Review sentiment: 95/100
Overview
Ac replacement capability is emphasized with right-sized, quiet AC installs. KJ Thomas Mechanical states high-efficiency variable-speed options. The company notes help with Xcel rebate paperwork for Boulder County homes. KJ Thomas Mechanical says same-day response is available for urgent calls. The family-owned crew advertises 40+ years of tradesman experience.
Central AC system replacement for Boulder County homes and light commercial spaces. Family-owned, tradesman-led team with 40+ years of tradesman experience. Financing through Wells Fargo is available for qualified installs. Right-sized, quiet AC installs and Xcel rebate paperwork handling are noted.
vs. Longmont average
| Signal | KJ Thomas Mechanical | Longmont avg | Delta |
|---|---|---|---|
| Google rating | 4.9★ | 4.9★ | matches city average |
| Review volume | 275+ | 1,940+ | -1668 vs avg |
What customers say
Reviewers praise:
clean installsclear communicationtidy workmanship
Pros
Strengths
- High Google rating (4.9★ across 275+ reviews)
When to choose them
- You need same-day AC replacement
- You need same-day or after-hours service
- You need to finance the work
- You have a commercial property
Services
Service area
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); Emergency response: same-day; Financing available.
When should I choose KJ Thomas Mechanical?
Choose them if: You need same-day AC replacement; You need same-day or after-hours service; You need to finance the work; You have a commercial property.
What is the Vouched Score for KJ Thomas Mechanical?
46/100. Top contributing signals: Google Rating 97/100+ Review Sentiment 95/100, Google Review Count 66/100. The score blends public-record signals (BBB, license records), customer review signals (Google, Yelp), and editorial assessment.
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 AC replacement service typically cost when working with a Longmont, CO provider like KJ Thomas Mechanical?
Full AC system replacement typically runs $5,700–$13,550, and AC condenser replacement runs $1,250–$4,350 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 AC Replacement in Longmont, CO?
Yes. KJ Thomas Mechanical lists AC Replacement among its services and serves Longmont, CO and Replacement Longmont, CO. Call +1-303-435-8141 for a quote.
Does KJ Thomas Mechanical do Commercial HVAC in Longmont, CO?
Yes. KJ Thomas Mechanical lists Commercial HVAC among its services and serves Longmont, CO and Replacement Longmont, CO. Call +1-303-435-8141 for a quote.
Does KJ Thomas Mechanical do Emergency HVAC Service in Longmont, CO?
Yes. KJ Thomas Mechanical lists Emergency HVAC Service among its services and serves Longmont, CO and Replacement Longmont, CO. Call +1-303-435-8141 for a quote.
Compare with nearby providers
| Provider | Vouched | Years | |
|---|---|---|---|
KJ Thomas Mechanical (this company) |
— | 4.9★ (275+) | — |
Welzig Heating, Air, Plumbing & Electric ⭐ Highest Vouched Score · ⭐ Honest Replace-vs-Repair · ⭐ Full-System Changeout |
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+ |
Listed in
Explore more
Profile last updated July 28, 2026.