One Hour Heating & Air Conditioning

4.62 | 61 Verified Ratings
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410 Meco Drive
Wilmington, DE 19804
Your use of our services is governed by our Terms & Conditions

One Hour Heating & Air Conditioning

Call the company that your neighbors in Newark, DE trust for comfort, heating, air conditioning, and duct sealing. One Hour Heating and Air Conditioning is ready to take care of all your HVAC needs including installation, repair, replacement, and maintenance. our home's heating and air conditioning systems keep you comfortable but you really only notice them when something goes wrong. At One Hour Heating & Air Conditioning, we know that every home owner and every home itself is different. We offer 24-hour emergency service, with no overtime charges. Our fully stocked trucks with thousands of specialty parts and materials on board are ready to serve you and fix your heating or air conditioner problem on the first call. And when your family's health, safety, and comfort are involved, that means peace of mind. Quality service is important to our clients, and our goal is to ensure that your needs are met when heating or air conditioning issues that arise. We offer financing!


Service Area

  • Wilmington
  • Newark
  • Dover
  • New Castle
  • Kirkwood
  • Port Penn
  • Viola
  • Frederica
  • Felton
  • Townsend
  • Winterthur
  • Hartly
  • Middletown
  • Hockessin
  • Saint Georges
  • Camden Wyoming
  • Woodside
  • Kenton
  • Smyrna
  • Clayton
  • Bear
  • Claymont
  • Odessa
  • Dover AFB
  • Yorklyn
  • Cheswold
  • Delaware City
  • Rockland
  • Magnolia
  • Marydel
  • Montchanin
  • See All >

Services Offered

Air Conditioning
  • Central A/C Install
  • Central Humidifier Install
  • Central Humidifier Repair
Heating & Furnace Systems
  • Thermostat Repair
  • Heat Pump Install
  • Heat Pump Repair
  • Geothermal Heating or Cooling Install
  • Geothermal Heating or Cooling Service
  • Radiant Floor Heat Install
  • Radiant Floor Heat Repair
  • Radiant Panel Heat Repair
  • Ducts & Vents Install
  • Gas Furnace - Repair
  • Gas Boiler or Radiator Heat Install
  • Electric Furnace - Repair
  • Oil Furnace - Repair
  • Electric Furnace - Install
  • Oil Furnace - Install
  • Oil Boiler or Radiator Heat Repair

Areas of Expertise

  • Central Air Conditioning Replacements / Repairs
  • Gas Furnace Replacements and Repairs
  • Heat Pump Replacements / Repairs
  • Boiler Replacements and Repairs
  • Duct and Vent Replacements / Repairs and Duct Cleaning

Quick Facts

Business Hours
(Please call to confirm)
  • Free Estimates
  • Trip Charge
  • Credit Cards Accepted
  • Bilingual


In Business Since: 1991
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Ratings & Reviews
One Hour Heating & Air Conditioning

Real feedback from real homeowners.
Learn more about this pro by reading the ratings and reviews below.
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Showing 1-10 of 61
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5.0   |  
Review by in Newark, DE
Their Comfort Advisor Kevin was very pleasant and professional. The techs were on time, very professional, clean and thorough. They completed the job earlier than expected. I would gladly recommend Calvert. By the way they were $4000 cheaper than an earlier quote.
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5.0   |  
Review by in Dover, DE
very professional, clean and got the job done.
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5.0   |  
Review by in Townsend, DE
Project: Repair Natural Gas or Propane Furnace / Forced Air Heating System
Hai was punctual and very personable
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5.0   |  
Review by in Wilmington, DE
Very satisfied
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4.0   |  
Review by in Wilmington, DE

0 of 1 users found this review helpful.

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5.0   |  
Review by in New Castle, DE
We commend Calvert for their customer service, technical experise, and for their professionism. After speaking with their very competent and nice service representative, they insalled our new air conditioner with ease and competency. Thank you Calvert/One Hour, we plan to deal with you for our HVAC needs in the future.
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5.0   |  
Review by in Wilmington, DE
Highly recommend for installation of ductless mini-splits. I appreciated that every person from sales to technical HVAC installers were very responsive, professional, on time, friendly, and willing to answer any and all questions. The price of ductless mini-splits is very high so I'm still having a bit of "sticker shock"; however, pricewise, One Hour/Calvert was in the same ballpark as another major installer. And, even though One Hour was slightly higher priced, I got the impression they had carefully assessed the specific needs of our house and were not trying to provide a "one-size fits all" solution. They were clear and specific about the details of installation. The 2 technical workers who actually did the installation were terrific. They were incredibly fast and diligent workers and seemed to know exactly what they were doing. They were extremely patient with numerous questions and a few of our special requests. They double checked before making final installations to be sure we agreed with everything. They were very respectful of being neat. I would have rated One Hour with all 5 stars but I think there was a slight misunderstanding between the sales person, the owner, and technical guys as to where one of the mini-splits was to be placed (where we wanted it and discussed with sales versus what was technically possible). This was where we felt we "slipped through the cracks" a bit. They did bring out another manager to assess the situation and a reasonable solution was found. Overall, I definitely recommend.
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5.0   |  
Review by in Newark, DE
Project: Install Natural Gas or Propane Furnace / Forced Air Heating System
We found Calvert to be very professional and knowledgeable. We had never dealt with them before but we were very impressed with the people that we had contact with. We checked references and this helped us make our decision. There was one minor glitch and this was taken care of promptly and very efficiently. We would definitely use them again and recommend them to others.
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5.0   |  
Review by in Wilmington, DE
Project: Install Natural Gas or Propane Furnace / Forced Air Heating System
I have a 40 year old house and was replacing an oil burner with a heat pump. I was very concerned that the existing ductwork not serve a new heat pump as efficiently as needed. When the heat pump was installed, it didn't take long to realize the ductwork was an issue. For an additional charge, the ductwork was redone. It took a couple of additional service calls, but I now think I have a system I can live with. There were a lot of issues that came up after the install and Calvert was willing and responsive to fix them. I am glad I went with a company that would go the extra mile to make sure I was happy. It is a huge investment.

0 of 1 users found this review helpful.

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5.0   |  
Review by in New Castle, DE
Project: Repair Natural Gas or Propane Furnace / Forced Air Heating System
I couldn't believe that someone came out that same night I reported that we had a problem. Wade has a great personality, very professional and even showed my husband what to do if the problem reoccured. Wade stated that it (the problem) may never occur again. He was here over 2 hrs. The price we were given prior to Wade coming to our home, was exactly what they said it would be. Thanks so much!!

1 of 1 users found this review helpful.

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Showing 1-10 of 61
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