Heat Pump Savings Calculator in Delaware
Compare heat pump and furnace heating costs in Delaware. Uses local climate data (4600 HDD), electricity rates, and fuel prices for accurate savings estimates.
Data last updated July 2026. Sources & methodology
What Delaware Residents Should Know
Delaware falls in IECC climate zone 4A with 4,600 heating degree days per year — near the national average. Modern cold-climate heat pumps achieve an average COP of 2.7 in Delaware's conditions, making them competitive with gas furnaces for most of the heating season.
With natural gas at $1.35 per therm in Delaware, a gas furnace may have lower operating costs in the coldest months. However, heat pumps provide both heating and cooling in one system, which can offset the difference when you factor in AC savings. In shoulder seasons (spring and fall), a heat pump is significantly more efficient, often making the overall annual cost competitive with gas.
A heat pump also replaces your air conditioner, and Delaware's 1,200 cooling degree days make that dual-function value real: one system handles both seasons, so you retire a separate AC unit and its maintenance along with the furnace. For homes with an aging furnace-and-AC pair, replacing both at once is usually where a heat pump makes the strongest financial case in Delaware.
Delaware residents can access up to $12,500 in state rebates and incentives for heat pump installations. With the federal 25C credit having ended December 31, 2025, these state and utility programs are now the primary way to reduce the upfront installation cost, which typically ranges from $4,000 to $8,000 depending on system size and complexity. Run the calculator above with your home details to see your personalized payback estimate.
Avg. Electricity Rate
$0.152/kWh
Avg. monthly bill: $132
Regular Gas Price
$3.15/gal
Natural gas: $1.35/therm
Heating Degree Days
4,600
Cooling: 1,200 CDD
Incentives in Delaware
Federal clean energy tax credits ended in late 2025 under legislation passed in July 2025; they are shown below for reference since recent purchasers may still claim them. State programs are governed separately and many remain active — always verify current details with the program before purchasing.
| Incentive | Type | Amount | Description |
|---|---|---|---|
| Energy Efficient Home Improvement Credit (Heat Pump - 25C)Ended | tax credit | 30% | Federal tax credit of 30% up to $2,000 for qualifying heat pumps. Ended December 31, 2025 — systems placed in service after that date do not qualify. State and utility heat pump rebates remain available in many states. |
| Delaware Green Energy Program Geothermal Grant | grant | $10,000 | DNREC grant of $900 per ton for a residential geothermal (ground-source) heat pump, capped at $10,000, for Delmarva Power customers. |
| Energize Delaware Heat Pump Rebate | rebate | $1,400 | Rebate of up to $1,400 for a qualifying high-efficiency air-source heat pump under Home Performance with ENERGY STAR. |
| Energize Delaware Heat Pump Water Heater Rebate | rebate | $1,100 | Rebate of up to $1,100 for a qualifying heat-pump water heater under Home Performance with ENERGY STAR. |
Heat Pump Savings in Delaware: Frequently Asked Questions
- Are heat pumps worth it in Delaware?
- In Delaware, low natural-gas prices mean a heat pump may not beat a gas furnace on heating cost alone, but its combined heating-and-cooling in one system, plus efficiency in mild months, can still make it the better long-term choice.
- Do heat pumps work in Delaware's climate?
- Delaware sits in IECC climate zone 4A with about 4,600 heating degree days per year. Modern heat pumps there average a heating COP of 2.7, meaning they deliver 2.7 units of heat per unit of electricity.
- Are there heat pump rebates in Delaware?
- Yes. Delaware residents can access Delaware Green Energy Program Geothermal Grant, Energize Delaware Heat Pump Rebate, and Energize Delaware Heat Pump Water Heater Rebate, worth up to $12,500. The federal 25C credit ended December 31, 2025, so these state and utility programs are now the main way to cut installation cost.
Run the Heat Pump Savings Calculator
Use our free calculator pre-filled with Delaware data to see your personalized results.
Open Calculator