Verified record
Typical Greater Boston range for this kind of work, from regional averages — not a quote from ALDO'S HVAC LLC. 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
Aldo's HVAC is a Medford company the Vieira family has run since Aldo Vieira, a refrigeration mechanic who moved from Brazil, founded it in 1996; his son and Eliane Vieira later joined the business. Its Massachusetts HVAC license is verified active, and it carries a BBB A+ rating. The company's specialty, borne out across dozens of reviews, is heat pumps — installing them in century-old houses with no existing ductwork, retrofitting them alongside oil or gas systems, and helping customers navigate Mass Save rebates. The bulk of the written record, spanning 2021 through early 2026, describes detailed, technically demanding heat pump and ductwork jobs done well: a four-level, 10,000-square-foot church HVAC system, a 2-zone heat pump built from scratch in a 120-year-old house with no ductwork, and a 2023 customer who called Al 'far and away the most knowledgeable' of five contractors consulted. One customer, working with Al and his team for eight years, described consistently excellent workmanship across many completed projects. Another said Aldo's diagnosed and fixed a problem for a fraction of a $40,000 quote a different company had given for a full system replacement. Set against that is a real pattern of complaints, concentrated more recently. A 2024 review described a botched installation of five air handlers and three compressors in a new addition, with damaged ceilings and ductwork that had to be redone twice and still came out wrong. A 2025 review said a diagnostic visit for an A/C balancing issue was superficial — the technician didn't locate the dampers behind the walls and found nothing wrong. Another 2024 review described a dispute over whether return-duct work was included in a renovation quote. And two 2021 reviews described the company failing to return calls or show up for scheduled appointments. For a heat pump installation, especially a complex retrofit into an old house, Aldo's has an unusually deep and specific track record of success. But the more recent complaints about a major install and a diagnostic visit are serious enough to ask pointed questions about — get a detailed, itemized scope in writing, and confirm who will be supervising the job before signing.
“Seems more comfortable with ductwork!”
“I used Aldo's in Medford to install my Heat pump last year.”
“|Aldo's HVAC|5|21k|”
I had a great experience with Aldo HVAC installing a heat pump in my office. The team was extremely professional, honest, and knowledgeable from start to finish. They arrived on time, communicated clearly throughout the process, and completed the job exactly as promised. The installation was smooth and well organized, and it’s clear they take pride in their work. I would highly recommend Aldo HVAC to anyone looking for reliable and trustworthy HVAC service.
I scheduled a technician visit with Aldo's to diagnose an A/C balancing issue in a new home. (They did not install the system.) The visit was a sham: the technician looked at the A/C unit, didn't see the dampers, and because the ducts were behind the walls, said there was nothing he could do. He communicated this "walls, nothing I can do" using Google Translate on his phone, from (Brazilian) Portuguese to English, because he did not speak any English, not even those words. So he did nothing useful and told me nothing I did not already know. (He was also wrong, it turned out: this kind of residential system, as is apparently common, did not have internal dampers, only vent flaps.) I am refusing to pay the $195 invoice for this waste of everyone's time. (Edit: in response to my feedback, Aldo's offered me a "complimentary preventive maintenance visit," which I declined.)
Aldo's has installed and been maintaining my HVAC system for several years now. They are a great company, very professional and experts at what they do. Very responsive and reliable.
Trustworthy company. Iones came to give me a second opinion on an issue with my HVAC unit. From another large plumbing company, I was quoted a $40k fix to replace the entire system. He came and troubleshot, got into a dusty crawl space, followed the tubing, and found the issue--a kinked plastic tube. NOT THE ENTIRE UNIT. In times when there is price gauging and misinformation, find the people you trust and stay there. Aldo's HVAC has a customer for life.
I have known and worked with Al and his team from Aldo's HVAC for 8 years. I have seen many of their completed projects and have dealt directly with Al, his management team and their technicians. Their quality of workmanship is excellent. They are professional, courteous, attentive, transparent and take great pride in their work. Al Viera the owner is one the most technically knowledgeable guys in the business. Great with high efficiency Heat Pump systems, Mini-splits and conventional heating and cooling systems. They complete their work on time, neatly, professionally and will exceed your expectations. I recently had 3 separate ECOER SDi Heat Pumps and matching ECOER Air Handler systems installed at my house through Al's recommendation and guidance. They are working great! I would strongly recommend Aldo's HVAC for any and all of your HVAC needs.
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Certified attributes are verified against the public registry. Others are the business's own statement.
1 change recorded — last scanned Jul 2, 2026.
Honest pricing5.0
No hard sell4.8
Whole-house gut renovations4.4
Same-day water heater swap under other quotes4.0
28 years in business2.2
Registry-verified HVAC licenseNot yet rated