3,500 Sq Ft Heating & Cooling Cost in Delaware (2026)

Recommended HVAC Capacity: 5.0 Tons (60,000 BTU)  |  Utility Rate: 19.3¢/kWh (Delmarva Power)

2026 Monthly & Annual Utility Breakdown (3,500 Sq Ft in Delaware)

Recommended Equipment Size:5.0 Tons (60,000 BTU)
Delaware Residential Electricity / Gas Rate:19.3¢/kWh  |  $1.6/therm
Cold-Climate Heat Pump (15-Yr Lifespan):$1,371/yr ($114/mo)
Winter Heating vs. Summer Cooling Split (Heat Pump):$1,207/yr Heat  |  $164/yr AC
Natural Gas Furnace + Central AC (18-Yr Lifespan):$1,347/yr ($112/mo)
Electric Baseboard + Window AC (25-Yr Lifespan):$4,037/yr ($336/mo)
15-Year Heat Pump Lifespan Net Savings vs. Baseboard:+$36,390
Customize Insulation, Solar & View 20-Year Lifespan Graph →
🛠️ Save 45% on Install

DIY Pre-Charged Ductless Mini-Split Kits

Avoid $3,500+ in ductwork labor. Calculate exact multi-zone mini-split BTU capacity for your 3,500 sq ft Delaware home.

Size DIY Mini-Split Kit →
☀️ Offset 19.3¢/kWh

Delaware Solar + Heat Pump Net-Zero Calculator

See how an 80%–100% rooftop solar net-metering array eliminates annual electric heating and cooling bills in Delaware.

Model Solar + Heat Pump ROI →

Compare Other Home Sizes in Delaware