Reliable Heating & Cooling for Every Colorado Season
From installation to emergency repairs, A Plus Heating & Air keeps your home comfortable year-round with honest service and expert craftsmanship.
10+
Years of Service
7
Days a Week
100%
Licensed & Insured
A+
BBB Accredited
Comprehensive HVAC Services
From routine maintenance to emergency repairs, we keep Northern Colorado homes comfortable in every season.
Service & Repair
Expert repair on all makes and models to keep your home comfortable year-round.
System Installation
Tailored HVAC installation solutions with Lennox products for maximum efficiency.
Maintenance Plans
Prevent costly repairs with comprehensive maintenance and exclusive member benefits.
Air Filtration
Advanced AprilAire systems for cleaner indoor air — radon detection, humidity control & more.
Furnace Service
Expert furnace installation and maintenance for peak heating performance.
Emergency HVAC
Available 7 days a week, 7AM–10PM for urgent heating and cooling emergencies.
Family Values, Expert Craftsmanship
Established in 2014 in Berthoud, Colorado, A Plus was built on the principle that HVAC service should be honest, reliable, and personal. When founder Darren Knoll approached retirement, he passed the torch to his cousin Zach Karre — who shares the same commitment to doing things right.
Today, Zach leads a dedicated team that treats every home like their own. As a proud Lennox distributor and AprilAire preferred vendor, we bring top-tier equipment and expertise to every job.
Proudly Serving Northern Colorado
From Fort Collins to Longmont, we're your local HVAC experts.
Trusted Certifications & Partners
Ready to Stay Comfortable Year-Round?
Schedule your service today and experience the A Plus difference — honest, reliable HVAC care from a team that treats you like family.