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AVANT HVAC

Top Pro

Licensed
This pro has verified their business license with Thumbtack.
Licensed
This pro has verified their business license with Thumbtack.

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About
AVANT HVAC INC is your trusted local expert for residential and light commercial HVAC services. From Heater Repairs to Energy Efficient Air Conditioner Installation, we ensure your absolute comfort all year round.
Overview

Current Top Pro

Hired 37 times

Serves Brentwood, CA

Background checked

License verified

3 employees

5 years in business

Business hours

This pro hasn't listed their business hours.

Payment methods

This pro accepts payments via Apple Pay, Cash, Check, Credit card, PayPal, Venmo, and Zelle.

Top Pro status

Top Pros are among the highest-rated, most popular professionals on Thumbtack.

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2023

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2022

Credentials

License verified

C20 – Warm-Air Heating, Ventilating And Air-Conditioning Contractor

License state: CA

Background checked

Passed by Oleg Khafizov on Apr 7, 2026.

Services offered
Work needed
System type

Split system

Packaged system

Other

Building height

Single-level

Two-story

Three-story

High-rise

Projects and media
Projects and media
Reviews

Customers rated this pro highly for professionalism, work quality, and responsiveness.

Exceptional 5.0

52 reviews

5

98%

4

2%

3

0%

2

0%

1

0%

Your trust means everything to us. Learn about our review guidelines.

Read reviews that mention:

pro avatar
Ewa S.

Jun 12, 2026

•

From Google

Oleg was fantastic. His response time on Yelp was less than 1 minutes. It was 100F, he showed up at my house the same afternoon and repaired the AC unit promptly. Highly recommended. Give Oleg a try, you will be glad you did!
AVANT HVAC's reply
Thank you, Ewa, for such a wonderful review!
pro avatar
Jologs M.

Jun 15, 2026

•

From Google

Called 8AM and make appointment 9AM. Showed up on time. Discuss and explained rates. Thats a fact. Very straight forward guy and TRUSTWORTHY. I FOUND MY AC GUY in brentwood. Don't hesitate to give him a call. THANKS a lot OLEG. and thanks for the extra service checking up my other electrical issue.
AVANT HVAC's reply
Thank you so much for your review! I truly appreciate your kind words and your trust in our service.
pro avatar
Srikanth k.

Dec 11, 2021

•

Hired on Thumbtack

An air duct in my attic broke and we were not getting heat. Oleg had an appointment same day and came by and fixed it. He took pictures of the work done and was very professional and knowledgeable. Also, he charged a very reasonable price. I would highly recommend him for HVAC related issues

Details: Not enough airflow / Blocked vents • Less than a week ago • Heating and cooling • Rigid sheet metal • Two-story building • Townhouse

Duct and Vent Repair
pro avatar
SHOUNAK L.

Jan 5, 2023

•

Hired on Thumbtack

Oleg and his colleague worked to relocate & reinstall my AC condenser. They did a great job at a reasonable price in the required timeframe.
I would re-hire & recommend AVANT HVAC.

Details: Repair • Garage • Outside • House

Central Air Conditioning Repair or Maintenance
pro avatar
Ella k.

Jun 30, 2022

•

Hired on Thumbtack

Excellent experience overall - we passed HERS test and city inspection just now. The city inspector said they did solid work. AVANT installed a new A/C condenser (Carrier slim 14 SEER) and replaced all ducts in a two-story house (with flex ducts), and provided permits and HERS tester. I got at least five bids from different contractors in the area and theirs was among the top ones. The work took two days: they worked whole day pretty late on the first day, so we avoided overrun to the third day, and finished about 3pm on the second day. The crew was respectful and pleasant, and cleaned everything up inside and out. AVANT offered 3y warranty on labor. Oleg was my contact, he was very responsive from beginning to end, everything he said always checked out, and I detected no BS (no unnecessary upsells, no convincing not to get a permit, no bugging with phone calls before I made my choice, etc - being a women who hires many contractors I've heard my share). Great experience overall, wold recommend and would re-hire.

Details: Install a new A/C unit • System recommended by the pro • Homeowner or property manager (not done) • Location recommended by the professional • Location recommended by the professional • 2,000 - 3,000 sq ft • Two stories • House

Central Air Conditioning Installation or Replacement
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