Joseph Frederick & Sons
Wilmington, DE HVAC · 75+ yrs
Joseph Frederick & Sons as a HVAC provider
Wilmington, DE HVAC · 75+ yrs
Joseph Frederick & Sons lists ductless systems and mini-split services on its website. The company reports 75+ years in business. Joseph Frederick & Sons lists Aprilaire and dehumidifiers among IAQ products. The website notes financing options for larger replacements. Reviews mention punctual technicians who respect customers' properties.
Full-service HVAC company specializing in installations, repairs, and ductless mini-split systems in Wilmington. Products list names Carrier and Aprilaire equipment on the company website. Company reports 75+ years in business.
- High Google rating (4.7★ across 170+ reviews)
- Long-established (75+ years in business)
- Financing available
- Indoor air quality services
- Mini-split system specialist
- You need indoor air quality work
- You need to finance the work
- You value a long-tenured local operator (75+ years in business)
| Provider | Vouched | Years | BBB | Yelp | Our picks | |
|---|---|---|---|---|---|---|
Joseph Frederick & Sons (this company) |
72/100 | 4.7★ (170+) | 75+ | — | — | Mini-Splits / Ductless |
| 80/100 | 4.7★ (7,160+) | — | — | — | Best Labor Warranty |
Company-wide signals
True across every category below.
Joseph Frederick & Sons traces 75+ years serving the Delaware Valley. The company lists ductless installation and repair services. Financing is available, per their website. Wilmington's coastal humidity makes efficient cooling important for local installs. Reviews note quick turnaround and respectful, property-conscious crews.
Ventilation focus: lists ERV/HRV ventilation among IAQ offerings. Carrier and Aprilaire appear on their product pages. Joseph Frederick & Sons reports 75+ years in business, fourth-generation family ownership. Wilmington's coastal humidity makes dehumidification and humidity control relevant. Recent customer comments note timely scheduling and respectful technicians.
AC repair specialization appears strongest, with refrigerant leak and recharge listed. The company reports over 75+ years in business. Joseph Frederick & Sons lists Carrier among its HVAC product brands. The site notes a Comfort Care membership maintenance plan. Wilmington summers bring high humidity, making timely leak repair critical here.
Choose them for AC Repair if
- You need AC tune-up & maintenance
- You need AC refrigerant leak repair
Joseph Frederick & Sons lists central AC replacement and system installs on their service pages. The company notes Carrier among its product brands. Joseph Frederick & Sons traces a 75+ year, fourth-generation family history. Wilmington's humid summers increase dehumidification needs, which sizing guidance on their site addresses. Review snippets note quick turnaround and respectful property care.
Joseph Frederick & Sons notes heating services for gas and oil furnaces. The company lists over 75+ years in business. Wilmington winters often demand fast heat restoration; local crews know regional heating issues. Online reviews mention quick turnarounds and courteous, property-respectful technicians.
Choose them for Furnace Repair if
- You need gas furnace & combustion repair
- You need furnace tune-up & maintenance
- You need oil furnace & burner repair
Joseph Frederick & Sons lists ducted heat pump installation and hybrid dual-fuel systems.
Furnace replacement work lists gas-furnace installs and oil-to-gas conversions. Joseph Frederick & Sons traces operations back over 75 years. The company lists financing options on its website. Wilmington winters increase heating demand and emphasize combustion safety checks.
What customers say
Services
- AC Repair — Diagnostics and repair of central air conditioning systems — refrigerant leaks, capacitor and contactor failures, condenser fan motors, and thermostat issues.
- AC Replacement — Removal and replacement of an aging or failed central A/C — typically condenser, evaporator coil, and refrigerant lines.
- HVAC Installation — Full HVAC system installation including indoor and outdoor equipment, ductwork tie-in, and refrigerant work.
- Mini-Split Systems — Mini-split installation and service — typically ductless, used for additions or zoned comfort.
- Indoor Air Quality — Indoor air-quality work: high-MERV filtration, UV systems, humidifiers/dehumidifiers, and duct sanitization.
- Duct Work — Ductwork inspection, sealing, and replacement — addresses leakage, undersized runs, and uneven room temperatures.
Service area
Published pricing
100% SATISFACTION GUARANTEED RESPECT FOR YOUR TIME DONE RIGHT FROM THE START WE REPAIR AND SERVICE ALL BRANDS OUR LATEST NEWS How to Determine the Perfect AC Size for Your Newark, DE, Home Ever feel like Goldilocks when it comes to being comfortable at home? Always feeling too hot or too cold and never just right? The cause may surprise you: the size of your air conditioner. Choosing the right air conditioner isn’t just about brand or features—it’s also about size. And no, we’re not talking abou
Guarantees & credentials
- SATISFACTION GUARANTEED
Sourced from the provider's own website. We surface these as published; we do not independently verify each license or warranty.
Contact & hours
Frequently asked questions
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Does Joseph Frederick & Sons do Mini-Split Systems in Wilmington, DE?
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Profile last updated July 25, 2026.