Hentkowski: Trusted HVAC & Electrical Services in Wilmington DE
Serving Wilmington DE and surrounding communities since 1968, Hentkowski is a family-owned provider of heating, cooling, electrical, and water heater services. The company operates 24/7, offering emergency support for both residential and light commercial clients across New Castle County.
Business Overview
Hentkowski brings over five decades of experience to Wilmington DE homes and businesses. Their team of NATE-certified technicians handles everything from routine maintenance to emergency repairs. With round-the-clock availability, they respond quickly when systems fail during Delaware's humid summers or chilly winters.
The company serves residential properties and light commercial establishments throughout the region. Their deep local knowledge helps them address common issues in older Wilmington homes and newer constructions alike.
Key Services
Hentkowski provides a full range of climate control and electrical solutions:
- HVAC Services: Installation, replacement, repair, and maintenance of heating and cooling systems
- Electrical Work: Inspections, installations, panel upgrades, and repairs
- Generator Services: Installation and repair of backup power systems
- Water Heaters: Installation and repair for tank and tankless models
Areas Served
Hentkowski serves communities throughout New Castle County including Wilmington DE, Newark, Bear, Brookside, Hockessin, Pike Creek, North Star, Wilmington Manor, Greenville, Delaware City, and Saint Georges.
Company History
John W. Hentkowski founded the business on January 1, 1968, as a residential heating and cooling company. Now led by his wife Marilyn and their children Barbara, John Jr., and Stephen, the business remains family-operated while expanding into electrical services and light commercial work.
The company earned the 2013 Reader's Choice Award for Heating & Cooling and multiple Carrier President's Awards recognizing leadership and customer satisfaction.
Leadership & Community Involvement
The Hentkowski family maintains strong ties to the Wilmington DE area. They participate in advisory committees for Chester County Technical High School and Cecil County School of Technology, helping educate local youth in skilled trades.
This commitment to community development reflects their belief in supporting the region that has supported their business for generations.
Specialties & Highlights
- First Carrier Factory Authorized Dealer in Delaware
- Multiple Carrier President's Award winner
- NATE-certified technicians with ongoing training
- 24/7 emergency service availability
- Family-owned and operated since 1968
Why Locals Choose Hentkowski
Wilmington DE residents trust Hentkowski for their consistent quality and reliable service. Their long presence in the community means they understand local housing styles and climate challenges. The company's focus on proper workmanship and customer service has built a reputation that keeps generations of homeowners coming back.
When HVAC or electrical issues arise, Hentkowski provides the experienced, local service that Wilmington DE customers have depended on for over 50 years.
Contact Information
Hentkowski
: 3420 Old Capitol Trl, Wilmington, DE 19808
Business Services
- Electric inspection
- Electric installation or replacement
- Electric panel installation
- Electric repair
- Generator installation
- Generator repair
- HVAC installation or replacement
- HVAC system repair
- HVAC system maintenance
- Water heater installation
- Water heater repair
Business Location & Hours
| Mon: | Open 24 hours |
| Tue: | Open 24 hours |
| Wed: | Open 24 hours |
| Thu: | Open 24 hours |
| Fri: | Open 24 hours |
| Sat: | Open 24 hours |
| Sun: | Open 24 hours |







