What does furnace installation involve in Wilmington?
A new standard-efficiency furnace typically costs about $3,500 to $7,500 installed, and high-efficiency units run up to about $11,500. Gas furnaces range about $3,800 to $12,000 and oil furnaces about $4,000 to $10,000+. Energize Delaware lists furnace rebates of roughly $350 to $1,100 through its Home Performance program.
What are the signs you need furnace installation?
- Furnace is 18 to 20+ years old
- Cracked heat exchanger
- Repeated repairs each winter
- Uneven heat or dry, dusty air
- Adding central AC or a heat pump
- Switching from oil to gas
How much does furnace installation cost?
| Furnace type | Typical installed range |
|---|---|
| Standard-efficiency furnace | $3,500 – $7,500+ |
| High-efficiency furnace | up to $11,500 |
| Gas furnace | $3,800 – $12,000 |
| Oil furnace | $4,000 – $10,000+ |
| Electric furnace | $2,500 – $7,000+ |
| Energize Delaware furnace rebate | $350 – $1,100 |
Published U.S. ranges for planning only, not Wilmington quotes. Your written price depends on diagnosis, access, equipment, permits, and timing. Sources: HomeGuide – new furnace cost; Energize Delaware – Home Performance rebate pricing (Sep 2025).
Should you repair or replace?
Ask the provider to compare a high-efficiency gas furnace, a hybrid (heat pump plus furnace backup), and an all-electric heat pump. Hybrids let the heat pump run most of the season while gas covers the coldest nights.
What should a good service visit include?
- Perform a heat-loss calculation
- Inspect venting, gas line, and ductwork
- Compare 80%, 95%+, and hybrid options with total costs
- Install, test combustion and static pressure, register warranty
What is different about Wilmington properties?
A switch from an 80% to a 95%+ furnace needs PVC venting through a side wall or roof, which can be tricky in attached homes with narrow side yards. If the water heater still uses the chimney, it may need a liner once the furnace no longer shares the flue.
Which brands and equipment are covered?
Common furnace lines include Carrier, Bryant, Trane, American Standard, Lennox, Goodman, Amana, Rheem, Ruud, and York. High-efficiency models from most brands vent through PVC, so venting routes should be part of the quote. See all brands and common issues.
Ask the responding provider for identity, applicable Delaware license information, a written diagnosis or scope, total price, and warranty terms.
Related guides
- Do Heat Pumps Work Well in Wilmington, Delaware?
- HVAC Rebates and Incentives in Delaware (2026)
- Furnace Repair Cost in Wilmington: What Changes the Quote
- How to Compare HVAC Replacement Proposals Line by Line
- HVAC Permits in Wilmington: A Homeowner Checklist
- Delaware HVAC License Lookup: How to Verify a Provider
Where do we take furnace installation requests?
Requests are accepted across Wilmington and nearby New Castle County communities, and furnace installation comes up most often in Brandywine Hundred, Newport, Stanton & Prices Corner, New Castle & Wilmington Manor.
