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    Building energy audit

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    HVAC system maintenance

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    C W Heating and Cooling

    C W Heating and Cooling

    (4 reviews)

    Holy cow, this guy couldn't possibly be any nicer! My condo was built in 1969 and the zone valve…read morewas stuck so the heat wouldn't shut off. Charlie did some trouble-shooting over the phone (no charge) and came the following day before noon. After looking it over, he determined the system was super old and made several phone calls to find the correct replacement part which in itself hasn't been easy. He explained a bit about how the system worked (I hate not understanding this stuff!) in a simple and non-condescending way, which I really appreciate. Lastly he was very fair with what he charged me. I highly recommend him!

    I will always be grateful for this company. My father, who is 84 yrs old, had trouble with his ac…read moreunit in his home and randomly called this company. Initially he was going to come out within in a week but quickly changed his mind when he heard my father was having heart surgery and would need the ac badly especially with the 90 degree weather returning. He ended up coming to the house 30 mins after our initial call after suggesting a few things for them to try without him having to come out. He was so very nice to my father and his wife. He fixed the ac unit and helped with other issues they were having. I would recommend this company to everyone. He was kind, knowledgeable and trustworthy. He did not pressure them into any services or new systems but gave them information on all their options. I just hope he will come to Medfield when I can get an ac unit!

    Zeolla Plumbing & Heating

    Zeolla Plumbing & Heating

    (48 reviews)

    Dishonest and high pressure sales tactics. I have a 3 fam that I rent out. One of my tenants…read morecomplained about not having heat. I made an appointment with Zoella for the next day. Upon arrival the tech called me and said my systems were so old they would not touch them. They said two were not working (which was a lie) and that I should replace all 3. They made a point to stress safety as their top concern and also said I would never be able to find parts. They quickly gave me a proposal and stressed that they needed to know right away to make it happen for the following week. All this despite having never even looked at my systems to see if they could figure out what was wrong. I was able to get another licensed heating company out the same day. The other company's tech confirmed that two of my systems were operating exactly as they should which was confirmed by my tenants. The unit that I called about needed a new transformer and it fired right up without issue and the tech confirmed all 3 units were operating safely. Zeolla operates akin to a dishonest mechanic or a surgeon doing unnecessary surgery, and these guys should be investigated. The worst part is that they were willing to let my tenant go without heat for an extended period of time in order to con me.

    This plumbing company is outstanding. We had them fix the toilet in our half-bath, and Mark was…read morevery knowledgeable and friendly. He kept us apprised of ho the work was coming, and he provided quality service to us. They are my go-to plumber from now on! They do it right, and Mark is an asset to the company!

    James Wu HVAC And Plumbing - Bosch 5 ton ultra low temp system

    James Wu HVAC And Plumbing

    (19 reviews)

    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.

    HomeWorks Energy - insulationinstallation - Updated May 2026

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