Efficiency Plumbing, Heating & Air

Efficiency Plumbing, Heating & Air, based in Hanover, is a South Shore company that gets called for everything from a broken heat pump to a clogged kitchen sink — reviewers keep singling out speed: same-day appointments during a heatwave, technicians who show up first thing in the morning, an AC condenser diagnosed and repaired within 20 minutes of arrival. Google shows 4.9★ from 142 ratings. The written record runs deep — 109 reviews from 2022 through 2026 across four sources, with 15 landing in just the last six months and none of them negative. One customer described a 10-year relationship covering both a home and a car dealership; another said the company handles routine service across more than 30 rental properties plus a Boston office. The jobs described range from routine to substantial. Recurring names — Mike, Carlos, Carlo, Michael — show up across dozens of reviews for fast AC and furnace diagnostics, including an overnight AC failure that was running again by 10:30 the next morning. On the bigger end, in a 2023 review a homeowner described a full 3-zone heat pump, tankless water heater and whole-house water filtration install done through the state's Mass Save program, which came with a $10,000 rebate and 0% financing. Plumbing work shows up too — drain clearing, a kitchen faucet swap, gas boiler service, and water heater repairs. Two things are worth knowing before calling. The state's plumbing license registry lists the company's license, held under a related name (High Efficiency Plumbing & Heating Inc), as expired rather than active. And a couple of reviews flagged real gaps: a tune-up special that didn't include cleaning the outdoor AC condenser, and a plumber who worked thoroughly on a leak but never located its source. Still, the volume and consistency of detailed, specific praise — especially on HVAC and heat-pump installs — make this a company South Shore homeowners keep calling back; worth confirming current plumbing licensing status directly before booking plumbing work specifically.