Mon-Clair Heating and Cooling LLC

Top Pro

Licensed

$80/service call

Estimated price

Select a service

Zip code

Scheduling

Air handler location

A/C services needed

Responds in about 36 min

Thumbtack Guarantee

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

About

Hi my Name is Nick Antonas owner of Mon-Clair Heating and Cooling, we are locally owned and operated. I have 20+ years of experiece in the HVAC industry. We are licensed and insured. We believe in doing quality work at an affordable price. We are an American Standard heating and Cooling dealer as well as a Mitsubishi Mini-Split dealer, but we work on all makes. We look forward to serving you for your residential and light commercial heating and cooling needs. We offer 10% off for military/First Responders and 5% off for Senior Citizens.

Overview

Current Top Pro

Hired 190 times

Serves Millstadt, IL

Background checked

License verified

1 employee

3 years in business

Business hours

SunClosedMon8:00 am - 6:00 pm

Payment methods

This pro accepts payments via Cash, Credit card, and Square cash app.

Top Pro status

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

2025

Credentials

License verified

HVAC

License region: St. Louis, MO

Background checked

Passed by Nicholas Antonas on Jan 26, 2025.

Services offered

A/C services needed

Property type

House

Condo/Apartment

Townhouse

Business

Projects and media

Reviews

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

Excellent 4.9

100 reviews

5

98%

4

0%

3

1%

2

0%

1

1%

Read reviews that mention:

Jeff W.

Dec 16, 2025

•

Hired on Thumbtack

Details: Furnace • Basement • Single-level building • House

Heating System Repair or Maintenance

Harvey b.

Dec 11, 2025

•

Hired on Thumbtack

Mon-Clair Heating and Cooling did an excellent job. They showed up on time and quickly diagnosed what was needed on my very old furnace that had been off for two years. The technician cleaned the system, made the necessary adjustments, and got everything running again. I really appreciate that he focused on the repair and didn’t try to upsell anything. Honest, skilled, and dependable — highly recommended!

Details: Furnace • Pilot light is out • No heat • Basement • Single-level building • House

Heating System Repair or Maintenance

Sylvia H.

Dec 2, 2025

•

Hired on Thumbtack

Details: Furnace • No heat • Closet • Three-story building • Condo or apartment

Heating System Repair or Maintenance

Robyn W.

Nov 7, 2025

•

Hired on Thumbtack

Details: Heat pump • Leaking • Single-level building • House

Heating System Repair or Maintenance

Lee E.

Aug 21, 2025

•

Hired on Thumbtack

Was very responsive here on the platform, got out to me early, quickly identified and fixed my leak issue and seemed thorough and diligent in the general maintenance I asked for a follow-up. Nice causal but professional experience. Pricing was also on point with what I was quoted by others.

Details: Repair • Outside • House

Central Air Conditioning Repair or Maintenance

FAQs

What should the customer know about your pricing (e.g., discounts, fees)?
We charge an $90 service call fee to diagnose your issue. Parts and labor are extra. Standard 1" filter replacement is $10. We offer a 10% discount for Military and First Responders. We also offer a 5% discount for Senior citizens.
What is your typical process for working with a new customer?
We call the customer and set up an appointment for a 2 hour time block that meets their and our availability.
What education and/or training do you have that relates to your work?
I have a HVAC certificate from Jefferson College in Hillsboro MO which i received in the year 2000. I also carry a St. Louis County and City Journeyman's License.