High Efficiency

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378 Route 130
Sandwich, MA 02563
+1 (508) 825-3695
http://high-efficiencyllc.com
Stay comfortable without running up big bills by choosing High Efficiency LLC Mechanical Contractors as your HVAC company. We specialize in energy-efficient HVAC and plumbing installation, including efficient furnaces and oil-to-gas conversions. High Efficiency LLC Mechanical Contractors is a full-service HVAC company you can rely on for energy-efficient plumbing and HVAC installation and services in the West Yarmouth, Massachusetts, area. Our mission is to provide the highest-quality and most cost-effective solutions for combatting rising energy costs for our clients. Employing the latest in technologically advanced equipment and our very own custom-developed techniques, we work on all aspects of heating, cooling, and plumbing. We also install and repair hot water boilers, heat pumps, ductless air conditioning systems, gas furnaces and furnace upgrades.

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3.021 reviews
Scott D.
12/18/2024

excellent communication , they did what they said they were going to when they said it ! very reliable. first class operation . thank you Scott

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Christine Q.
7/21/2025

The initial installation seemed very professional and worked as expected after the 16k investment. This is year 4 of the 12 year warranty period and we had to buy window air conditioners as the...

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Joe D.
5/15/2024

We had a new furnace and heat pump installed at our home. Shamus, Eric and Ryan did a great job. They answered every question we had about the new system. It was a pain less install. The new...

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Melinda W.
3/11/2024

This company is so unprofessional. They do not give any upfront pricing....they came out 3 times and never resolved my issue...they replaced supposidly cheap parts, without my knowledge, consent...

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Kim P.
4/23/2023

Wow, hired these guys to come look at my split AC. I wasnt' home but my room mate was. According to my surveillance cameras they over charged me for a 1/2 hour, and their rate was $269.00/hour...

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