Joseph Frederick & Sons
✓ VerifiedWilmington, DE 19801
Joseph Frederick & Sons is a verified HVAC contractor based in Wilmington, DE. They hold a 4.7/5 Google rating from 157 reviews. Services include installation, furnace, heat pump, maintenance, air quality, plumbing, water heater, generator. Certifications: NATE.
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Verified via Google
Customer Ratings
4.7
157 reviews
Based on 157 verified Google reviews. This contractor is among the highest rated in their area.
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Verified Google Reviews
Customer Reviews
Excellent service from first inspection and estimates to the actual appliance installation. Gabe Thomas was skilled, polite and friendly. His plumbing installation was top-notch using the latest technology. Our new water heater has worked flawlessly the past week. I trust Jos Frederick & Sons to...
7 months ago
Dave went the extra mile in providing multiple options for our furnace and A/C replacement. The install crew - Jake, Jake, and Omar - were among the most knowledgeable and well-trained techs I have dealt with. Everything installed professionally and right the first time. Highly recommended.
3 months ago
Gabriel was professional, had clear communication and is highly competent. We had an issue that he quickly assessed and provided options. He performed his service and all works as expected. We were especially thankful he was willing to take our video call to discuss! Excellent technician! We were th...
6 months ago
Until the service call last week, I heartily recommended this company. I can no longer be a supporter. The tech was nice, but came without the necessary adapter to check the refrigerant level in my two compressors. He used my hose, but broke off the water flow meter attached to it - and did not tell...
7 months ago
Came out same day and installed a hot water heater. Great/ professional service. Would go with them again in a heartbeat
2 months ago
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Claim Referral OfferBusiness Hours
Monday: 7:30 AM – 4:30 PM
Tuesday: 7:30 AM – 4:30 PM
Wednesday: 7:30 AM – 4:30 PM
Thursday: 7:30 AM – 4:30 PM
Friday: 7:30 AM – 4:30 PM
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Data last verified: 2026-04-06