmont, CO. Call +1-303-435-8141 for a quote.
Compare with nearby providers
| Provider | Vouched | Years | |
|---|---|---|---|
KJ Thomas Mechanical (this company) ⭐ Rebates & Tax Credits |
76/100 | 4.9★ (275+) | 40+ |
Welzig Heating, Air, Plumbing & Electric ⭐ Highest Vouched Score · ⭐ Smart Thermostat Install · ⭐ Free Estimates |
85/100 | 4.9★ (1,445+) | 32+ |
M and M Heating, Cooling, Plumbing and Electrical ⭐ Highest Vouched Score · ⭐ Best for Heat-Exchanger Replacement · ⭐ Best for Gas Valve & Combustion Repair |
91/100 | 4.9★ (3,520+) | 25+ |
| 78/100 | 4.8★ (860+) | 10+ |
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Profile last updated July 28, 2026.