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ONzone Heating & Cooling Inc.

Top Pro

Licensed
This pro has verified their business license with Thumbtack.
Licensed
This pro has verified their business license with Thumbtack.
Type of heating system
Heating system problems

Online now

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If you hire this pro, you’re covered by a money-back guarantee. Learn more

About
At Onzone Heating & Cooling, we bring over 24 years of HVAC experience to every project. We service and install residential and commercial heating and cooling systems, providing expert diagnostics, repairs, maintenance, and replacements. Our goal is to solve problems the right way—not simply replace equipment. We take pride in delivering high-quality workmanship, code-compliant installations, honest recommendations, and exceptional customer service. No matter the size or complexity of the job, our team is committed to keeping your home or business comfortable year-round.
Overview

Current Top Pro

Hired 25 times

Serves Pleasanton, CA

Background checked

License verified

3 employees

1 year in business

Business hours

SunClosedMon7:00 am - 8:00 pm

Payment methods

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

Social media

Instagram

Credentials

License verified

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

License state: CA

Background checked

Passed by Oleg Nebrat on Jun 6, 2026.

Services offered
Type of heating system
Heating system problems

No problem, just need maintenance

No heat

Not enough heat

Unusual noises from inside

Building height

Single-level

Two-story

Three-story

High-rise

Projects and media
Projects and media
Reviews

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

Exceptional 5.0

63 reviews

5

100%

4

0%

3

0%

2

0%

1

0%

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

Read reviews that mention:

pro avatar
John k.

Aug 13, 2026

•

Hired on Thumbtack

Two technicians arrived earlier than expected after calling ahead. I was thrilled of course. It's rare that repair folks arrive early. After texting a bunch of HVAC companies these guys were one of few that agreed to do the work. Others said the job was too small. Once they arrived they got right to work. It wasn't a straight forward job so naturally I was concerned. I had nothing to worry about these guys were pros. They were done in less than an hour. I have to say these guys do quality work. They were very meticulous to make sure no air was leaking from my exhaust vent. They checked and rechecked. I was glad that their bread and butter is AC. My unit is on it's last leg. They briefly explained how they would do the work and gave me a ballpark estimate. I will be using these guys in the future. It's a great feeling knowing you have a trustworthy and meticulous technicians when you need them. They will do small jobs as well as large ones. I will gladly recommend them to my friends and family. Thank you Onzone.

Details: Install ducts and vents • 1 - 5 vents • Rigid sheet metal • I'd like the pro to buy the duct(s) and vent(s) • Single-level building • Townhouse • Owner

Duct and Vent Installation or Removal
pro avatar
Apurve C.

4 weeks ago

•

Hired on Thumbtack

These professionals performed well in relocating our HVAC return to lessen airflow noise. They were knowledgeable, friendly, punctual, and enthusiastic about the task. I strongly recommend them for HVAC, electrical, or plumbing projects.
Duct and Vent Installation or Removal
pro avatar
Craig T.

Jun 10, 2026

•

Hired on Thumbtack

We had a great experience with ONzone for an A/C issue we were facing. They were quick, professional, and responsive. We highly recommend their services for any HVAC needs!

Details: Routine maintenance • Attic • Townhouse • Owner

Central Air Conditioning Repair or Maintenance
pro avatar
Jennifer M.

Jun 5, 2026

I had a heat pump installed only two years ago, and recently I started having refrigerant leak issues. The original installer came out before, but the problem kept coming back.

I decided to call Onzone Heating & Cooling for a second opinion, and I’m glad I did. The technicians were extremely professional, thorough, and honest. They took the time to inspect the entire system, found issues that had previously been overlooked, and clearly explained everything they found. They even showed me the problem areas and walked me through the repair process.

It’s refreshing to work with a company that pays attention to detail and truly cares about the quality of their work. Based on my experience so far, I would highly recommend Onzone Heating & Cooling to anyone looking for knowledgeable and trustworthy HVAC professionals.
pro avatar
Roma G.

Jun 5, 2026

•

From Google

Oleg did an excellent job with our HVAC system. He was professional, knowledgeable, and very easy to work with. He arrived on time, carefully diagnosed the issue, and explained the repair options in a clear and honest way.The work was completed efficiently and with great attention to detail. Everything was left clean, and the system is now running perfectly. It's clear that Oleg takes pride in his work and genuinely cares about providing quality service.I highly recommend Oleg to anyone looking for a reliable and experienced HVAC specialist. I would not hesitate to hire him again for future heating and air conditioning needs.
ONzone Heating & Cooling Inc.'s reply
Roma, appreciate it! Great to hear the work came out clean and the system's running right. Always glad to help! -Onzone Heating and Cooling, HVAC Service
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