Gas Furnace Installation in Findlay, OH 45840
August 21, 2026
“Bob and Rob, installed my new HVAC and pro series thermostat, in record time, perfectly! They were absolutely courteous in all interactions and I couldn't get them to take their cash tip. They wrote on my tip envelope, "Thank you for your service, Patrick!, to top it off! This has been the par for the character of Knueve's staff on ALL my occasions in dealing with your fine company.”
- Patrick K.
Water Treatment Maintenance Installation in Continental, OH 45831
August 14, 2026
“I cannot remember the name of the guy who installed our system, but Rodney was the initial contact. Every time we call Knueve, the service is top notch. They're thorough, knowledgeable, and efficient. They have quick response time too! Super grateful to have Knueve close by to call.”
- Savannah H.
Water Treatment Maintenance Installation in Fort Jennings, OH 45844
August 13, 2026
“Rodney and Jordan provided great service, were very knowledgeable and installed an effective system. They definitely knew what they were doing. Rodney was very good at listening to concerns and directing us to the best solutions.”
- Nichole G.
Air Conditioning Installation in Elida, OH 45807
August 12, 2026
“Very efficient, friendly and knowledgeable”
- Richard D.
Air Conditioning Installation in Lima, OH 45805
July 20, 2026
“Bob arrived at my home at 845am to install a new a/c unit and gas furnace. Bob was very courteous and friendly. BOb worked very hard in hot muggy conditions and our new system installed and up and running by 1130am. He went over operating procedures and explained to me about there maintenance program. Bob is a professional at his craft and cares about his customers.”
- Mark B.
Water Treatment Maintenance Installation in Grover Hill, OH 45849
July 15, 2026
“Derrick did a great job installing our water treatment system. When he encountered something he didn’t know he said so and consulted with another person higher up. He works well alone and gets the job done.”
- Ronny C.
Air Conditioning Installation in Ottawa, OH 45875
July 15, 2026
“We can not ask for better service and professionalism than Joe Knueve. Joe has been at our side for all our houses (5+) and never fails us. He is always prompt and friendly with so much knowledge (and wit) – insert smile face. We cannot say enough good about Joe and we recommend his service to everyone. Thank you Joe – your kindness will never go unseen. BTW it's difficult to choose "a service" because Joe has helped us with EVERYTHING we need, either himself or getting the expert we need.”
- Millie M.
Shower Fixture Repair in Findlay, OH 44817
July 14, 2026
“Reese P. Fixed our shower problem today. He was very nice,informative, and polite. Thanks for sending him today.”
- Judy M.
Dual-fuel System Installation in Holgate, OH 43527
July 11, 2026
“Non & Rob were very nice & polite. No mess very good people”
- Wayne W.
Air Conditioning Replacement in Lima, OH 45806
July 1, 2026
“It took some doing but the system seems to be working great now. Reese and Derrick were great. Rodney was willing to do whatever it took to make it right.”
“The guys were professional and fast.”
- Deron P.
Air Conditioning Replacement in Ottawa, OH 45875
June 30, 2026
“Responded quickly to my request for a quote. Came right on time for speedy and professional installation. Cleaned up after the install was done. Couldn’t be happier with this choice.”
- Toni S.
Gas Furnace Replacement in Van Buren, OH 45889
June 29, 2026
“Fantastic crew. The furnace and AC replacement was completed in 4 hours. It is working very well and with a hot week here (June 29-July 3rd) we are happy to be cool again. Great job guys!!!”
- Joe and Ruth B.
Ductless System Installation in Defiance, OH 43512
June 25, 2026
“Bob, Rob, and Don installed mini splits for us, one upstairs and one downstairs. It took them less than 4 hours and everything is perfect. Thank you!”
- Tira B.
Generator Maintenance in Findlay, OH 45840
June 24, 2026
“Exceptional service. Eric explained everything clearly and is professional. Another quality service offered by Knueve.”
- Scott H.
Ductless System Installation in Findlay, OH 45840
June 17, 2026
“Bob and Rob did a great job installing our new mini split system. They were very polite, easy to work with, cleaned up any messes. They showed me the basics of running the system to get us started and left an instruction manual for us. It’s hard to find good companies with great service but you guys nailed it. We will use your services again.”
- Mike H.
Dual-fuel System Replacement in Findlay, OH 45840
June 2, 2026
“Nicest guys you could ask for. Efficient, informative. Left site swept clean like they were never there!”
- Paul M.
Heat Pump Repair in Findlay, OH 45840
May 21, 2026
“Mike and Donald were great!”
- Tim C.
Detector Replacement in Kalida, OH 45853
May 19, 2026
“Joe was very professional, prompt, and knowledgeable. Can’t ask for any better person or service!”
- Richard M.
Dual-fuel System Installation in Columbus Grove, OH 45730
January 7, 2026
“He was great and honest about what he found.”
“Bob and Rob installed a new furnace/heat pump in my home. They are 2 of the nicest gentlemen, very patient and did a great job installing new system. They cleaned the area they were working in before leaving. Today Mark came back to my house to answer questions about my new thermostat. He was also patient, and informative, helping me to understand the different screens. Overall an excellent experience! Thank you everyone!”
- Sharon L H.
Gas Furnace Maintenance in Elida, OH 45807
November 20, 2025
“Mark did a great job on our annual "tune up" for our furnace and generator. Polite, courteous, and efficient.”
- Matt M.
Water Treatment Maintenance Replacement in Cloverdale 45827
October 8, 2025
“I was at work and the guys showed up while the wife was getting ready. Ryan and Jordan showed up and got to work right away replacing a very old water softener. The wife left and they continued to work. Replaced a valve that was leaking and showed us how to use the new one. Love the Knueve team!!!”
- Andrew H.
Generator Installation in Defiance, OH 43512
September 5, 2025
“We have used Knueve & Sons for many of their services, most recently generator installation and plumbing. They are knowledgeable, experienced professionals who do the job right. They offer excellent products and provide superior support, whether in the office or at the site. We will use no other company.”
- Mike B.
Air Conditioning Installation in Findlay, OH 45840
July 21, 2025
“Bob & Rob did a fantastic job installing both a furnace and air conditioning system. They did a great job explaining the technical details, and were most efficient doing their work.”
- Keith J.
Thermostat on Garage Heater Replacement in Ottawa, OH 45875
April 29, 2025
“The garage heated up to 100 degrees or more and I had difficulty shutting off the heater by turning off the thermostat. The repair person came and clearly laid out out options. He then replaced the thermostat. Everything now works well. Thanks for taking care of us.”
- Wendell B.
Gas Furnace Repair in Elida, OH 45807
February 16, 2025
“I was out of town for work when my Wife called me at 7:30am to advise me it was 54 degrees in the house. I called the office and they had someone there within 90 minutes and the furnace was working by 11:00am. They always provide great customer service. They have installed a furnace, central air, a tankless water heater and a generator for us. I will not use anyone else.”
- Chris B.
Gas Furnace Repair in Oakwood, OH 45873
February 11, 2025
“During the recent cold snap our furnace stopped working on a Sunday morning. I called the emergency service number for support and Dan arrived shortly after I called. He spent most of the day Sunday diagnosing and attempting to repair the problem. It turned out to be a faulty component on the recently installed furnace. It took a few days to get the replacement part, so Dan set up temporary heaters to get us through until the correct part arrived. He went the extra mile to ensure our home (and water pipes) were protected in this very cold weather. Great service!”
- Steve F.
Gas Furnace Repair in Defiance, OH 43512
February 3, 2025
“Charged me 409.00 to charge a 20 dollar part that took 15 minutes on top of the 95 service fee . Do. Not. Call. These. People.”
- Mark B.
Air Conditioner Installation Replacement in Ottawa, OH 45875
June 23, 2023
“Mark, the Technician showed up on time and was very professional and did an amazing job! I would recommend Knueve and Sons to anyone looking to get their furnace serviced!”
“Outstanding service and support from the entire Knueve team! The customer service provided was absolutely timely and professional. Anyone considering and HVAC contractor should give Knueve & Sons strong consideration. Thank you Knueve team for your support and cooperation! Your effort and support did not go unappreciated.”
- Rick w.
Gas Furnace Replacement in Leipsic, Oh, 45856
February 12, 2023
“We had a no heat situation with our furnace while I was out of town and my wife was home. I contacted Knueve’s and in less than an hour on what I could tell was a busy day, Deb had Greg at our doorstep to check it out. They needed to order a specific part that they needed to make the repair but Greg was able to substitute another part and get the furnace running to keep the house warm until the new part arrived. There ended up being a couple issues with the part that required Greg to return for adjustments, which he did very promptly at no additional cost. We couldn’t be happier with the service we received. Thank you!”
- Mark D.
Furnace & Water Maintenance in Kalida, OH 45853
December 26, 2022
“Due to the events of the recent winter storm, our family lost function of our furnace and suffered busted and frozen pipes/no water. Being the Christmas weekend, we elected to wait it out and called Knueves first thing Monday morning when they opened at 7am. By 7:30 Joe was at our door and by 8am, he had our heat restored. Shortly thereafter (within minutes), Ryan and Tony arrived to tackle our water issue. In a very short time, they had our busted pipes fixed and water was restored. After they left, I had additional questions and Tony promptly returned to answer my questions and offer further advice. Thank you, Knueves, for your amazingly prompt response time and exceptional service! You helped return our lives back to “normal” with speed and quality work. Thank you!”
- Matt H.
Air Conditioner Installation Replacement in Defiance, OH 43512
August 16, 2022
“Great work done to replace our A/C central air and furnace-all while we were on vacation 🙂 High recommendations for this company!”
- Denny & Sheila M.
Gas Furnace Repair in Findlay, OH 45840
March 30, 2022
“Service beyond expectation!!”
- Fred H.
Plumbing Repair in Ottawa, OH 45875
October 27, 2021
“Another reason that you are my first and only call when emergencies occur. From my initial call to the service being performed I received nothing but efficient professionalism. A technician was able to be dispatched right away to come diagnose a “No water” issue from my well pump. When he arrived he was attentive to my explanation of the problem and then got right to it. He was able to accurately diagnose it immediately and replace the offending part of the system in mere minutes. From the time I called to job complete I might have only been out of water for a couple hours. Got to love this well run family business with Karing and Kompetent employees.”
- Pat T.
Gas Furnace Repair in Continental, OH 45831
February 17, 2021
“Our furnace quit working at the start of a projected blizzard. We called the guys and they were at our house in less than half an hour! Super friendly, the tech didn’t mind having to explain what he was doing and why..not once, but twice! Highly recommend! Thank you for awesome service!! God bless.”
- John B.
Plumbing, Electrical, and Hvac Services
July 6, 2020
Quality work. I use them for plumbing, electrical, and HVAC. Trust them to do a good job.
- Carroll L.
Disposal Replacement
June 30, 2020
New disposal, great job.
- Robert L.
Air Conditioner Repair in Defiance, OH
June 27, 2020
Job well done. It took them 7 hours to take out the old furnace and heat pump, and install the new furnace and air conditioner. They answered all our questions throughout the day.
Quick Response and Repair. Quickly fixed AC System.
- Joe S.
Ac Repair in Defiance, OH
June 22, 2020
Fixed the issue quick and at a good price. They were out shortly after I called them. Fixed the AC quickly. The price was good. Also, they had installed this unit years ago, and they were exceptional then. Took shoes off in the house. Cleaned the mess before they left.
- Paul P.
Hvac Installation
June 19, 2020
Quick, friendly and very professional. Very happy with the results. Good product and a clean installation that was done quickly and efficiently.
- Jeff S.
Water Heater Installation
June 16, 2020
Totally happy with the experience. Techs did a timely and efficient installation of my new water heater.
- Sandra L.
Ac System Repair
June 12, 2020
Nice greeting when I called in, we set up a service call quickly. I was called when the service tech was on the way. Upon arrival the system was checked out, diagnosed, and was back in service in a short time. Very happy with the service all around, and I would not hesitate to call again when needed.
- Ken G.
Best Hvac Service Around
June 12, 2020
Great people, best services, easy to deal with. They’re able to install and service anything.
- Bill M.
Excellent Hvac Work
June 6, 2020
Excellent work. Will use again.
- Mike L.
Repeat Excellent Service
June 2, 2020
Excellent service, I’ve always received excellent service!
- Holly P.
Plumbing Service in Ottawa, OH
May 29, 2020
Fixed my toilet and were professional.
- Nick S.
Air Conditioner Repair in Leipsic, OH
May 15, 2020
Fast to reply when needed. Not often needed, my systems run very well. Quick to help with any water quality questions.
With the Komfort Klub preference, service is always timely, quality of work is above average, and all issues are well communicated.
- Meadows O.
Excellent Hvac Company
May 15, 2020
Definitely a great group of guys to work with. Been using your company for years. Service has been excellent and guys have been very good and respectful.
- Andy S.
Recommended Hvac Service
April 24, 2020
Great service. Did a great job, I would recommend them.
- Nathan W.
Great Service in Delphos, OH
April 9, 2020
Great service.
- Scott S.
Boiler Repair
April 9, 2020
Boiler Repair. Fast reliable service.
- Robert S.
Knowledgeable Hvac Personnel
April 5, 2020
Knowable workers. HVAC personnel very knowledgeable.
- Carroll L.
Hvac Job Well Done
April 5, 2020
Job well done. Technician was prompt & did a very good job.
- Jeff S.
Water System Maintenance and Repair
March 20, 2020
Excellent work. When we suddenly lost water at our house, I gave Knueve & Sons a call and they were quick, courteous and fair priced. They had us back up and running in no time!
- Billy R.
Fast and Quality Service
March 9, 2020
Fast and Quality Service. Great Service.
- Joe S.
Very Prompt Service
March 6, 2020
We are happy with their service. They showed up when they said they would, and they replaced our water system.
On time and excellent work.
- Roger K.
Always Quality Hvac Service
February 20, 2020
Always quality service. Great service. Technicians are always professional.
- Charles M.
5 Star Hvac Service
December 3, 2019
5 star service. I have always been satisfied with their work. They have installed a new water softener and peroxide system for me, a new furnace and AC. I use their salt and peroxide delivery service. Definitely recommend.
- H H.
Very Professional Hvac Company
November 25, 2019
Professional Service. The service was excellent and the techs were great. Awesome work.
- Mike L.
Really Great Hvac Service
November 16, 2019
Great service. Always pleased with the work they do.
- Charles M.
Furnace Installation in Lima, OH
October 20, 2019
Excellent. Enjoying the heat from the new furnace. Excellent service in the installation. Very glad we did it.
- Lyman M.
Consistent Hvac Service
September 13, 2019
Prompt response to my online service request. Have used Knueve for the last 5 years for all my plumbing and HVAC needs.
- Scott K.
Good Hvac Work
August 19, 2019
Do excellent work, all around good work ethic.
- Jennifer J.
Very Reliable Hvac Company
August 19, 2019
Great employees and service. We are very pleased with Knueve & Sons. They are reliable and courteous.
- Greg H.
Caring Hvac Company
August 5, 2019
No problems, good crew on duct work. Good job, no problems.
Wonderful they really care. Why would you call a company from the big city. Every person who works there cares about your family. I will never call call any one else.
- Bill M.
Very Clean Hvac Service
August 1, 2019
Always good service. All their technicians are polite, efficient, well trained and clean up after they are done.
- Charles M.
Other in Defiance, OH 43512-2868
August 1, 2019
“Rodney was very friendly, professional and knowledgeable. He patiently answered all our questions and concerns when we were deciding which central air system to choose. He showed us exactly what they would be doing as far as the AC, furnace and AC lines running from the AC to the furnace. He made us feel confident that the work would be done right and was quick to answer my follow-up questions by email, literally in just a few minutes.”
- Carl Q.
Bathroom Remodel in Kalida, OH 45853
August 1, 2019
“Without Going Into To Much Detail The Service That We Received From Dan And The Company Was Bar None The Best Experience With Customer Service We Have Had In Years. They Went Over And Above To Fix Our Issue, And Did It Very Quickly. I Could Not Be Happier With Their Company, And The Service Dan Provided. If You Want True Professionals These Are The People To Call.”
- Kyle T.
Very Responsive Hvac Service
July 12, 2019
Very happy with their work. They respond quickly if there is an emergency.
- Jim W.
Very Prompt Hvac Service
July 4, 2019
They’re prompt and do a great job! We are very satisfied and enjoy the great service.
- Mike C.
Very Professional Hvac Service
July 2, 2019
Great company to work with, always on time and professional. Very satisfied with their services. Highly recommend.
- Ed S.
Satisfying Hvac Service
June 21, 2019
Job always well done. Always have been satisfied with the work.
- Toby S.
Pool Plumbing Service
June 20, 2019
Excellent Service, Quality Work, Timely Completion! This was a unique project requiring Knueve & Sons, Inc. to work very closely with an electrician to replumb a pool and repair a pool heater. Both companies worked very well together, performed quality work, provided great service and completed the project in a timely manner. Extremely happy with the outcome.
- Jon H.
Very Prompt Hvac Service
June 17, 2019
Great service, always friendly and do their job then go on their way.
Good service when I called. Servicemen were always prompt and did the job very well.
- Genevieve G.
Reliable Hvac Service
May 25, 2019
They did a good job. They have always been there when we needed them.
- George C.
Hvac Service in Glandorf, OH
May 18, 2019
Knueve & Sons does excellent work. Good response to calls.
- Jennifer J.
Outstanding Hvac Installation
May 14, 2019
Outstanding! Knueve & Sons, Inc. was just here to give us our twice-a-year preventive maintenance which they do through our service contract. They have exceptional service people. They are very polite and very helpful. They installed the equipment that we have right here in our house and are currently using maybe 22 years ago. It’s lasted that long. They’re very prompt. They do what they say they are going to do and they have good people working for them. I’m very satisfied with Knueve & Sons, Inc., and I highly recommend them!
- Marty H.
Plumbing and Water Filtration System Maintenance
May 13, 2019
Knueve & Sons, Inc. has been maintaining my plumbing and the water filtration system for over 20 years now. I called them recently when I had a leak in the water system. The oxide system takes care of the sulfur in the water. They got it fixed right away. Knueve & Sons, Inc. is very easy to work with and very convenient. I usually know the guys that work for them. I would recommend Knueve & Sons, Inc.
- Gerald K.
Sump Pump Installation
May 10, 2019
Friendly and professional! We have been using Knueve & Sons, Inc. for years and years and years. They were out here recently to install a sump pump for us, and the time before that to install a new furnace. Their employees are nice, friendly people, and they always provide us with professional service. Plus, they are a family owned company, and we live in a small town, so I think we should support our local small businesses! Particularly when they do such good work!
- Gary K.
General Hvac Maintenance
May 8, 2019
Everything done properly.
- Nick S.
Generator Installation
April 9, 2019
Very happy with the work that was performed. I had a new Generac generator installed by Knueve & Sons. Everyone that was out on the project was very courteous, knowledgeable and informative. They do professional grade work, and I am very pleased with my decision to have them take care of this job!
- Ryan S.
Fast & Efficient Hvac Service
April 3, 2019
Very fast, efficient service. Having them come twice a year gives me peace of mind throughout the year as far as heat and cooling is concerned.
- Lyman M.
Pleasing Hvac Service
April 3, 2019
We have always had top notch service from this company. We have used Kneuve & Sons for almost 50 years and have never been disappointed. Great people, great service.
Very pleased with the service. Knueve & Sons have a very good response when contacted for any service request. We are very happy with the service.
- Mike C.
Furnace Installation in Bluffton, OH
April 1, 2019
I purchased a new furnace from Knueve & Sons, Inc. and they installed it as well. Everything was done on time and in good condition. The installation crew was personable, and I had no trouble at all with them. There was absolutely no clean up for me to do. They hauled off the old system and that was great, I did not want to deal with that at all! I want them to know that I appreciate the job that they did and I feel like they did a really good job of it!
- Robert E.
Air Conditioner Repair
March 27, 2019
Knueve & Sons, Inc. did a really good job for me! This was not my first time using them. They came out to fix my air conditioner and everything turned out great! The technician, Eric, was very friendly and respectful of my home. They are about a mile away from my home so I just asked them to call when they were on their way. I work about two miles from home so I met him there. Eric did the diagnostic and assessed the problem then explained what was going on and answered the few questions that I had. Their pricing is always fair and their service is always good which is why I keep going back! I would say if you want great customer service and a quality job done then don’t hesitate to call Knueve & Sons, Inc.!
- Andy M.
Fast Hvac Service
March 20, 2019
HVAC service was fast!! And good communication from Knueve & Sons!
- Brian D.
Very Dependable Hvac Service
February 25, 2019
Knueve & Sons did a good job. They are very dependable.
- George C.
Timely Hvac Service
February 21, 2019
Has always been a great experience. Everything has been done in a timely matter.
- Richard A.
Boiler and Water System Repair
February 21, 2019
Prompt, Friendly, and Professional. Our business has used Knueve & Sons, Inc. for perhaps twelve years. We recently had a problem with our boilers and water system. Knueve always answers our calls and responds quickly. The technicians are very friendly. They are always able to identify and fix our problems. Knueve & Sons, Inc. treats us very well. Excellent service!
- The Meadows of Kalida
Excellent Hvac Work
February 17, 2019
Knueve & Sons does excellent work. Good group of employees.
- Jennifer J.
Reliable Hvac Company
February 11, 2019
Always reliable. Reliable and neat.
- Steve U.
Hvac Unit Installation
January 28, 2019
We chose the right one! We intend to highly recommend Knueve & Sons to anyone who’ll listen. Excellent service, from project estimate to completed installation. We really liked the attention to installation detail. It didn’t go unnoticed.
- David & Connie N.