Wonderful skilled work from JDN! Nathan was awesome. Friendly, honest, and efficient! I highly…read morerecommend JDN and Nathan in particular for your HVAC needs! He saved the day!

Me, my dad, and my aunt and Uncle all use JDN systems. During the heat wave last week my…read moreair-conditioning stopped working. We had just moved in the previous July. We knew the air conditioner was old. Nathan was able to get it up and running again, but did snap a photo to show us that the air conditioner was from January 7, 1988. What an AC unit!!! It definitely deserved retirement. We were quoted a good better best scenario, and after considering we went with best. Because of the heat wave, they could not put it in immediately, but got us on the books as fast as possible and even texted a few times to make sure we were still up and running until they could install. Customer service is top notch!!!

Job not finished and being ignored. They installed the water heater on July 17th, 2025 and said he…read morehad to come back on Monday with his team to take the old water heater. He has not returned calls or messages. I had one conversation a week after and he promised to give me a date and time by Monday July 28th. He has ignored all calls, texts and has disappeared.

Very unprofessional, was given a date and time to come and do a job for me. Nobody showed or…read morecalled, I tried calling and nobody answered. Use a different company, not reliable.

Pete came out and diagnosed an issue with our furnace, what we originally thought was an issue with…read moreour nest. Turned out that it was the furnace purposely not starting because of a safety issue. He came out the next day and completely replaced our furnace. Highly recommend, very professional and clean!

Had this company come out had them troubleshoot my heating and cooling unit. They did a fantastic…read morejob. The best part of this company is they don't guess they get right to it and replace the right part that went bad. I recommend this company for all.

I live in Marengo, and I would recommend these guys any day of the week! I called their office on a…read moreFriday evening and Mark, the owner, picked up on his cell. He was able to help troubleshoot an issue with me, and it turned out that I needed a new hot water heater. Communication was great throughout the process. Steve was who I met at my house (technician or foreman, not sure) - he was also super kind and helpful. If I ever have any other issues in my house, I'll be sure to call Mark.

Completely lazy customer service, with mixed/improper expectations. Called for 3 days, each day…read moretold would be serviced later that day. Each day, no call, no show. Excuses each time pointing to bad to be management and disorganization. On the 4th day (today) , was told someone came out the prior evening but no one was home. I was home all day/evening and was awaiting the pre-call that I was told repeatedly that I'd receive, so I wasn't sitting by my door waiting for someone to knock. When I explained I got no call, they read back the phone number they had, which I had repeated every time I called, and the last 4 digits were swapped. The rep just said, "Oops, that's the problem then." Yeah, no one read call my number to confirm and recommended they start doing that after the rep gave another excuse of "receiving so many calls to their office." When I asked to get priorized today as my young child would be coming over for the weekend today and was told they could "try, but..." and when I explained this has become ridiculous they defaulted back to saying "no one was home last time we tried" and I referred back to THEIR expectations set that they would call when ON THEIR WAY, then why still show up when no one answered because they called the wrong number? The rep got incredibly irate and aggressive and I asked if I should call another company since they can't seem to keep up/adhere to expectations, to which she yelled "yes, I think you should" be hung up. I know this is the hot season and it's busy, so give proper expectations, confirm you have correct contact information, keep your customers updated and for God's sake, take accountability and hold your temper... Unprofessional, unreliable, incredibly unpleasant company to interact with.

Originally for no heating. Technician was amazing and explained everything that was going on!…read moreTurns out there was a lot more wrong than we thought. Got quoted for a great price on new parts and it was very affordable. As a new customer I was amazed with the service. Will definitely call again.

I have been their customer for over 15 years. They used to be excellent in providing services…read more Looks like the business has been sold and the new owners are not honest. In February, they told me that the cost to replace a board in the furnace was $850.00 in one of my rental properties . In the past if they quoted me a price of $850.00 the bill would be $850.00. This time in February billed me $1125.14 after quoting $850.00. When I asked to talk to the owner's daughter, the lady on the phone said that the owners daughter was on vacation and she would call me back in a week. I called again in March and asked to talk to Carrie, the owner's daughter. The same lady again said that Carrie is on vacation and she will call me back the following week. I still have not heard from Carrie. The crazy part is the February bill had a traveling charge! They have never charged me anything called traveling charge. On February 11th no one in the service industry had a traveling charge! Since I was a customer for over 15 years and Carrie and her family has provided excellent service, when I have been asking them to call me back for over 2 months, I am of the opinion that the business was sold and the new owners are not honorable. Their words don't mean a thing to them , examples: 1) Quoting me a price of $850 and charging me $1125.14 2) Telling me twice that Carrie or her father would call me back and have not. 3) Telling me Carrie is on vacation 3 times in l than two months!

We just had Jason repair and replace our old ducts for our furnace in our home. He did such an…read moreoutstanding job our house feels warmer already. Such a great custom job. We will definitely use him again.

Our Air Conditioning went out at 10:30 last Tuesday night. NextGen was able to get out to us…read moreWednesday morning to assess it and try to repair it. Juan was fantastic, keeping me informed every step of the way. Unfortunately, after trying to find a fix, it became clear that the unit (from 1998) needed to be replaced. NextGen was back the next day to replace our unit quickly and efficiently. The whole team was great, very professional, and easy to work with. Highly recommend!

I spoke to Andrew about a job I needed to be done. He was very professional and friendly over the…read morephone. He told me he would have someone come within 1 1/2 hours. His employee was right on time. Jason, his employee was also professional and friendly. He got the job done on a timely manner. He cleaned up after himself. The price was right and honest. I am very happy with the work and would recommend Andrew. I will be using this company again! I live in Carol Stream, Il.

Andrew Cotton answered me within minutes & made appointment for me for the next day…read more He was professional on time explained everything that was going on. He was impeccable & I would recommend him to anyone !!!! He went above & beyond my expectation. considering I have dealt with some others who took advantage because I am a female & I don't know about this kind of stuff. I will DEFINITELY RECOMMEND & USE him again for my house I trust his work percent. I really appreciate Andrew & his dedication to his work. Sincerely Vivianna Martinez

Integrity replaced our 20 year old furnaces and air conditioning units. They delivered as…read morepromised: timing, pricing, cleanliness, and follow up. Would highly recommend their services.

Very happy with my experience. They maintained my old unit, then replaced it when it went out and…read moremaintain my current one. I have referred several times, everyone is please with the people, prices and service they have provided.