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A1 HEATING & COOLING -MCKELLAR SERVICES

$80/service call

(waived if hired)

Scheduling

Responds within a day

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

About
A1 HEATING & COOLING-MCKELLAR SERVICES Heating & Air Conditioning has been dedicated to providing reliable, professional service to customers in CRSA and the surrounding areas. As a small team, we take pride in treating every home with care, offering honest communication and dependable workmanship on every job. With several years in business and a focus on superior customer service, we work hard to earn your trust and keep your system running smoothly and efficiently. If you’re looking for a local heating and cooling company that values quality and respects your time and home, contact A1 HEATING & COOLING-MCKELLAR SERVICES Heating & Air Conditioning to schedule your service today.
Overview

Hired 3 times

Serves Aiken, SC

Background checked

5 employees

7 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, Square cash app, Venmo, and Zelle.

Social media

Facebook, Instagram

Services offered
A/C services needed
Property type

House

Condo/Apartment

Townhouse

Business

Projects and media
Projects and media
Reviews

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

Exceptional 5.0

24 reviews

5

100%

4

0%

3

0%

2

0%

1

0%

Read reviews that mention:

pro avatar
Shem H.

May 16, 2026

•

From Google

Mark is an absolute professional. He designed and installed a one-of-a-kind ventilation system for my cigar lounge, skillfully navigating a unique mixed residential and commercial installation. He was creative and knew exactly what specialized equipment setup the space required. The work was not just done in a timely manner but he was also responsive, reliable, and great to work with. Most importantly my customers are incredibly impressed with the air quality in our business. He has definitely added 5 star quality.If you need specialized HVAC work done right, Mark is your guy. Thank you!
pro avatar
Lamar M.

May 24, 2026

•

Hired on Thumbtack

Great overall experience. The tech was knowledgeable and kept me informed.

Details: Routine maintenance • Attic • Two-story building • House • Owner

Heating System Repair or Maintenance
pro avatar
Wannetta L.

May 14, 2026

•

From Google

I highly recommend A1 Heating and Cooling! Mark was extremely professional, knowledgeable, and honest throughout the entire process. He took the time to explain everything clearly and walked me through what was needed for both units using visuals, which really helped me understand the issues and recommended repairs.What stood out the most was his dedication and customer service. He even traveled from South Carolina to North Carolina to help with my home. That level of commitment is hard to find these days. I truly appreciate the time, effort, and professionalism he provided. If you need someone reliable and thorough, definitely give him a call!
pro avatar
Aiken T.

May 13, 2026

•

From Google

A1 Heating and Cooling provided amazing service from start to finish. They were professional, honest, and showed up on time. The technician explained everything clearly and made sure the job was done right. My system is working better than ever, and the whole experience was stress-free. I highly recommend A1 Heating and Cooling to anyone looking for reliable and quality HVAC service!
pro avatar
Keena A.

May 13, 2026

•

From Google

Great, reliable, and affordable services. Mark is very knowledgeable with the work that he performs. I highly recommend him for HVAC services.
Credentials
Background Check

Mark Mckellar

FAQs

  • How did you get started doing this type of work?

    I started in the HVACR industry by attending Aiken Technical College while working during the day and taking night classes. Over the years, I worked my way from installer to lead installer, service technician, service manager, and commercial service manager. That hands-on experience in residential, commercial, and refrigeration systems gave me the knowledge and confidence to build MCKELLAR SERVICES and provide customers with reliable, professional solutions.

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