HVAC Contractor in Marlborough, MA

Reliable 24-Hour Emergency AC & Heating Repair, Installation & Maintenance 

Since 1944, Cotti-Johnson has specialized in the installation, maintenance, and service of residential air conditioning and heating systems.

Our decades of experience and dedication to customer service qualify us to represent the premier manufacturers in the industry—American Standard, Bosch, Bryant, and Mitsubishi Electric.

HVAC Services in Marlborough

As a family-owned business that’s been around for decades, we pride ourselves on our full range of heating, air conditioning, and indoor air quality services. And, because HVAC problems often occur outside of normal operating hours, we offer after-hours service and same-day repairs. When we say we’re here for you, we mean it! 

Our HVAC services include but are not limited to: 

• Boilers 
• Cooling towers 
• Condenser loops 
• Ductwork 
• Gas, oil, and electric furnaces 
• General building and mechanical services 
• Heat pumps
• Pipe and gas fittings 
• Sheet metal fabrication 

Water Heater Services in Marlborough

In addition to our HVAC services, Cotti-Johnson can also repair, replace, or install a new water heater in your home or business. We service all water heater brands and models, including both tank and tankless systems. 

If you’re looking to install a new water heater, or replace an existing one, we can advise you on the best make and model for your needs. Reach out today for more information.

Call (774) 768-5154 or contact us online to schedule fast & dependable service with our HVAC contractors in Marlborough, MA.