AB3 Mechanical LLC

AB3 Mechanical LLC Primarily responsible for performing installs, repairs and maintenance to a variety of equipment/HVAC systems.

02/12/2026
02/12/2026

Looking for a dependable commercial HVAC contractor you can trust?
We provide professional HVAC service and support for property managers, facility managers, and general contractors, including: ✔ HVAC service & repairs
✔ Preventive maintenance programs
✔ Troubleshooting & diagnostics
✔ Fast, reliable response
We’re a locally owned HVAC company known for clear communication, consistent scheduling, and quality work — without the big-company runaround.

📍 Serving St. Louis City & County

📞 Call or message us today @ 314 712-0463

02/12/2026

We provide commercial mechanical services including [HVAC / boilers / etc.] and currently support several properties in the area. If you ever need an additional contractor or backup coverage, we’d be happy to help.

Please feel free to reach out anytime.

314 712-0463

Grandson is on vacation
08/01/2025

Grandson is on vacation

This install has to be going on 15 years old now
01/22/2025

This install has to be going on 15 years old now

Digging out today, but running service calls
01/06/2025

Digging out today, but running service calls

03/15/2024

We are committed to offering our customers all of the HVAC services they need while delivering quality service and repairs.

Address

Barnhart, MO
63012

Opening Hours

Monday 7:30am - 5:30pm
Tuesday 7:30am - 5:30pm
Wednesday 7:30am - 5:30pm
Thursday 7:30am - 5:30pm
Friday 7:30am - 5:30pm

Telephone

+13147120463

Website

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