Verified record
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Chronos - Electrical, HVAC and Plumbing. Use it to sanity-check bids, then get the real number in writing.
Standard receptacle swaps — a new dedicated circuit is a bigger job ($350–$750).
Flush mounts, pendants, chandeliers — hung on existing boxes.
Estimated range
$530 – $1,100
Typical electrical project around $820
Chronos - Electrical, HVAC and Plumbing is a Worcester-area service business offering electrical, plumbing, heating and air-conditioning work. Its Thumbtack profile says the company has six employees, six years in business, and a 64-project portfolio; Mario Junior Coelho Santos is named in the background-check credential. The five written reviews on file are all from June or July 2026 and all are five stars. Customers describe capacitor replacement that restored cooling, routine HVAC checking with maintenance advice, replacement of a central air unit, and a larger installation that expanded from two to three systems. They repeatedly mention prompt replies, on-time arrival, clear explanations, accommodating scheduling, professional work, and cleanup. One homeowner said Chronos offered several options and kept the three-system project within budget; another said the crew continued despite poor weather and finished the new-unit installation. The public written history is recent and comes from one platform, so it is a short track record even though Thumbtack displays 73 total ratings. The profile's service menu is broad, covering electrical and wiring repair, lighting, panels, thermostats, fans, plumbing pipes, water heaters, heating systems, and central-air installation, repair and maintenance. The reviews themselves chiefly document HVAC work rather than the full electrical and plumbing menu. Chronos looks most directly suited to central-air diagnosis, maintenance and replacement, with additional HVAC, plumbing and electrical capacity listed on its profile. Before a larger installation, ask for the written options and estimate, confirm who will perform any electrical or plumbing portion, and verify current licensing and insurance for the work being contracted.
I originally needed to replace two central AC systems—one was no longer functioning, and the other was not cooling properly and still used the older R-22 refrigerant. Chronos responded almost immediately, provided several estimates, accommodated my availability, arrived on time, communicated by text, installed three systems efficiently, addressed additional issues appropriately, removed old equipment and materials, and left the work areas clean and orderly. I am extremely pleased with the installation, communication, and overall quality of their work. I would confidently recommend Chronos AC & Plumbing to anyone needing HVAC services.
Mario and his crew did an amazing job putting our new unit in..the weather didn't cooperate but they pushed through and finished the job. Excellent product and professional. Also great price!!
Excellent service! They quickly diagnosed the issue, replaced the capacitor, and got my AC cooling again. Professional, honest, and highly recommend!
Mario came on time and fixed my AC problem. He was very professional and patient in explaining to me my AC problem and his recommendation. After repair, he makes sure everything is working well and the area is clean before he left. I will definitely use him again.
Mario was not only professional when checking HVAC system, he was kind enough to answer my questions regarding the systems maintenance and provided corective feedbck and recommendations. I would definitely hire them again. Thank You
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1 change recorded — last scanned Aug 24, 2026.
