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    DGG Heating and Air Conditioning

    5.0 (3 reviews)
    Open 8:00 am - 6:00 pm

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    Services - DGG Heating and Air Conditioning

    HVAC installation or replacement

    HVAC system repair

    HVAC system maintenance

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    Galaxy Heating & Air Conditioning - Galaxy Services team

    Galaxy Heating & Air Conditioning

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    My wife and I recently hired Galaxy to replace our aging gas furnace and AC with a new 4-ton…read moreMitsubishi heat pump system, and the entire experience was fantastic from start to finish. During the estimate phase, Constantine was a breath of fresh air. Instead of pushing generic upsells, he actually "downsold" us by engineering exactly what we needed to work seamlessly with our home's downflow ducting. He was honest, straightforward, and clearly explained the system without any high-pressure sales tactics. For the installation, Mike and Diego were our crew. They arrived a little past the initial 9am window on the first day, but they worked incredibly hard and got the entire complex job done right on schedule. At the start of Day 1, I handed them a simple "homeowner's QA" list of things I wanted to check with them at the end. They were super nice, listened, and gladly accommodated every single request. The workmanship is top-notch. They perfectly sealed the exterior wall where the lineset exits, helped me get the Kumo Cloud Wi-Fi connected to my phone, and hauled away all the old debris, leaving the site spotless. As a testament to their technical skill, when I asked about the refrigerant line vacuum test, they had pulled it down to 350 microns--which is a great number and proves they don't cut corners! Pics attached of the final setup. If you want an HVAC company that is honest in the office and expert in the field, we highly recommend the Galaxy team!

    fair honest and respectful. They're not here to upsell you. They're here to improve your quality of…read morelife through heating ventilation and air-conditioning. They came out to fix my air-conditioning, which went out in the recent heat wave. It was a simple repair so they said no charge. This type of customer service is unheard of today's economy. I could think of at least one other service that would have tried to sell me a brand new system.

    Perfect Star Heating, Cooling, & Electrical - We are proud to be a locally owned and operated family business that services all makes and models in Alameda & Contra Costa County!

    Perfect Star Heating, Cooling, & Electrical

    (575 reviews)

    I had to have the air ducts under my house replaced and since I had used Perfect Star for my new…read morefurnace and AC unit I decided to trust them with this big job. Emmanuel V., Gabe H. And Diego R. were awesome! Professional and clean. They kept me in the loop and made sure that I was satisfied with their work. I would hire them again in a heartbeat! Thanks again guys!!

    This company is a scam. Do yourself a favor and go with another contractor you can trust who will…read morenot try to lie to you to get your business. I found this company based on all the wonderful Yelp reviews to tune up my old gas furnace- something I do every year before the winter season to ensure optimal maintenance. They came out and immediately refused to do the service citing possible asbestos tape. I asked how this was possible when the last 15 years I've gotten service and have even asked the contractors to do a visual inspection of my system. They weren't sure but said that another employee in the area can come look and give me an estimate for a new system. I thought this was shady and it turns out, I was 100% right. They came later that day and quoted me $26K for a new system not including subcontracting to get the asbestos removed (another $1500). I was told and shown pictures that there was evidence of the same tape inside the duct work. I was told I would get these pictures sent to me with along with the estimate but never received any of them. I got someone to come out and test a sample of said material for $100 which did come out positive for asbestos. However the only asbestos that presented any harm was the tape on the outside of the system. There was no asbestos inside but it was recommended that I do more expensive air testing since Perfect Star said I would not be able to use my heater without the asbestos getting released into the air. Not only was this stressful to hear right before the cold weather, but I was very concerned that over the last decade I had inadvertently put my whole families health in danger using this furnace. Meanwhile, Raymond Kinder texted me a few days later to find out if I was going to move forward with the new unit. I told him asbestos removal was my priority. His response via text was "if they remove asbestos, you will not be able to run that furnace as the gases will not be vented out properly." This was not true. After several weeks of not using my heater and exploring other options to deal with a pretend problem they created for me, I went with Air Quality Testing who charged $540 for an air test. $640 later along with having no use of my heater, I learned that there is no asbestos running through my air or ducts. Perfect Star literally lied to me in order to attempt to get me to drop nearly $30,000 on a new system. Stay away from this company! They do not deserve your business for lying to their customers.

    Eco Performance Builders

    Eco Performance Builders

    (68 reviews)

    I can't recommend these guys enough. Huge thanks to…read moreAlberto's team for doing a very thorough job.

    Earlier this year I hired Eco Performance Builders install a new heat pump system, remove my old…read moregas furnace, relocate equipment into the attic, replace all ductwork, remove existing attic insulation, air-seal the attic, and eventually reinstall insulation. The experience was outstanding from start to finish. What really set this company apart is that they actually performed proper Manual J load calculations to size the system--something almost no other contractor I contacted was willing to do (load calculations are code required by the way). Every other quote I received assumed a system size based purely on square footage and would have resulted in a dramatically oversized system. Instead, this team took the time to measure, assess, and design a system tailored specifically to my home's demand. They even performed a blower door test to quantify air leakage--another thing no one else offered. As a result, I ended up with a 2.5-ton heat pump. Meanwhile, all other companies wanted to replace what was there (4-ton) or go even higher (5-ton). One company wanted to put in a 100k BTU furnace which is absurd. Their design work was thoughtful and meticulous. The Manual J and Manual S calculations they did ensured that the system was sized properly including duct sizes and lengths. They showed attention to detail with locating and aiming registers to reduce duct lengths (less energy loss due to being in the unconditioned attic) and to improve comfort (limiting air blowing on you in bed). They also took care to locate the ducts so they can bury them in the future attic insulation as much as possible. The on-site crew was excellent--friendly, respectful, and professional every day. They kept the workspace clean, coordinated work around my partner's daytime sleep schedule, and were incredibly flexible with scheduling overall. I've had to push back adding attic insulation multiple times so I can do a few attic projects first, and they've never complained or made it an issue (I still am not ready and they are fine with it). The resulting system has been working great since they installed the heat pump and air sealed in May. The system is basically silent and my house has been quite comfortable. I'm pretty sure the system has been more efficient than my old furnace based on my energy monitoring system that measures current to the unit and PG&E bills from last year, and this is without attic insulation. Regarding cost, you would think that EPB would be significantly more expensive especially considering they will do the proper design work. However, I got a few quotes additional quotes and EPB actually end up significantly cheaper than all other companies that didn't include any real design work! In short, this is the only company I found that actually does things the right way, prioritizing proper design and customer satisfaction. I thought this would hurt the bank but it didn't. I'm extremely happy with the results and would recommend them without hesitation.

    DGG Heating and Air Conditioning - hvac - Updated May 2026

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