Marshfield Whole Home Peace of Mind

Preventative maintenance is the key to keeping your home's systems in excellent working order! We'll help you get the longest possible life from your systems and identify any small equipment repairs before they have a chance to turn into larger problems.

Heating & Air Conditioning Services in Marshfield

Residential & Commercial HVAC Services You Can Count On

When you need HVAC solutions in Marshfield, MA, the only name you need to know is Cotti-Johnson. With a commitment to excellence and a passion for customer satisfaction, Cotti-Johnson brings you a comprehensive range of heating and cooling services to ensure optimal comfort in your home or business. We've been locally trusted since 1948 and are highly recommended by countless happy customers throughout the area.

Learn more about our top-notch offerings in air conditioning, heating, ductless mini splits, heat pumps, and indoor air quality. Contact us today!

Marshfield Air Conditioning Services: AC Repair, Installation & Maintenance

Beat the summer heat with Cotti-Johnson's state-of-the-art air conditioning solutions. Our expert Marshfield air conditioning technicians specialize in installing, repairing, and maintaining air conditioning systems to keep your indoor spaces cool and comfortable. From central air systems to energy-efficient options, we tailor our services to meet your specific needs. Count on us for timely repairs and regular maintenance to ensure your AC unit operates at peak efficiency.

Heating Service in Marshfield: Your Furnace Repair & Installation Experts

As the temperatures drop in Massachusetts, Cotti-Johnson is here to keep you warm and cozy. Our Marshfield heating services encompass everything from furnace installations and boiler repairs to oil to gas heating conversions. We understand the importance of a reliable heating system during the chilly New England winters, and our skilled professionals are dedicated to providing prompt and effective services to keep your home warm and inviting.

Ductless Mini Splits

Discover the flexibility and energy efficiency of ductless mini splits with Cotti-Johnson. Perfect for both residential and commercial spaces, these systems allow for personalized climate control in each room. Our team excels in the installation and maintenance of ductless mini splits, ensuring that you enjoy optimal comfort without compromising on energy efficiency. Experience the freedom to set individual temperatures and save on utility bills with our cutting-edge solutions.

Heat Pumps

Cotti-Johnson introduces eco-friendly heating and cooling solutions with our advanced heat pump services. Harness the power of these efficient systems to keep your indoor environment comfortable year-round. Our Marshfield HVAC experts specialize in the installation and maintenance of heat pumps, providing you with a cost-effective and environmentally friendly alternative for climate control. Trust us to optimize your heat pump's performance and extend its lifespan through regular servicing.

Indoor Air Quality

Breathe easier with Cotti-Johnson's indoor air quality services. We firmly believe in the importance of clean and healthy air in your living or working spaces, which is why we are committed to creating indoor environments that promote well-being by reducing allergens, pollutants, and other airborne contaminants. Call today to learn more about our IAQ products and services, including air purification systems, electronic air cleaners, and more.

Marshfield's Heating & Cooling Experts Since 1948

At Cotti-Johnson, we take pride in being Marshfield's go-to HVAC experts. Whether you need reliable air conditioning, efficient heating, ductless mini splits, heat pumps, or enhanced indoor air quality, we have you covered. Our dedicated team is committed to delivering unparalleled service, ensuring your comfort and satisfaction. 

Contact Cotti-Johnson today to schedule your HVAC service appointment in Marshfield, MA.

Keeping Customers
Cost Effective
Special Offers

Why Cotti-Johnson?

Learn why our team of experts is the best choice for all your heating, cooling, electrical, and water heater needs.
  • Service On Time
  • Warranties on Parts & Labor
  • Customer Satisfaction Guaranteed
  • Family Owned & Operated
  • Honest Pricing
  • 70+ Years of Experience
Protect What’s Most Important

Our team’s commitment to solving our community’s pest problem is the foundation of our company. With our team, you can say goodbye to unwanted pests for good.