My heating stopped working right before the 20" snowstorm. David came to my home three times and spent a total of six hours troubleshooting. He finally solved the issue -- a problem so rare that even my HVAC‑specialist friend couldn't diagnose it. I'm truly grateful for the outstanding work David did. He was a real life‑saver. And just a note: if he doesn't pick up your call right away, don't worry. It simply means he's busy, and you can trust that he will always keep his promises, fix the problem, and make sure your home stays warm and comfortable. read more

David came today to service my central ac unit. Just a great guy so happy that I found him. He's first class a gentleman And he is highly skilled. read more

Over the past few years, David has been my go-to HVAC guy. He has done everything from replacing 2 zones of central AC (compressors and air handlers), to servicing my existing boiler and pumps, ultimately replacing it altogether. The pricing has been very fair especially compared with the big Long Island HVAC companies, he provides options and explains them, he knows a great deal about the product manufacturers, and he has helped me out in emergency situations. Note that he does have constant work so may not be immediately responsive, but I think it is acceptable since he gets back to you directly- not a salesperson or a secretary. I would definitely recommend. read more

be careful about this scam. David said he will charge an amount for call and compensate with the labour. he installed a google neat thermostat and connected C wire at the boiler. he was trying to charge me three times of normal price and negotiated at double price. he installed at main floor and when my tenant checked the upstair and that doesn't work. though he mentioned he will fix upstair if it doesn't work. he is not picking up phone amd answering text. please be very careful about this gentleman While engaging him. read more

Service postponed to early spring! Personal Health issues DWP got back to me very quickly! Seemed very capable of tackling any job I needed done! Will be using them again in the future! read more

It was 20 degrees outside and started snowing, then the heat would not come on. Our normal guy couldn't come till the next morning but the house was freezing. Thankfully David came out in the snow to help us. Super friendly, helpful, and responsive. A good price too for easing our anxiety. I would use him again in the future and recommend him to anyone who needs work done. read more

We were desperate and DWP HVAC saved us one freezing February day. We came on time on a Saturday and quickly got our heater working. He was a good deal for sure and value for the price. We needed them again when a little later this winter our hot water heater broke. He fixed this ordered parts and came back to service the heater. We have been good to go. While we hope we don't have to call DWP but any heat air problems we may encounter in the future , he's our guy! read more

I employed David to replace my Water Heater. He assured me he could handle the job, but it turned out to be a near deadly mistake. He purchased a tank that was larger than the one I was previously using. He did not measure anything before purchasing the tank, and as a result, the factory draft diverter on top of the water heater did not provide enough room to properly pitch, so he simply did not install the factory draft diverter and instead, he crafted his own makeshift diverter. He did not consult with me during this process; he simply decided to do this on his own without even checking to see if this was something I wanted to do. A few days after installation, I noticed a weird smell that would come from the water heater room everytime we showered or used the dishwasher. It smelled like smoke, so I called David. He said it was probably a dirty chimney causing the smell. I called a chimney company to come inspect and they said my chimney was perfect clean and wasn't dirty at all. David kept saying the diverter he made was perfectly fine, but when I consulted with 3 separate plumbers -- one of whom is a certified Master Plumber -- they each said that the makeshift diverter he used was not a proper solution for a water heater, and that Carbon Monoxide was most certainly leaking into our home and that it was an extremely dangerous and careless installation by David. I called David to ask that he come back to fix the problem but he did everything he could to deny responsibility. He said that it would still pass inspection, and that everything was fine. Again, 3 separate plumbers all disagreed and they told me that this was extremely dangerous, so I had to turn off the Gas and let all the air out of my house for an entire day, and I kept my kids out of the house for an entire day to ensure their safety. I tried calling and texting David repeatedly but he just stopped responding. I had to call in a new plumber to come and fix the problem, causing me to spend an additional $2,000 on top of what I already paid David. David was careless (did not come ahead to measure to ensure the new heater would fit), he was lazy (when he realized the new tank wouldn't fit, he could have returned the tank for one that would fit but did not to so), he was not communicative (he did not tell me about his plans to make his own draft diverter), and he was reckless. I gave him so many opportunities to come back and fix the problem or at least provide a refund, but he simply did not respond at all. Please do not use David for any of your HVAC tasks. Someone who is willing to endanger the lives of an entire family is not someone I would employ. read more

Another great job saving us. This man is amazing. Can't thank you enough David. Highly recommend.

DWP is a professional company that preforms their work with a high quality. David was OnTime with the estimate and completion of the installation. I look forward to working with David in the future. Very good company. read more

DWP HVAC-R SERVICE - Installation. - Heating & Air Conditioning/HVAC Near Me

I can't recommend David enough! My heating system was acting up, and he came out quickly, diagnosed the issue, and had it fixed in no time. Not only was he professional and knowledgeable, but he also took the time to explain what was wrong and how to prevent future issues (along with proper maintenance that was never explained when the furnace was installed) The pricing was fair, and the service was top-notch. If you're looking for a reliable HVAC expert, this is the one to call! read more

My Central Air stopped working last October. Earlier, in the spring of 2024 it went out and I called Universe. They got it working but working with them was horrible. So, this time I needed to find a company with integrity and the expertise to fix the system. After seeing great reviews for DWP HVAC I contacted them. David (the owner) came on the day and time we had scheduled. Even though my Lenox unit is 22 years old, Dave was able to repair the problem. But unlike Universe, Dave was extremely thorough. After getting the system to work again, he checked the refrigerant which was a bit low, added new refrigerant, used a special solution to clean the unit, rechecked the coolent level, went to the attic to check the overflow pan and the condensation drain. He then used pressurized nitrogen to blow out the condensation drain. And after all that he asked for a gallon of water so he could ensure that the drain was clear. Finally, he had me check the vents to ensure that the unit was providing cool air. The experience was extremely impressive. This was so so different from my horrible experience with Universe. And all for a very fair price. What a pleasure. I highly recommend DWP-HAVC if you have an issue with your HVAC. read more

David was responsive and diligent in repairing the heat problem at my home. He tried best to save money for me and followed up to see if everything is working. read more

David is the legitimately the best HVAC service person on Long Island. He's thorough, knowledgeable, and works hard. He does a great job and is honest. We worked with him multiple times and he always tries to do the right thing for us. If you don't use him, good luck with someone else. Your loss. read more

I cannot recommend David highly enough! This is my third time working with him, and once again, David exceeded my expectations.His honesty, skill, and professionalism made them my go-to for HVAC services. This time, it was an emergency with my hot water boiler leaking. I reached out, and just like before, he responded with urgency, expertise, and exceptional service. In a stressful situation, his reliability was a huge relief. If you're looking for a trustworthy, knowledgeable professional who genuinely cares about his customers, look no further. Would highly recommend them to anyone in need of HVAC services--whether routine maintenance or emergency repairs! read more

David is a very cool guy. Just purchased a house and I knew nothing about central ac units. I called him after reading his reviews and I'm glad I did. He came out, explained everything in detail and charged a reasonable price. He took his time and really made an effort to teach me about the ac unit. He even looked at my furnace and identified an issue i wasn't aware of but could fix myself. I'll definitely be calling on him again! 5 stars for sure! read more

We had an issue with our Central air, the house wasn't cooling down so we called David for help. He responds to text and phone calls. He was able to give estimated times for arrival. David is very thorough and patiently answered all of our questions. He is very knowledgeable and went through everything step by step in order to solve the problem that we had. He wore protective shoe covering as we are a no shoe home, very respectful We will definitely be calling David to handle any heating or cooling issues in the future. read more

David had done some work for us in the past and did a phenomenal job in fixing our furnace and returning to install a new expansion tank. He was patient and knowledgeable and answered all my questions. He even answered some questions about my heating system unrelated to the job and offered some advice. I recently called for a quote from David for AC split units. He was curteous and offered help during a heat wave. Unfortunately my timing wasn't great and could not accommodate. But if you are looking for a great HVac guy, David is your guy. read more

David was great. Easy and responsive communication via yelp messaging then text. Arranged for next day visit and he texted 40 mins beforehand to ensure I was home and available. Came by, asked a bunch of questions to diagnose the situation and knew why my central AC in zone 2 wasn't cooling. Advised a seasonal cleaning of external fins and refilled refrigerant to optimal capacity. Took his time and throughly explained the inner workings of the system. No upsell to a new unit or replacing of phantom broken parts. Very different from the company from last year coming for a general checkout of the system cautioning the need to replace the entire system. Zone 2 cooling and working great. Will definitely call David for pre-winter checkout of the oil furnace. read more

David is responsible and knows what he Is doing. He was able to repair and charge my HVAC system and saved me a lot of money and grief compared to getting a new unit. He responds the same day, answers all my questions and is very pleasant to work with. I Highly recommend him and his company. read more

"FIVE STARS, ANGEL. FIVE STARS!" Lil Nope movie reference there. Anywho... Thank you, Yelp! I have found my forever HVAC bro! Long story short, I had no heat. Reached out to a few HVAC folks here on Yelp. They all had a fee to come out an inspect. No problem. David had the most reasonable price. He was busy with another job all day and visited me around the time folks are on their way home to relax. I can't tell you how much I appreciated that! I mean, if he'd said he was done for the day, I would've understood! But, nope, he showed up, inspected, put in some WORK and his final price, very reasonable!! I thought I was going to have to replace all the radiators in the home or something! David pinpointed the problem and BAM, I had heat once more! David took the time to explain how stuff worked and why this was doing that and that was doing this... Aaaaand, he likes cats! Greeted my fur baby upon entering the home. If you're cool with cats (all animals, actually), you're cool with me! I seeeeee why he has so many 5 star reviews! Continued success!!!!!!!! read more

A+++ Wow! My mother's central air had stopped working and David fixed it and did an amazing job. Kind, smart, great price and such a wonderful find. Thank you, David!!! If you need AC work, look no further than David! Top notch! read more

Where is my orignal review of David?! I think there are enough of reviews here validating how awesome David is. He is my go to HVAC going forward!! PS. really love him respecting Asian household by putting a shoe cover when he entered to the house!! read more

I had lost my a/c I found David here on Yelp. He was able to come out to look into my problem. Turned out to be a simple fix. David is truly an honest guy, and I would recommend him to anyone. Thank you David read more

I requested a quote from yelp to get a 9 year old HVAC condenser replaced. David answered my request and came to take a look first to see if I needed to replace the unit. Upon inspection it was determined that I did need a new unit. He was patient and honest about his assessments. I felt he was trustworthy so I asked him to install a new condenser unit as well as a c wire for my new smart thermostat. His service was great. I highly recommend his services and will be using him again when my other units need to be replaced. read more

I reached out to David over Yelp about a group of mini-splits that weren't cooling, and he responded within minutes. Upon arrival, he was able to easily diagnose and resolve the issue. David also took some time to explain how splits work and took a look at the (unrelated) steam heating system in the house and gave out some pointers there as well. Appreciated all the advice! read more

Our new steam boiler was making strange noises, so I suspected it was not installed properly and called David. He came by the same day, confirmed that it was not wired properly or pressurized correctly, and redid all of the wiring and fixed everything. He then followed up with me to ensure it continued to operate properly. He is an incredibly nice, available, and communicative technician. read more

We needed emergency repair of my tenant's central air conditioning and David promptly responded.He diagnosed and fixed the problem right away.Very professional and highly recommended. Thanks much David you made our day!! read more

David was great. Gave him a call in the morning and said he would be able to come either later in the evening or the next day which is July 4th. Hard working, reliable guy. Gave a heads up before he came over. Assessed the issue, gave his recommendation and my AC unit is pumping cool air again! Problem fixed and the price was very reasonable for the issue at hand. Thank you! read more

I called David on a Saturday at 3pm after a well know Long Island plumber cancelled on me last minute. The company I used last year to fix my boiler treated me like they were doing me a favor. I had a problem last year that was misdiagnosed and I was hit with a $ 700 bill that didn't even resolve my issue. David called me back within a half hour. He said he would try to come by but he had other jobs he was already doing. He texted me that night to apologize and to say he'd come Sunday. He came on Sunday and knew immediately what was wrong. He explained ahead of time what he was going to do and invited me to ask any questions if I wanted to. He repaired and replaced everything he said he would and even tried to save me money by not replacing the parts that he was able to use. He stayed 3 hours and got the heat running perfectly, made sure that there was heat to every room and followed up the next day to make sure all was well. His pricing was very reasonable. I consider him honest and reliable and would recommend him to anyone I know. Get away from these big name companies whose technicians don't care about you. David really cares and does amazing work. read more

wonderful friendly service. very pleased will use again. The young man who came over was the owner, and he was meticulous in cleaning the area before he left. He was very knowledgeable about the problem and offered numerous solutions. read more

David is a true professional at his work. He's knowledgeable and patient, took time to explain the problem and was able to fix everything. If you need any HVAC-R work, he's the guy, I HIGHLY recommend him! read more

Responsive. Knowledge of the work and quality. On time and good price. Will use this service again. Thank you Dave read more

Our AC unit started blowing hot air all of sudden. We called David late at night but he still came out within two hours. He figured out pretty quickly what the issue was. Considering it was an emergency call, past normal working hours, his price was reasonable. Very professional and humorous as well. We will def. reach out to him in the future. read more

Switched my old steam boiler thermostat to a nest thermostat . Also gave me some tips on how to maintain my steam boiler . Very professional and organized . read more

David was responsive and came same day to fix our centrali air system in an emergency. He identified and fixed the problem in less than 30 minutes. He was very polite and reasonably priced. Will definitely be making David my main HVAC contact. read more

I reached out to David via Yelp and he was responsive and accommodating to assess why our central cooling wasn't working. He was knowledgeable, attentive, and meticulous. He explained what was wrong with our HVAC system and condensers and most importantly he was able to address the issue right then and there. Highly recommend his services. read more

My house uses hot water boiler heating system with zone valves. David came in within 4 hours after my call. He came in and knew right away that air bubbles stops the water flow and needs to be purged (removing air from the boiler and the heating system, so that water can run freely.) He also helped fix my hot water boiler heating system with 3-zone valves. My 3-zone valves were a big mess, since it was connected in a way that only operate as single zone. I asked other technicians to fix it before, but they simply avoid doing so. It does take time, knowledge, and patience. Getting the 3-zone valves fix definitely saves energy (and saves a lot of money), since now I can adjust the temperature differently in each zone of the house. I agreed with other reviewers that David knows his stuff, and will definitely call him for services in the future. read more

David was unreliable and useless. He was quick to reply but failed to deliver. He led us on for over a week - each day our HVAC not working and getting worse. If you have 2 weeks to wait to get your issue resolved then he's your man. Every evening he would call saying he'd come the following day. FALSE, leading for constant follow ups and making me believe this is a scam. If I could give 0 stars I would. read more

David came at a late hour to help us have a nice cool night. He gave great advise for future maintenance and keeping thing running. Very fair gentlemen! Will def call him when in need. read more