# High Efficiency

**Trade:** HVAC / Heating & Cooling · **Address:** 378 MA-130, Sandwich, MA 02563 · **Phone:** (508) 825-3695 · **Website:** http://high-efficiencyllc.com/ · **Languages:** English

**Rating: 3.6/5** (high confidence) — from 215 reviews across 6 sources. A 0–5 star rating built from what customers and the public say (every review and mention weighted by where it was posted, how old, how detailed and how credible it is, shrunk toward a 3.5★ baseline when evidence is thin) plus what the record shows (Reddit recommendations or warnings, a registry-verified licence, how recently they were reviewed, customer work photos, BBB grade, negative news, a revoked licence). Positive record counts only as far as the reviews have earned it; penalties count in full. Confidence describes how much weighted evidence stands behind the number, never the number itself: low when fewer than about five normal reviews' worth of weight (or mentions only) support it, medium up to about twenty, high beyond that across at least two sources. An operator flag for a suspicious review pattern caps a rating at 3.5★ and marks it low.
92% of sentiment-scored reviews read net-positive. Last 6 months: 31 reviews, 2 negative.

## The honest read

High Efficiency is a Sandwich-based HVAC and plumbing contractor that works across Cape Cod, the Islands and the South Shore. It says it was founded in 2010 by Craig Bishop, and it is one of the larger outfits on the Cape — big enough to run multi-day installs with its own crews and its own Mass Save energy division, which is why it turns up so often on heat pump and mini-split jobs.

The technicians are the strongest part of this record, and it is not close. Reviewers name them individually — Patrick, Sebastian, Aaron, Joshua, Eric, Ryan — and describe careful, well-explained work: boot covers to keep sand off the carpet, a condenser levelled on blocks unasked, an attic heat supply run through a narrow cathedral ceiling. A reviewer who worked in HVAC for thirty years called a multi-zone duct, furnace, heat pump and mini-split renovation top-notch work in a July 2025 review.

They are genuinely quick in a crisis. In a March 2026 review a homeowner with an unsafe old hot water tank called late on a Monday and had a new code-compliant system by Wednesday afternoon; another described a system condemned mid-service call, with sales sent out the same visit and the install expedited.

The complaints are just as consistent, and they are about the office rather than the trade. Reviewers describe hard-to-make appointments, an appointment window nobody showed up for, and installers given wrong information by the office. In an August 2026 review a customer said a part took a full month to order, leaving them most of the summer without working AC despite repeated follow-up calls, and a May 2026 reviewer alleged overpricing, poor work and damage to their house.

Pricing is the other recurring theme. A 2023 reviewer itemised $250 an hour plus a $50 zone charge for a two-mile trip, and $575 for a twenty-minute on-call visit; a 2024 reviewer said a boiler quote came in 40% above another for identical scope and equipment. Others say the opposite — a 2023 reviewer found their mini-split quote the most honest of three and the only one to flag a rebate they qualified for.

What to do before booking: get the quote in writing with the trip and zone charges spelled out, compare it against one other bid, and confirm parts lead times and who will chase them. Several reviewers suggest confirming scope directly with the crew in your home rather than through the office. Google shows 4.7 stars from 318 ratings, the Better Business Bureau grades the business A+, and its Massachusetts HVAC licence is registry-verified active.

**Strengths:**
- Named technicians — reviewers praise individual techs by name across years
- Careful site work — boot covers, protected floors, cleaned-up work areas
- Complex installs — multi-zone duct, air handler, furnace and heat pump projects
- Crisis turnaround — unsafe hot water tank replaced within two days
- Mass Save paperwork — the company handles rebate applications for customers
- Clear explanations — techs walk homeowners through the fault and the fix

**Concerns:**
- Office communication — repeated reports of hard scheduling and unreturned calls
- Parts lead times — one 2026 customer waited a month, most of summer without AC
- Pricing and quotes — hourly rate, zone trip charge and one 40%-higher bid queried
- Office-to-crew handoff — reviewers report installers given wrong information
- Recent severe complaints — several one-star accounts posted during 2026

**Where sources disagree:**
- Google's 4.7-star headline from 318 ratings sits above a written record that contains repeated, specific complaints about office communication, follow-up and pricing running from 2023 through 2026 — the average alone does not show that pattern.
- Reviewers disagree sharply on price: one 2023 customer itemised what they called outrageous rates and a 2024 customer got a quote 40% above a competing bid for identical scope, while a 2023 mini-split customer called their quote the most accurate and honest of three and the only one to flag an available rebate.
- An August 2026 reviewer states the business is 'not a local company with owners and managers on site', which contradicts the company's own account of being a Sandwich business founded and run locally since 2010.
- Licence numbers do not line up across sources: the company's own website advertises 'Master Plumber License:#15101', but that number appears on BuildZoom as an INACTIVE City of Newton 'Heater Contractor' licence, with #4710 listed there as the plumbing business licence; only the Massachusetts HVAC licence 924-SM-B is registry-verified active here, so the website's plumbing licence claim should be treated as unverified.

## Claims & citations

Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication.

- Massachusetts HVAC licence 924-SM-B is registry-verified active, with High Efficiency LLC as the registry holder of record. _(confidence: high)_
  - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA hvac license 924-SM-B registry-verified active — registry holder of record: High Efficiency LLC”
- Google publishes a 4.7-star average from 318 ratings and the Better Business Bureau grades the business A+, listing it under plumber, heating, air conditioning and plumbing projects. _(confidence: high)_
  - [Google](https://www.google.com/maps/search/?api=1&query=High%20Efficiency&query_place_id=ChIJ_bNAoYXL5IkR3LeBSzov-qU) — “Google: 4.7★ from 318 ratings”
  - [Better Business Bureau](https://www.bbb.org/us/ma/sandwich/profile/plumber/high-efficiency-llc-0021-431079) — “Better Business Bureau grade: A+”
  - [Better Business Bureau](https://www.bbb.org/us/ma/sandwich/profile/plumber/high-efficiency-llc-0021-431079) — “Services offered (Better Business Bureau): Plumber, Heating, Air conditioning, Plumbing projects”
- Technicians are named individually and repeatedly praised for careful, well-explained work — a January 2026 reviewer described a two-man crew arriving with boot covers to keep salt and sand off the carpet, and a December 2025 reviewer described a heat supply installed through a very narrow cathedral ceiling space. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2tSQ1VrRm9jell5UTFoZldsSkxMVmM1YlVGSlFtYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOkRCUkFoczYyQ1hfWlJLLVc5bUFJQmc%7C%7C?hl=en) — “4★ The two man work crew arrived on time with boot coverups to keep salt and sand out of my carpet.
One man worked inside cleaning the mini …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xrNVYySlNUMHgwUWtOQlpXMTNlRGxDYm5Fd1lXYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlk5V2JST0x0QkNBZW13eDlCbnEwYWc%7C%7C?hl=en) — “5★ Outstanding Heat Pump Work by Joshua (High Efficiency)

Joshua from High Efficiency did an exceptional job on our heat pump installation.…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT201MGNrNHlYMGRaWDJwdWRIRmtUblF5Um1sTmJGRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOm50ck4yX0dZX2pudHFkTnQyRmlNbFE%7C%7C?hl=en) — “5★ I recently had Patrick and his assistant, Aaron, from High Efficiency service my air conditioning unit to diagnose a cooling problem, and…”
- A reviewer who says they worked in the HVAC business for over 30 years described an extensive renovation — reconfigured multi-zone ductwork, a new air handler, gas furnace, heat pump and mini-split — as top-notch work done right rather than quickly, in a July 2025 review. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25SeFJXRmlZbWxwVm5wVk0xUnphVnBqTW5JeGRsRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOnRxRWFiYmlpVnpVM1RzaVpjMnIxdlE%7C%7C?hl=en) — “5★ If google would allow it, this would be a 10-star review!  I worked in the HVAC business for over 30 years, so I know how to recognize a …”
- Urgent work moves fast: in a March 2026 review a homeowner who called late on a Monday about an unsafe old hot water tank had a new code-compliant system and hot water by Wednesday afternoon, and another March 2026 reviewer described a system condemned during a service call with sales sent out the same visit and the installation expedited. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xoSWFGWk1kelZ5YXpkbmNqRXdUbEl4TlhBeGFWRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlhIaFZMdzVyazdncjEwTlIxNXAxaVE%7C%7C?hl=en) — “5★ We called High Efficiency late Monday afternoon and they had a tech at our home before noontime the next day to inspect our archaic hot w…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21aWWJHNWZSa04wWXpBM2IwMW1VRUZmVlZGWVVuYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOmZYbG5fRkN0YzA3b01mUEFfVVFYUnc%7C%7C?hl=en) — “5★ Our existing system was condemned on a service call, the techs called sales, and Dicky came out immediately while they were still there. …”
- Mini-split and heat pump design and installation is core work — a February 2023 reviewer described a designed mini-split system installed over a five-day managed project, and a January 2026 reviewer described mini-splits fitted in difficult spaces with floors and furniture protected. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2toWGFuaG5XamhYT1Y4eFkwc3lhM3A0Vm1ock9XYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOkhXanhnWjhXOV8xY0sya3p4VmhrOWc%7C%7C?hl=en) — “5★ Excellent! Some of our mini splits are in difficult spaces, but they handled everything well. They were thorough, took care to protect ou…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xrNVYySlNUMHgwUWtOQlpXMTNlRGxDYm5Fd1lXYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlk5V2JST0x0QkNBZW13eDlCbnEwYWc%7C%7C?hl=en) — “5★ Outstanding Heat Pump Work by Joshua (High Efficiency)

Joshua from High Efficiency did an exceptional job on our heat pump installation.…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUNoMDhHRHVRRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CIHM0ogKEICAgICh08GDuQE%7C%7C?hl=en) — “5★ We hired High Efficiency to design and install a mini split system for our home. The team was professional, courteous, and friendly, from…”
- Boilers, furnaces and oil burners are routine work, alongside annual maintenance contracts — an April 2026 reviewer described an oil burner fault diagnosed and explained, and a March 2026 reviewer had a boiler fixed and cleaned on a same-day visit. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21sS2NsaDJaRzFJUlU1NGNVUndZV1YwWkdOb2NXYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOmlKclh2ZG1IRU54cURwYWV0ZGNocWc%7C%7C?hl=en) — “5★ I hired High Efficiency to do annual maintenance check on my furnace and AC system.  They had installed the system 4 years ago. Techs wer…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2twV1prNWlOVzVqTUZSSVFtVmxlRWRCTWtZM2FYYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOkpWZk5iNW5jMFRIQmVleEdBMkY3aXc%7C%7C?hl=en) — “5★ Patrick and Sebastian were able to fix problem with oil burner quickly and explained clearly what had caused the problem.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21GNFdsaGhkMnh2V0RZdFJYbERjVTlJZFhseVVIYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOmF4Wlhhd2xvWDYtRXlDcU9IdXlyUHc%7C%7C?hl=en) — “5★ Great experience with High Efficiency. They were very responsive, came out the same day, and fixed and cleaned my boiler. Excellent servi…”
- Plumbing and gas work as well as HVAC: a July 2026 reviewer described work after National Grid swapped the meter and shut off the gas following a leak, and a March 2026 reviewer had an archaic hot water tank replaced. _(confidence: high)_
  - [Better Business Bureau](https://www.bbb.org/us/ma/sandwich/profile/plumber/high-efficiency-llc-0021-431079) — “Services offered (Better Business Bureau): Plumber, Heating, Air conditioning, Plumbing projects”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xoSmIxUlVaa3AzWmtGT1kyTlJVelZPTVY5TGNsRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlhJb1RUZkp3ZkFOY2NRUzVOMV9LclE%7C%7C?hl=en) — “5★ National Grid came to the house, swapped the meter and turned off the gas after a leak was discovered. It was summertime and on the cusp …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xoSWFGWk1kelZ5YXpkbmNqRXdUbEl4TlhBeGFWRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlhIaFZMdzVyazdncjEwTlIxNXAxaVE%7C%7C?hl=en) — “5★ We called High Efficiency late Monday afternoon and they had a tech at our home before noontime the next day to inspect our archaic hot w…”
- The company handles Mass Save rebate paperwork for customers, which several reviewers single out. _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25SeFJXRmlZbWxwVm5wVk0xUnphVnBqTW5JeGRsRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOnRxRWFiYmlpVnpVM1RzaVpjMnIxdlE%7C%7C?hl=en) — “5★ If google would allow it, this would be a 10-star review!  I worked in the HVAC business for over 30 years, so I know how to recognize a …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnTUNneWNhVGd3RRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CIHM0ogKEICAgMCgycaTgwE%7C%7C?hl=en) — “5★ From the first home visit and estimate (for a brand new Heat Pump/AC system) to installation and follow up, High Efficiency LLC Heating P…”
- Office scheduling and communication is the most repeated complaint: an August 2026 reviewer found making the appointment complicated and frustrating and felt staff were not communicating with each other, and a June 2026 reviewer waited through a booked 12-2 window with no technician and no call before being told they would need to reschedule. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2psbFJYQXdXRmd4WlZCZmRHaHVURGt6Vm1JME1XYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOjllRXAwWFgxZVBfdGhuTDkzVmI0MWc%7C%7C?hl=en) — “4★ Making the appointment was complicated and frustrating. Felt like the staff was not communicating with each other.
The actual service was…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xwYVZTMTVlV2hvYVhkVFYyZGZTMTlOUzJjNVRGRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlpaVS15eWhoaXdTV2dfS19NS2c5TFE%7C%7C?hl=en) — “4★ Yesterday’s furnace check up was superb. Tech arrived within time window, was courteous and efficient. I gave only four stars because thi…”
- An August 2026 reviewer said a part took a full month to order, leaving them most of the summer without working AC, with repeated follow-up calls receiving minimal acknowledgement. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xSeVVIVnhjRE14YUhoS1NuZFRjMlZXTlhCc1dFRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlRyUHVxcDMxaHhKSndTc2VWNXBsWEE%7C%7C?hl=en) — “1★ Took a full month for a part to be ordered to complete our repair. Spent most of the summer without working AC in our home. Called multip…”
- Pricing complaints recur: a 2023 reviewer itemised $250 per hour plus a $50 zone charge for a two-mile trip and $575 for a twenty-minute on-call visit, and a 2024 reviewer said a boiler replacement quote came in 40% higher than another for identical scope and equipment. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNQMU5EQkFREAE!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CIHM0ogKEICAgICP1NDBAQ%7C%7C?hl=en) — “2★ Not sure what to make of this company. While we were happy with their installation of mini-splits a couple of years ago, we just received…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURwc2RHRndRRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CIHM0ogKEICAgIDpsdGFwQE%7C%7C?hl=en) — “1★ Their rates are outrageous. $250 per hour plus an extra "Zone" charge just for showing up depending on distance to the site (for 2 miles …”
- A May 2026 reviewer alleged overpricing, work attempted without inspection, poor quality work, aggressive phone staff and damage caused to their house; a July 2026 reviewer said no one knows what is going on and the company just tries to sell you something; and an August 2026 reviewer said that after a $20,000 heating and hot water system they were treated very badly. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2pOTk9FNVZNR05qYlU5Wlgyd3dRbU5NWjJGa09XYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOjNNOE5VMGNjbU9ZX2wwQmNMZ2FkOWc%7C%7C?hl=en) — “1★ After spending $20,000 on a new heating and hot water system, I have been treated very badly by this company. They are not a local compan…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xaVFVGbG5TbkZMVVhCMU5UTjJibUZzVVUxS1dIYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlZTUFlnSnFLUXB1NTN2bmFsUU1KWHc%7C%7C?hl=en) — “1★ Very, very poor service-  their name does not fit.   No one knows what is going on and just tries to sell you something.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2tFeVUxUldhV1p4TlVneE5VNXhaMUpSTkdkQ1QxRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOkEyU1RWaWZxNUgxNU5xZ1JRNGdCT1E%7C%7C?hl=en) — “1★ Over priced. Tried to do work without inspection. Poor quality work. Mean, aggressive and unfriendly people in their phone staff. Caused …”
- A 2023 reviewer reported that a gas line the company installed for a fireplace insert leaked, and that a quote request went unanswered until after the review was posted. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUN4b3JIU1J3EAE!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CIHM0ogKEICAgICxorHSRw%7C%7C?hl=en) — “3★ Still waiting for a return call from my last request for a quote.  The gas line they installed for my fireplace insert leaked.

As a foll…”
- One reviewer said work quality was high but the office told the installers wrong information multiple times, causing delays and confusion, and advised verifying all work and materials directly with the crew in your home. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2psbFJYQXdXRmd4WlZCZmRHaHVURGt6Vm1JME1XYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOjllRXAwWFgxZVBfdGhuTDkzVmI0MWc%7C%7C?hl=en) — “4★ Making the appointment was complicated and frustrating. Felt like the staff was not communicating with each other.
The actual service was…”
- A Nextdoor neighbour in Centerville recommended High Efficiency in April 2026 when asked for emergency HVAC help in West Yarmouth, noting they also do an annual cleaning. _(confidence: medium)_
  - [Nextdoor](https://nextdoor.com/p/qDFR3bmCC3D8) — “Nextdoor (Centerville, MA) — High Efficiency in Sandwich. They do a annual cleaning also”
- The rating balances a deep, active and mostly positive record (4.7 stars from 318 Google ratings, 215 reviews on file since 2021) and consistently strong technician praise against a coherent, repeated complaint pattern about office communication, follow-up and pricing that spans 2023 to 2026, including several severe one-star accounts in 2026. _(confidence: high)_
  - [Google](https://www.google.com/maps/search/?api=1&query=High%20Efficiency&query_place_id=ChIJ_bNAoYXL5IkR3LeBSzov-qU) — “Google: 4.7★ from 318 ratings”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xSeVVIVnhjRE14YUhoS1NuZFRjMlZXTlhCc1dFRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlRyUHVxcDMxaHhKSndTc2VWNXBsWEE%7C%7C?hl=en) — “1★ Took a full month for a part to be ordered to complete our repair. Spent most of the summer without working AC in our home. Called multip…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2tFeVUxUldhV1p4TlVneE5VNXhaMUpSTkdkQ1QxRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOkEyU1RWaWZxNUgxNU5xZ1JRNGdCT1E%7C%7C?hl=en) — “1★ Over priced. Tried to do work without inspection. Poor quality work. Mean, aggressive and unfriendly people in their phone staff. Caused …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURwc2RHRndRRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CIHM0ogKEICAgIDpsdGFwQE%7C%7C?hl=en) — “1★ Their rates are outrageous. $250 per hour plus an extra "Zone" charge just for showing up depending on distance to the site (for 2 miles …”
- Specializes in HVAC / Heating & Cooling _(confidence: high)_
  - [Better Business Bureau](https://www.bbb.org/us/ma/sandwich/profile/plumber/high-efficiency-llc-0021-431079) — “Services offered (Better Business Bureau): Plumber, Heating, Air conditioning, Plumbing projects”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21sS2NsaDJaRzFJUlU1NGNVUndZV1YwWkdOb2NXYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOmlKclh2ZG1IRU54cURwYWV0ZGNocWc%7C%7C?hl=en) — “5★ I hired High Efficiency to do annual maintenance check on my furnace and AC system.  They had installed the system 4 years ago. Techs wer…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2toWGFuaG5XamhYT1Y4eFkwc3lhM3A0Vm1ock9XYxAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOkhXanhnWjhXOV8xY0sya3p4VmhrOWc%7C%7C?hl=en) — “5★ Excellent! Some of our mini splits are in difficult spaces, but they handled everything well. They were thorough, took care to protect ou…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25SeFJXRmlZbWxwVm5wVk0xUnphVnBqTW5JeGRsRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOnRxRWFiYmlpVnpVM1RzaVpjMnIxdlE%7C%7C?hl=en) — “5★ If google would allow it, this would be a 10-star review!  I worked in the HVAC business for over 30 years, so I know how to recognize a …”
  - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA hvac license 924-SM-B registry-verified active — registry holder of record: High Efficiency LLC”
- Specializes in Plumbing _(confidence: high)_
  - [Better Business Bureau](https://www.bbb.org/us/ma/sandwich/profile/plumber/high-efficiency-llc-0021-431079) — “Services offered (Better Business Bureau): Plumber, Heating, Air conditioning, Plumbing projects”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xoSmIxUlVaa3AzWmtGT1kyTlJVelZPTVY5TGNsRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlhJb1RUZkp3ZkFOY2NRUzVOMV9LclE%7C%7C?hl=en) — “5★ National Grid came to the house, swapped the meter and turned off the gas after a leak was discovered. It was summertime and on the cusp …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xoSWFGWk1kelZ5YXpkbmNqRXdUbEl4TlhBeGFWRRAB!2m1!1s0x0:0xa5fa2f3a4b81b7dc!3m1!1s2@1:CAIQACodChtycF9oOlhIaFZMdzVyazdncjEwTlIxNXAxaVE%7C%7C?hl=en) — “5★ We called High Efficiency late Monday afternoon and they had a tech at our home before noontime the next day to inspect our archaic hot w…”

## License

Status: **active** (#924-SM-B, hvac) — verified against the official MA state registry on 2026-08-20, never self-reported.
Re-check at the official registry: https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page

## Sources

- [Google](https://www.google.com/maps/search/?api=1&query=High%20Efficiency&query_place_id=ChIJ_bNAoYXL5IkR3LeBSzov-qU): 4.7★ from 318 ratings
- [Google Reviews](https://www.google.com/maps/search/?api=1&query=High%20Efficiency&query_place_id=ChIJ_bNAoYXL5IkR3LeBSzov-qU): Listed on this source
- [Better Business Bureau](https://www.bbb.org/us/ma/sandwich/profile/plumber/high-efficiency-llc-0021-431079): Listed on this source
- [Yelp](https://www.yelp.com/biz/high-efficiency-sandwich-2): Listed on this source
- [Official Website](http://high-efficiencyllc.com): Self-reported profile and service details
- [Exa](https://reviews.birdeye.com/high-efficiency-167046639643231): 0 web mentions across the open web (each linked to its source)
- [BuildZoom](https://www.buildzoom.com/contractor/high-efficiency-llc): Listed on this source

## Mentions

Unverified third-party mentions found on the open web — relay with attribution ("a Reddit commenter said…"), never as Tavlee's own finding.

- “High Efficiency in Sandwich. They do a annual cleaning also” — nextdoor.com (2026-04-03) — https://nextdoor.com/p/qDFR3bmCC3D8

## Recent reviews

- **1/5 · Google Reviews · K L · 2026-08-18**: Took a full month for a part to be ordered to complete our repair. Spent most of the summer without working AC in our home. Called multiple times to follow up with minimal acknowledgement.
- **1/5 · Google Reviews · Andrea Glass · 2026-08-14**: After spending $20,000 on a new heating and hot water system, I have been treated very badly by this company. They are not a local company with owners and managers on site. I spent $1000 with this company who said they could fix my gas fireplace. After 3 attempts and many parts they have decided the…
- **4/5 · Google Reviews · L Mazes · 2026-08-05**: Making the appointment was complicated and frustrating. Felt like the staff was not communicating with each other.
The actual service was excellent. Efficient, clean, and well-done. Everything was clearly explained. Such a huge difference from first impressions made by office staff.
- **1/5 · Google Reviews · Linda Gadkowski · 2026-07-29**: Very, very poor service-  their name does not fit.   No one knows what is going on and just tries to sell you something.
- **5/5 · Google Reviews · ace_kidz 11 · 2026-07-25**: Feel very lucky to have found High Efficiency after being burned by another contractor. My business was in need of A/C urgently and not only were they prompt, but I was able to get much better equipment and paid almost half the price of other quotes, due to their  knowledge of rebates. I was skeptic…
- **5/5 · Google Reviews · jen govoni · 2026-07-25**: Both techs were very friendly and did a great job.  Very happy with High Efficiency!
- **5/5 · Google Reviews · Scott Carl · 2026-07-25**: I hired High Efficiency to do annual maintenance check on my furnace and AC system.  They had installed the system 4 years ago. Techs were prompt, polite and thorough. I will definitely use High Efficiency for service again.
- **5/5 · Google Reviews · Marcia Binninger · 2026-07-11**: They were amazing, quick and professional.
- **5/5 · Google Reviews · Paul & Gloria Dahl · 2026-07-09**: Eric did a great job and answered all questions
- **5/5 · Google Reviews · Shawn Meyers · 2026-07-03**: Prompt response and resolution of issue.

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Data freshness: last scanned 2026-08-20T05:54:04.035Z.
Cite as: High Efficiency — Tavlee (https://tavlee.com/contractor/high-efficiency-sandwich)
Source: https://tavlee.com/contractor/high-efficiency-sandwich