What does boiler replacement involve in Wilmington?
A new boiler typically costs about $3,200 to $9,000 installed. Gas boilers range about $4,000 to $9,000 and oil boilers about $3,300 to $9,000. Steam systems generally need a steam boiler; hot-water systems can use condensing or combi units. Energize Delaware lists boiler rebates of about $850 to $1,500.
What are the signs you need boiler replacement?
- Leaking cast-iron sections or heat exchanger
- Boiler 25 to 30+ years old
- High oil or gas bills
- Frequent burner repairs
- Want on-demand hot water from the same unit
- Considering heat pumps with boiler backup
How much does boiler replacement cost?
| Boiler type | Typical installed range |
|---|---|
| Average new boiler | $3,200 – $9,000 |
| Standard efficiency | $2,200 – $7,000 |
| High efficiency | $4,000 – $10,000 |
| Gas boiler | $4,000 – $9,000 |
| Oil boiler | $3,300 – $9,000 |
| Old boiler removal and disposal | $200 – $500 |
| Energize Delaware boiler rebate | $850 – $1,500 |
Published U.S. ranges for planning only, not Wilmington quotes. Your written price depends on diagnosis, access, equipment, permits, and timing. Sources: HomeGuide – boiler replacement cost; Energize Delaware – Home Performance rebate pricing (Sep 2025).
Should you repair or replace?
Ask for a radiation survey (measuring the radiators) rather than copying the old boiler size; old boilers are frequently oversized. For hot-water systems, ask whether a condensing boiler can run at lower water temperatures with your radiators.
What should a good service visit include?
- Measure radiation or calculate heat loss
- Choose steam, hot-water, condensing, or combi option
- Plan venting, chimney liner, and fuel line changes
- Commission, skim (steam), and verify every zone
What is different about Wilmington properties?
Large older homes in the Highlands, Wawaset Park, and Westover Hills may have gravity-converted hot-water systems or original steam piping. A replacement should respect that distribution rather than force-fitting modern equipment.
Which brands and equipment are covered?
Replacement boilers are available from Weil-McLain, Burnham, Peerless, Utica, Buderus, Navien, Lochinvar, and Viessmann, among others. Steam homes need a steam-rated boiler; condensing and combi units apply only to hot-water systems. 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
- From Steam Boiler to Heat Pump: What Wilmington Owners Should Plan
- Boiler Making Noise? A Steam and Hot-Water Symptom Guide
- How to Compare HVAC Replacement Proposals Line by Line
- Central Air Versus Ductless for Radiator-Heated Homes
- Oil Heat in Wilmington: Switch to Gas or a Heat Pump?
Where do we take boiler replacement requests?
Requests are accepted across Wilmington and nearby New Castle County communities, and boiler replacement comes up most often in Trolley Square & West-Central, Greenville & Centreville.
