Each time we've used them they have done a fantastic job. I highly recommend using them for duct…read morecleaning.

Great service and great work. He listened to all my concernsand questions. The price was great.read more

Since my first review I've used GHM for multiple things. Most recently they fixed the pump…read moreunderneath my house - first with a temporary fix while they waited for a part and then with the permanent fix. He was patient with me as I explained my issue over the phone and was able to inform me that our washer could still be used even before they got to fixing that. They've done a couple of other jobs for us in between like putting in a new shower head and implementing a new outdoor water spigot since the old one just didn't turn on anymore. They are always good and fair with their pricing and as always are happy to entertain my questions (like me asking where our water shutoff valve is and them showing me where it was.)

Top notch professional. Very friendly, very knowledgeable. Excellent work ethic. Highly recommendread more

Extremely happy with the services provided by James. He installed a 6 unit/2 compressor heat pump…read moresystem in our 150+ year old house in about two days, demonstrating superior knowledge of the system and suggesting actually aesthetically pleasing choices for ducting etc. that many other contractors ignored. Price was reasonable for the scope and system specs, and James was extremely responsive and patient throughout the whole process. We also really appreciate James's help coordinating with MassSave (including some truly terrible inspections), ultimately enabling us to claim our full rebate. I'd highly recommend working with James, and we will continue to reach out to him for all our HVAC needs!

After a 3-yr search and MANY bids for a new HVAC, we settled on James Wu, who installed our system…read morelast month and proved the research paid off. Below are things I wanted to know before choosing a contractor; maybe it will be helpful for you. Our situation: 100+ yr old home with current boiler in basement. We recently insulated our walk-up attic - that would both freeze and melt items stored there - with closed-cell spray foam (more research there), added drywall and will use it for storage. This is where the air handler and ERV (for ventilation) went. Our upstairs is now ducted, with one vent running through a closet on the 2nd floor to 1st floor. We also added a Mitsibishi floor mount unit and a ceiling cassette on 1st floor. So, we had a VARIETY of equipment installed, requiring a contractor experienced in not only ducting, but mini-split installs with both a ceiling cassette and floor mount unit. We did not want the large wall mount mini split units. Our walls/ceilings are PLASTER, (metal wire mesh and cement-based): cutting them is a JOB. And, we wanted the floor mount unit RECESSED. COST - James was in-line with our other bids, which came in between 27k and 39k, largely depending on equipment recommended, with ceiling cassettes costing more. Many contractors simply would not install them, and wanted to run ducts in the corners of all upstairs rooms to first floor, which to us was a last resort. COMMUNICATION - James is very responsive to texts, emails, and even more importantly, he is a fantastic communicator. He is very calm, not pushy, explains things in an easy-to-understand way that clearly shows he knows his business. I actually told my husband after he left for the first time, "I think we may have found our guy" just based on his personality and knowledge. He's likeable, which isn't a requirement, but definitely helps. EXPERTISE - This is what truly sets James apart. Our needs were fairly complex, requiring interior ducting, 2 outside units with exterior line sets, and recessed ceiling units, but also RECESSING the inside floor unit into an interior wall. We've overseen several renovation projects recently and could tell these guys knew what they were doing. Also, they were perfectionists, and paid attention to details you don't often find with contractors. DEPENDABILITY - Not a single missed appt. Showed up on time with clear communication. The job took a week. He also helped with Masssave paperwork. They cleaned up after themselves each day, which we appreciated. KNOWLEDGE - Extremely versed in Mitsibishi equipment. He's a Diamond Contractor, which extends our warranty, but we'd have chosen him regardless. Every question I had about these units (cassette and floor unit operation, air handler, ERV, outdoor units, thermostats...) he knew the answer to. When I researched anything specific online, from multiple and trusted sources, I found the info he'd given me to be correct. I trust his knowledge and I don't automatically do that. One example: our ceiling cassette has an internal thermostat and it's off by several degrees regularly. I researched it and found we likely need an external thermostat separate from the unit to measure the room's temp. I texted James a photo showing the inaccurate reading and his immediate reply, "you need an external thermostat. I'll install one." That's what I'm talking about. INTEGRITY - Example: After the permit inspector left, James explained his philosophy on inspections. Each city apparently has different requirements. He learned several years ago how strict one particular city was, requiring a blower test to determine air tightness and the passing score was 4% or less. He got 4.1% and city wouldn't pass it. This required a lot more time/energy to go through everything and another test and more $$. So, now James says to his guys, "We install to the strictest inspection every time, regardless of the specific city's requirements, so we don't ever have to redo anything." In our case, the city didn't need a blower test but if they did, I feel confident we would have passed! I don't often take time to write reviews, esp this lengthly, but I felt it was warranted here. Finding an HVAC contractor is HARD; it's time-consuming and complicated. And a lot of money. Three years of research finally led us to James and now, looking back, it was worth the wait and headaches in research. I would highly recommend anyone in the market for a new HVAC, especially if it involves Mitsibishi and especially ESPECIALLY if it involves recessing any equipment like ceiling cassettes or wall units, to consider James Wu. He and his team are uniquely skilled in their work.

Jason serviced my 22 year old furnace. He was great and explained everything involving the…read moredifferent parts that would most likely need to be replaced within the next year or so. He also gave an estimate for the parts and for a new unit.

I met Jason, after an AC failure on of the hottest days of Summer. Jason contacted me promptly,…read moreprovided all the details and was upfront about everything including his service fees. He was at my place at promised, and got to work. He explained everything as he motored on and worked the problem. He came fully prepared with every possible part monitor upgrade and suggested only what was required. He was very pleasant to work with and was very easy to talk with. I would definitely recommend using Donovan Mechanical and request for Jason if he is available.

Buying a mini-split system is an incredibly difficult process. The Mass Save rebate system is very…read moredifficult to navigate. I got quotes and presentations from 4 different vendors and the pitch and price was exactly the same - hour long presentation and a $30k cost. However, what each vendor tells you is that IF you qualify a $10k rebate is available and your net cost is $20k. Essentially the rebate is a scam - it just gives contractors the ability to inflate the prices and use the rebate to make the system sound cheaper than it really is. I finally met with McIver and he was able to simplify the entire process. He is not a Mass Save contractor. So he does not work the rebate, just offers a strait-up cost to install the system. When he gave me his quote, I quickly figured out that Dan McIver was an honest man and that the whole Mass Rebate program was a scam. His quote with the similar equipment and the same number of mini-splits was $13,500. I hired him for the job and they started within a week. One of my biggest concerns was esthetics - I was worried about too many refrigeration lines running around the outside of the house. Our house is a rental property in Cape Cod that had a lot of charm to it and we did not want to ruin the integrity of it. Dan came up with a brilliant solution and was able to run most of the lines through the basement to minimize the lines on the outside of the house - we were so pleased with this solution. His team did a fantastic job building out the system - they were clean and finished the project on the timeline he quoted. The work was high quality!! Net is that Dan took a very complicated buying process and made it simple and affordable. He is highly recommended for the quality of his work, pricing and his honest and straightforward approach!

Dan is great. Extremely knowledgeable and quick to diagnose and fix my issues. Saving his number…read morefor future jobs.

OK... Another Friday afternoon... 1500hrs…read more.. New England summer... Let's start with one word: HOT. Like, really hot... Now, add some modifiers to that: scorching, sweltering, and searing. And for good measure, let's add some apropos meteorological catch phrases: hazy, hot, and humid heat wave... By now, you're starting to get a picture. Let's add some more contour, brightness, and shape to the visual... During one of the most oppressive hot spells of 2024, our air conditioning unit died on us, totally passed from nature to eternity. Not pretty... We called around. We got on the world wide web. We scoured social media. We flashed the Bat-signal. We did everything short of sending out morse codes, faxed distress letters, and telegrams via Pony Express. Desperation setting in... Then, we call Cardarelli Plumbing and Heating of Quincy. Joseph answers. He tells us he doesn't do window AC units but knows a handyman named Richard who might be able to help. Joe also says he'll call Rich immediately when we hang up... Thank you, Joe... 1800hrs... Rich calls. He asks pointed questions about what we need and promises to call the following Saturday morning... Rich came by with his teammate Michael and installed our window unit and a few other handyman jobs. Good fortune... Fast forward to Saturday night live. (Lite humor there.) Temps are cool now. I'm kicking back watching the Red Sox comeback vs. the Dodgers of Los Angeles and counting my blessings. Life's good... If you need a handyman from Wareham to Bridgewater to Braintree to Quincy, Massachusetts, call Rich 857-261-8886. Thanks again, Joe of Cardarelli Plumbing and Heating. Appreciate the assist in finding Richard and Michael. Appreciate you... You're the best... In short... It all went very well and I'm very happy with the results. Joseph was a godsend. Rich and Mike were polite, friendly, and timely. You all take your work seriously, and it shows. Lastly, Rich gave me such a fair price and was so accommodating, helpful, and eager to please that I paid him double. And that's that. (Insert happy face here.)

OK... Anothee Friday afternoon... 1500hrs…read more.. New England summer... Let's start with one word: HOT. Like, really hot... Now, add some modifiers to that: scorching, sweltering, and searing. And for good measure, let's add some apropos meteorological catch phrases: hazy, hot, and humid heat wave... By now, you're starting to get a picture. Let's add some more contour, brightness, and shape to the visual... During one of the most oppressive hot spells of 2024, our air conditioning unit died on us, totally passed from nature to eternity. Not pretty... We called around. We got on the world wide web. We scoured social media. We flashed the signal. We did everything short of sending out morse codes, faxed distress letters, and telegrams via Pony Express. Desperation setting in... Then, we call Cardarelli Plumbing and Heating of Quincy. Joseph answers. He tells us he doesn't do window AC units but knows a handyman named Richard who might be able to help. Joe also says he'll call Rich immediately when we hang up... Thank you, Joe... 1800hrs... Rich calls. He asks pointed questions about what we need and promises to call the following Saturday morning... Rich came by with his teammate Michael and installed our window unit and a few other handyman jobs. Good fortune... Fast forward to Saturday night live. (Lite humor there.) Temps are cool now. I'm kicking back watching the Red Sox comeback vs. the Dodgers of Los Angeles and counting my blessings. Life's good... If you need a handyman from Wareham to Bridgewater to Braintree to Quincy, Massachusetts, call Rich 857-261-8886. Thanks again, Joe of Cardarelli Plumbing and Heating. Appreciate the assist in finding Richard and Michael. Appreciate you... You're the best... In short... It all went very well and I'm very happy with the results. Joseph was a godsend. Rich and Mike were polite, friendly, and timely. You all take your work seriously, and it shows. Lastly, Rich gave me such a fair price and was so accommodating, helpful, and eager to please that I paid him double. And that's that. (Insert smiley face here.)

Look no further! Level of service and professionalism you…read moredon't see every day. Keisuke was prompt, courteous, and quickly diagnosed and fixed the problem. Highly recommend! Thank you Keisuke!

Done as expected. A bit delay due to busy schedule. I have to push multiple times to kick off the…read morestart. But the job is done well.