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    Services - Sine D

    Electric inspection

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    After

    Denis and his team are great - hard-working, detail-oriented, and knowledgeable. We initially called Denis for an electrical emergency, and he came out the very next day. He quickly diagnosed the issue and explained that our existing breaker panel from the original construction was not wired correctly and showing signs of overheating. Denis provided a temporary fix to keep everything safe and clearly walked us through the problem, next steps, and his recommendations. He helped us get the necessary permit quickly and scheduled the full repair to replace the breaker panel without delay. The quality of their work is excellent, pricing is reasonable, and on top of that, Denis and his team are very nice people. I would recommend them to anyone needing electrical work done.

    Outside outlet installed with proper seals

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    Photo of Russ V.
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    2 months ago

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    Photo of Denis Z.

    Denis Z.

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    Photo of Rob P.
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    4 days ago

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    Denis Z.

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    Photo of Doug C.
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    2 months ago

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    Photo of Lauren L.
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    1 month ago

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    Photo of Denis Z.

    Denis Z.

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    7 months ago

    Helpful 1
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    1 year ago

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    Photo of Denis Z.

    Denis Z.

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    4 months ago

    Business owner information

    Photo of Denis Z.

    Denis Z.

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    5 months ago

    Excellent response time, good value for the work, and excellent service installing my ceiling light fixture. Will definitely use again!

    Business owner information

    Photo of Denis Z.

    Denis Z.

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    7 months ago

    Amazing qualtiy of work - Dmitri is the best! Good value and fast work done within timing constraints

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    7 months ago

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    Photo of Sasha R.
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    8 months ago

    Dimitri came within 2hrs of us contacting him (on a holiday weekend), and helped us resolved the issue immediately. Great service!

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    Photo of Denis Z.

    Denis Z.

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    3 months ago

    Business owner information

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    Denis Z.

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    8 months ago

    Business owner information

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    Denis Z.

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    3 months ago

    Business owner information

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    Denis Z.

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    1 year ago

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    Denis Z.

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    5 months ago

    Great care and fully explained all options. Highly recommended. Pricing was reasonable.

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    Photo of Denis Z.

    Denis Z.

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    1 year ago

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    Denis Z.

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    9 months ago

    Business owner information

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    Denis Z.

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    Photo of Katie W.
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    1 year ago

    Business owner information

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    Denis Z.

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    2 years ago

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    Denis Z.

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    1 year ago

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    Denis Z.

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    2 years ago

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    Denis Z.

    Helpful 1
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    Photo of Zach R.
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    7 months ago

    Helpful 1
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    1 year ago

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    Denis Z.

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    2 years ago

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    8 months ago

    Very prompt response and good polite service. Good knowledgeable professional. Did the job in a quick time.

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    Denis Z.

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    2 years ago

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    Denis Z.

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    Photo of S R.
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    1 year ago

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    Denis Z.

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    8 months ago

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    Denis Z.

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    2 years ago

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    Denis Z.

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    7 months ago

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    Photo of S B.
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    11 months ago

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    Denis Z.

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    1 year ago

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    Denis Z.

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    2 years ago

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    Denis Z.

    Helpful 1
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    Photo of Man D.
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    1 year ago

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    Denis Z.

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    1 year ago

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    Denis Z.

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    2 years ago

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    Denis Z.

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    1 year ago

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    Denis Z.

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    11 months ago

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    Denis Z.

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    2 years ago

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    Page 1 of 2

    Ask the Community - Sine D

    Review Highlights - Sine D

    Denis & team do the same and helped with many mini projects that have a huge impact on keeping my business running.

    Mentioned in 19 reviews

    Read more highlights

    Therma Tech

    Therma Tech

    4.9
    (704 reviews)

    Therma Tech installed our air conditioner, heater & water heater in June. The company utilized an…read moreoutside vendor for securing city permits and governmental energy abatements as well as coordinating for inspections post installation. They did an excellent job. Therma Tech installation team leader and members completed the job right on schedule. They were on time, courteous, patient in answering our questions, and kept the work area clean. The team leader and home office kept us informed of the process and the next steps thru out the whole time. We feel the costs we paid for the job were competitive. We would recommend Therma Tech to our friends and neighbors w/o hesitation.

    I had an excellent experience with Henry from ThermaTech. My HVAC system stopped working properly…read moreafter another company had spent about two hours diagnosing it and quoted me more than $3,000 for a new control board, contactor, transformer, surge protector, and maintenance plan. Henry arrived, clearly explained each step of his diagnostic process, and quickly identified that the transformer and contactor were the actual issues. He completed the repair in about an hour and charged me $540 total, saving me roughly $2,500 compared with the previous quote. What impressed me most was Henry's honesty, expertise, and transparency. He did not try to upsell me or replace parts that were not needed. He took the time to explain what had failed, why the system was not powering on, and what he was doing to fix it. It is rare to find an HVAC company that combines strong technical knowledge with fair pricing and integrity. I would absolutely recommend ThermaTech to anyone looking for an honest and skilled HVAC professional.

    Fuse Service

    Fuse Service

    4.8
    (1.5k reviews)

    We had Fuse Service install a new HVAC system for our home in June, replacing an old furnace and…read moreA/C unit that had run its course. This included removal of the old units and ductwork, new ducting throughout, a two-zone ducted heat pump system with two new air handlers, an outdoor heat pump, and a ceiling-mounted cassette unit for our primary suite (a room that gets a lot of direct sun and had always been tough to keep cool with the old system). Teodor, our project manager, did a great job assessing our home and specifying the system. The installation crew, Azamat and Val, did excellent, careful work removing the old system, running new ductwork, and installing all the new equipment. The install took about 7 days. Communication was great throughout; scheduling, installation, and permitting all went smoothly.

    We needed to replace our 35 year old AC unit that was on its last leg. We went through quite a few…read moredifferent estimates to migrate to a heat pump. Fuse came in significantly lower priced than everyone for a superior system. We wanted to add an additional vent on the main floor, and some dampers for a few of the vents and everything went like butter. Lex and Maxat were the nicest people, arrived on time, left at 6pm each day leaving the house clean. It was a 3 day install and they finished on the third day. Beyond what they needed to do, Lex walked through things that would be checked by the inspectors even on work they didn't do (GFCI plugs close to where the old unit was), and walked me through why they did some of the things they did because I was curious. We're 3 days in so far, but the installation experience was great, and the daikin system is cooling the house great (and I can already see from the energy monitoring systems we have, it's so much more efficient!).

    Freon Service

    Freon Service

    5.0
    (160 reviews)

    I hired these guys to install a heat pump. Their price quote was very reasonable compared to the…read moreother quotes i got. Additionally, they were very knowledgeable about all the options I had. Once I picked the unit I wanted the installation process went very quickly. Everything was done on time and all the areas were clean. Special kudos to Jessica. She is a very hard worker, extremely professional and very personable. She helped me on numerous levels. I would definitely use them!!

    I decided to use Freon Service for my 200A electrical panel upgrade after having a great experience…read morewith them for an HVAC replacement back in March 2026 (feel free to check out my previous review!). Dennis Sushko and Slava (Comfort Advisor) came to my house to walk the site, review the scope of work, and thoroughly address all of my concerns. Jessica in the permit department was fantastic with scheduling--she was incredibly proactive, kept me updated every step of the way, and even helped fill out the paperwork for local rebates. On installation day, Tony and Adam showed up right on time. Both were extremely professional. Because of tight space constraints on my wall, they had to work extra hours to complete the installation in a single day so I wouldn't be left without power overnight. They also did a spotless job cleaning up the workspace before leaving. I strongly recommend Freon Service to anyone looking for HVAC work or an electrical panel upgrade!

    Air Sharks

    Air Sharks

    5.0
    (99 reviews)

    Service requested: HVAC replacement. However, after the initial inspection the engineers told us we…read moreneeded to changed the ducts and insulation coming into our house to improve efficiency. It was an expensive upgrade but was the need of the time considering even a top notch system would only work at 40% efficiency. Engineer was thorough in examination. She took lot of photos. Explained the process. Air sharks didn't push for purchasing any particular equipment. We chose Daikin. Service: the work crew is very disciplined. Arrive on time. No loud noises. Informed us daily at the end of the day. Kept our house and side yard clean and tidy. Follow up: the inspection went well. We received the permit as per schedule. First year warranty is included. Whenever, we have called they promptly respond and understand our issue at hand. Over all we are beyond satisfied with contracting with them.

    Air Sharks has done my furnace heating tune ups in the fall and AC tune ups in the spring every…read moreyear for the past two years. I've also had them replace the air ducts under the house which were old and not efficiently moving the air into the vents. With each visit, the techs were very professional and informative while performing the services. Before the air duct replacement, one of the project managers visited and was very thorough in explaining other services such as water heater vs. heat pump replacement and insulation. Communications with this company are also very good. It is easy to call when I need to schedule services and they also keep me up to date on the appointment arrival times via text messages. I highly recommend Air Sharks and plan to continue using this company for future services and projects.

    Sine D - electricians - Updated August 2026

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