Verified record
Sentinel Heating & Cooling is an HVAC business where a customer worked with Keith, who arrived on time and explained what was going on with their system. That customer says Keith gave options that made sense for their budget instead of pushing unnecessary repairs or upgrades, left everything clean, and showed them how to maintain the system going forward. Another customer whose AC unit went down says they called 17 companies that could not come until the following week or later, and Keith came that evening and took care of the problem. A different customer says they had a few jobs done by Sentinel HVAC and plans to come back for more services.
Our AC unit went down at the worst time possible. I called 17 different companies, and not a single one of them could come until the following week or later. Keith came that evening. Took care of the problem efficiently, quickly, and directly. We will definitely use him going forward with any Hvac needs. Thank you, Keith!
Thorough and professional great service!
Throughout the years of looking for services from different companies, this company surpassed my expectations. Had a few jobs done by Sentinel HVAC and service is the best I've had, level of professionalism, knowledge of the field, worth ethic and overall the work that's done itself is phenomenal is unremarkable. Will be coming back for more services as long as I can. Thank you so much Sentinel Hvac!
I recently had the pleasure of working with Keith from Sentinel, and I couldn’t be more impressed with the experience from start to finish. From the moment I called, their customer service was friendly, responsive, and genuinely focused on helping me find the best solution for my home. Keith arrived right on time, was extremely professional, and took the time to clearly explain what was going on with my system. Instead of pushing unnecessary repairs or upgrades, he was honest, transparent, and gave me options that made sense for my budget. It’s rare to find that level of integrity these days. The work itself was done efficiently and with great attention to detail. Everything was left clean and in perfect working order, and my system is now running better than it has in years. You can tell he takes pride in his work. What really stood out to me was the combination of expertise and customer care. He didn’t just fix the issue—he made sure I understood how to maintain my system moving forward, which I really appreciated. I would absolutely recommend this company to anyone in need of HVAC services. Reliable, knowledgeable, and trustworthy—exactly what you want when inviting someone into your home.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Sentinel Heating & Cooling (HVAC). Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
Specializes in
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2 changes recorded — last scanned Sep 30, 2026.
Transparent diagnostics5.0
Broad plumbing and HVAC range5.0
Repeat, years-long customers5.0
Water heater and boiler installs5.0
Two AC technicians out within a few hours5.0