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MDZ HVAC is a Chelsea shop with a short record so far — six Google reviews, all from mid-2026. The specifics that come through: a mini-split tune-up and deep cleaning where Joan, on time and communicative, also fixed a water leak left over from a previous installation, and a same-day AC repair arranged after a customer posted on Facebook, handled by Mr. Bello and his son. There isn't much of a track record yet beyond these few jobs, and several of the reviews are short on detail — worth keeping in mind given how new the review history is.
It’s a great guy and so friendly, professional and just gives me a good advice. I really appreciate and recommend his job Thanks Joan for the great job u did at my place. Is anyone want a grate price and service call this guy.
I recently hired mdz hvac for mini split tune up and deep cleaning, and I highly recommend their services. Joan was on time and super communicative. He is very thorough in his work and made sure everything is done correctly. One of my splits had a water leak from previous installation and he also fixed it for me. 100% would hire again! Will be using them for any hvac services
I shared on Facebook I needed someone to help me with my AC unit. MDZ on there on reached out to me. They were on it they set me up with same day service.. Mr Bello and his son come to my home and went above and beyond to help fix my situation. I could not say enough nice things about this company. They made the process so easy for me and took there time making sure it was right. If you are looking for Honest, Reliable, Dedicated hard working men. Then this is the place for you. Also his wife handles making the whole thing go even smoother. I am so so happy I found them he is my new H-Vac company 10 out of 10!!!!!!!!
Muy complacido con el trabajo de MDZ, profesional, capacitado, atento a los detalles, extremadamente complacido y sin dudas lo recomiendo
Great service. Joan was great.
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1 change recorded — last scanned Aug 2, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from MDZ 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
Solves what others missed5.0
14 permitted HVAC projects on record3.6
Same-day burst pipe repair3.6
