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Your Trusted HVAC Partner in Marion, VA
Custom Air has built a reputation for excellence in heating, cooling, and indoor air quality solutions. With over four fully equipped service trucks operating across Smyth, Wythe, Grayson, and surrounding counties, our team delivers prompt, reliable service backed by continuous training in the latest HVAC technologies. Our technicians are certified professionals who prioritize customer education, transparent communication, and emergency support available 24/7.

We maintain rigorous quality control through regular equipment calibration and adherence to manufacturer specifications, ensuring optimal system performance for residential and commercial clients alike.
Services
HVAC Installation Preventive Maintenance Air Duct Cleaning Commercial HVAC Standby Power Generators Indoor Air Quality System Upgrades Emergency Repairs Geothermal Systems Thermostat Programming
Highlights and features
  • We offer 24/7 emergency service for urgent HVAC needs
  • Our technicians attend ongoing manufacturer-certified training programs
  • We provide factory-authorized warranty coverage on all installations
  • We maintain four fully stocked service vehicles for rapid response
  • We offer Carrier Infinity system customization with zoning capabilities
What people say
Knowledgeable and reliable Excellent work Prompt and efficient service Professional and friendly Great customer service
Update Listing
Services
HVAC Installation
Custom Air specializes in complete HVAC system installations using Carrier equipment. Our process includes load calculations, system design, and proper equipment sizing for optimal efficiency. We use quality materials like Hart & Cooley ductwork and Owens Corning insulation to ensure long-term performance. Our installers receive ongoing training to maintain technical proficiency with the latest HVAC technologies.
Preventive Maintenance
Our annual maintenance program includes comprehensive inspections and adjustments for heating and cooling systems. Services cover combustion analysis, refrigerant checks, electrical connections, and airflow optimization. Regular maintenance extends equipment lifespan, improves energy efficiency, and helps prevent unexpected breakdowns during peak operating seasons.
Air Duct Cleaning
Professional air duct cleaning services remove contaminants from HVAC ductwork systems. Our technicians use specialized equipment to clean supply and return ducts, improving indoor air quality and system efficiency. We follow industry standards for thorough cleaning of registers, grilles, and internal duct surfaces.
Commercial HVAC
Custom Air provides commercial HVAC solutions including rooftop units, refrigeration systems, and custom sheet metal fabrication. Our services cover installation, maintenance, and repair of commercial heating and cooling equipment. We specialize in systems for office buildings, retail spaces, and industrial facilities.
Standby Power Generators
We install and service automatic standby power generators that protect against power outages. Our systems automatically activate during utility failures, maintaining essential functions like heating, cooling, and refrigeration. Generators integrate with existing HVAC systems for uninterrupted operation during emergencies.
Questions
Do you offer emergency HVAC service outside regular business hours?
Yes, we provide 24/7 emergency service for urgent heating and cooling system failures. Our technicians respond promptly to after-hours service calls.
What areas do you service for HVAC installations?
We serve Smyth, Wythe, Grayson counties and surrounding areas in Virginia, including Abingdon, Chilhowie, Marion, and Wytheville.
Can you help with financing HVAC system replacements?
Yes, we offer financing options through Bank Marion for qualified customers to make HVAC upgrades more affordable.
What brands of HVAC equipment do you install?
We are a Carrier Factory Authorized Dealer and install Carrier heating and cooling systems, including air conditioners, heat pumps, and furnaces.
Do you service HVAC systems from other brands?
Yes, our technicians service and repair all major HVAC brands, not just Carrier equipment.
What preventive maintenance services do you offer?
We provide seasonal tune-ups for heating and cooling systems, including equipment inspections, cleaning, and performance optimizations to maintain efficiency.
Reviews (5)
Matt Graybeal
May 15, 2021 Report
Had them out to my house in May give me an estimate and a diagnosis, gave me a diagnosis supposed to call me back about an estimate on how much exactly it would cost never called. So I didn't pay, came to my house today demanding payment, Not sure what company in the year 2020 doesn't accept credit cards apparently only cash or check.
Rick & Heather H.
Mar 24, 2021 Report
10 stars We had a new heat pump installed yesterday. Your install team was very efficient, hard working, and knowledgeable. Their attention to detail did not go unnoticed. They cleaned up after themselves and you would never even know they had been here. Plus all the guys were super nice! I want to thank each of them for their hard work and dedication to the job! And thank you Brian for all your assistance along the way!
Lynda Helton
Feb 10, 2021 Report
Brian, Stuart and their team were great to work with as we were replacing the HVAC in an older home we were renovating. They worked with us on options to meet our specific budget and space needs. Everyone who worked on this project was very polite and knowledgeable of the specifics of the project. Thank you for a job well done!
Megan Blevins
Dec 29, 2020 Report
Had difficulty with both the technician and the manager to the extent that I had to hire a different company to finish the job. Custom Air would benefit greatly if they had any concept of "The company works for the client, the client does not work for the company." Custom Air came out and didn't do what I asked and then argued with me about it, so I had to call another company to come out. The other company did exactly what I asked, the unit was fixed, they got paid on the spot and received a fantastic review from me.
Doug and Kate Wright
Dec 12, 2020 Report
Just a shout out to Brian, Stuart and the crew. You recently did a Heat / Pump install for us. You guys are so knowledgeable and work so diligently to make us satisfied. Excellent customer service. Sorry I cant remember the four fellows involved but Brian if you dont mind, can you list their names here? They sure are an asset to your organization.