17 photos
MDZ HVAC
Local business · Chelsea, MALocal business · 25A Williams St, Chelsea, MA 02150, USA
3.5(6)· early read
Verified record
License not state-verified. We could not confirm a current registration in the state registry. Insurance is self-reported. Look up in the official Massachusetts registry ↗
- 6 reviews in the last 6 monthsNo negatives
- 17 work photos
Highlights
- Mini-split tune-ups — thorough cleaning, plus a prior installer's leak fixed
- Same-day service — arranged for an AC caller in July 2026
- Family operation — father, son, and wife handling scheduling
MDZ HVAC is a Chelsea outfit whose entire written record fits inside a single month — six Google reviews, all five stars, all posted in July 2026. What the detailed ones describe is mini-split work. One customer had a tune-up and deep cleaning done and said Joan turned up on time, was thorough about it, and fixed a water leak left behind by whoever installed the unit originally. Another posted on Facebook looking for help with an AC unit; MDZ reached out and had someone there the same day — Mr Bello and his son, with his wife handling the scheduling. Two of the six reviews are written in Spanish. One month of five-star reviews is not much to judge anyone on, however well the individual accounts read. If you call, treat the price and the scope as things to pin down in writing rather than assume.
Read the comments
Most recent comments
- 5.0Jul 30, 2026
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.
— Edwin MiguelView on Google Reviews ↗ - 5.0Jul 28, 2026
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
— Ginny S.View on Google Reviews ↗ - 5.0Jul 24, 2026
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!!!!!!!!
— Brett SilvaView on Google Reviews ↗ - 5.0Jul 8, 2026
Muy complacido con el trabajo de MDZ, profesional, capacitado, atento a los detalles, extremadamente complacido y sin dudas lo recomiendo
— Luis PadillaView on Google Reviews ↗ - 5.0Jul 4, 2026
Great service. Joan was great.
— Oscar RamosView on Google Reviews ↗
What does heating and cooling work cost in Greater Boston?
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
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