Mon-Clair Heating and Cooling LLC

Top Pro

Licensed

This pro is currently not available for Central Air Conditioning Installation or Replacement

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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 210 times

Background checked

License verified

2 employees

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

Work needed

Install new A/C units

Replace existing A/C units

Remove old A/C units

Install ducts and vents

System type

Split system

Packaged system

Other

Building height

Single-level

Two-story

Three-story

Projects and media

Reviews

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

Excellent 4.9

110 reviews

5

97%

4

1%

3

1%

2

0%

1

1%

Read reviews that mention:

Julene T.

Jun 16, 2026

•

Hired on Thumbtack

The gentlemen that came to resolve my AC issues were excellent! Very professional, on time, very communicative! I will be using them again if the need arises. They showed up when they said they would, fixed the issue, and left everything clean and orderly!

Details: Replacement • Central heating or cooling • House • Owner

Thermostat Installation or Repair

Sanjay f.

Jun 8, 2026

•

Hired on Thumbtack

Father & Son HVAC working together was impressive to me They were professional, honest, and very knowledgeable from start to finish. They arrived on time, quickly diagnosed the issue, and explained everything clearly before beginning any work. The quality of their service was excellent, and they made sure everything was working perfectly before they left.

Details: Routine maintenance • Routine maintenance • Outside • House • Owner

Central Air Conditioning Repair or Maintenance

Bernadette J.

May 10, 2026

•

Hired on Thumbtack

Prompt, responsive, professional and overall top-tier quality service across the board. Nick is definitely our guy going forward with any future AC needs!

Details: Install a new A/C unit • As recommended by the professional • I already have the A/C unit • As recommended by the professional • Location recommended by the professional • 2,000 - 3,000 sq ft • Three stories • Townhouse

Central Air Conditioning Installation or Replacement

Rhina L.

Jun 13, 2026

•

Hired on Thumbtack

Details: Repair • Only warm air is blowing from the vents • Basement • Outside • House • Owner

Central Air Conditioning Repair or Maintenance

Mr f.

Jan 21, 2026

•

Hired on Thumbtack

Details: Replacement • Central heating or cooling • Condo/Apartment • Homeowner

Thermostat Installation or Repair

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.