Trust Your Local Heating & Cooling Experts.

Our experienced team of technicians is proud to serve Cape Cod since 2010.


Focused on extraordinary, clean, professional service, and maintenance.

Located in Sandwich Massachusetts, High Efficiency LLC was founded by Craig Bishop in 2010. Fully licensed and insured, High Efficiency is focused on providing residential and commercial clients with extraordinary, clean, professional service and maintenance for their heating and cooling systems. We are dedicated to providing each and every customer with our exceptional knowledge and superior equipment for all their HVAC needs.


Protect Your Home & Business with an Air Purification System

High-Efficiency LLC Air Purification products can help reduce contaminants in the air of your home or business. Our products can keep your family, loved ones, and staff protected from the virus spreading, including COVID-19. Our Air Cleaners and HVAC filters are designed to add a layer of protection to your home or business from pollutants like dust, dirt, mold, mildew, and pollen. See why our products can bring quality air to your home or business.

Experience the High Efficiency Difference.

Special offers

Explore our special offers and services

Our Commitment

We stand behind our work. Guaranteed!
SIMPLE, QUICK & convenient

Making your comfort our priority since 2010.

Speak to our trained, dedicated, and skilled staff about your HVAC & plumbing needs. Our team will evaluate your project and provide an estimate and timeline to complete your request on time!

Real customers, real stories.

Craig is the BEST!!!! He always gets the job done with a smile and is very knowledgeable, efficient, cost effective and leaves the work area clean ; ) Look no further for your HVAC needs!! Thought Alan was wonderful. He did a great job. Very efficient, neat, knowledgeable.
Mickey M
Sandwich, MA
guaranteed worry-free maintenance

Making your comfort our priority since 2010.

We know repairs can be expensive so we offer Service Agreements to help cut your costs.


The High Efficiency Advantage

See How we can help save money on your next project

Browser our specials and discounts to see how High Efficiency can save you money!