
A-1 Heating & Air Conditioning Services
Reliable Comfort Your Family Can Count on
- HVAC Replacement
- HVAC Repair
- Commercial HVAC

Reliable Comfort Your Family Can Count On
A-1 Heating & Air Conditioning
A-1 Heating and Air Conditioning is a residential and commercial heating and Air Conditioning business serving Weld County, Colorado. We partner with you to maintain your equipment, ensuring that you are consistently able to keep your home or business comfortable. No matter what your needs are, we offer a high level of professionalism and top notch customer service to ensure you get exactly what you’re looking for. At A-1 Heating and Air Conditioning Services, we always stand by our work.





What to Expect:
In Need of a Trusted HVAC Company for Your Heating & Air Conditioning Needs?
Learn more about our process for Residential & Commercial HVAC services so you know exactly what to expect when we show up.

What to Expect:
Residential HVAC Service
We recognize that there are many HVAC companies you can choose for your heating and air conditioning needs in Weld County, and it can sometimes feel overwhelming, when you don’t know what kind of service you will receive from an HVAC company. Learn more about the experience you will have from A-1 when you partner with us for your Residential HVAC needs.

What to Expect:
Business HVAC Service
When selecting an HVAC company for your commercial business, you want a company that has the experience needed, to handle complex commercial HVAC issues. Our team has been servicing commercial buildings for their HVAC needs, for over 50 years. Learn more about our commercial HVAC processes, so you can move forward with confidence when partnering with us.
Maintaining your heating and air conditioning unit is key to ensure the health and longevity of your system. With our maintenance plan, you won’t have to worry about your system breaking down right when you need it the most. We’ll care for your unit, keeping it healthy and functioning as intended. Our maintenance plan includes:
- Pre-paid maintenance twice a year
- AC service in spring, furnace service in fall
- Fewer repairs needed
- Extended equipment life
- Restoration of lost efficiency
- 15% discount on repairs
- 24-hour emergency service
- Priority service
- Transferable membership

A-1 Heating and Air Conditioning Services is a residential and commercial HVAC company serving Weld County, Colorado. We partner with you to maintain your equipment, ensuring that you are consistently able to keep your home or business comfortable. No matter what your needs are, we offer a high level of professionalism and top notch customer service to ensure you get exactly what you’re looking for. At A-1 Heating and Air Conditioning Services, we always stand by our work.
Work with Best
Lennox Premier Dealer
- Superior service
- Industry-leading products
- Highly rated for customer satisfaction
Our Services
Our Services
Our Services

HVAC Services
Our expert team at A1 Heating and Air Conditioning Service knows how to inspect, diagnose, and repair HVAC systems. If your ac needs repair, our team will take care of things efficiently to get things running smoothly in no time.

Commercial HVAC

Indoor Air Quality

Maintenance Plan
As your living spaces continue to evolve, so do we.
Innovative HVAC Services in Northern Colorado
Do you need a repair or installation on your heating, air conditioning, or air quality improvement systems? Give us a call. Once we’re done, you’ll never want to leave your home again.
Premium HVAC Solutions for Any Environment:
- Air Conditioning Repair
- Furnace Repair
- Air Handlers
- Ductless Systems
- Commercial Repair
- Fixture and Installment Repair
- Indoor Air Quality
Want to know what your savings could be with a new system?
See Your Home Savings with a new HVAC Unit in Real Time

Quality Results You Can Count On
With an average Google rating of 4.8/5 from over 100 reviews, you can have full confidence that we’ll deliver on our promises. If you’d like to see what A1 Heating and Air Conditioning Services can do for you, take a look at our extensive collection of customer stories.

A Weld County HVAC Company You Can Trust
A well-working furnace and air conditioning system is essential for homes and businesses in Colorado. It’s important to build a long-lasting relationship with a proven company that you can depend on. A-1 Heating and Air Conditioning is locally owned and operated, with decades of experience and loyal clients, many of whom have been with us since the beginning. We build our reputation and clientele with high-quality, honest work, and proven results.
- 970-352-3500
- Contact A-1 Today
- Free Estimates on Furnace & AC Replacements
Send us your heating and air conditioning questions or to set up a time for our team to come out.
Weld County Trusted HVAC Company
We serve clients across the region from our office in Greeley, CO. We are licensed, bonded, and insured.