Heat Pump Panel Check — Maryland

In Maryland, a whole-home air-source heat pump typically costs $5,000–$14,000 installed, depending on home size, system type, and contractor. Cold-climate models for zones like Zone 4A cost more but deliver lower operating costs. Combined rebates of up to $9,300 (HEEHRA + state programs) can offset a significant portion of installed cost.

Yes — Maryland has launched its HEEHRA program. Income-qualified households (under 80% AMI) can receive up to $8,000 for a qualifying heat pump. Moderate-income households (80–150% AMI) may receive up to $4,000. HEEHRA program is active and accepting applications as of March 2026. Maryland homeowners with income ≤ 150% AMI are eligible for rebates up to $8,000 for heat pumps. Administered through the Maryland Energy Administration. Contact them directly for current availability.

Maryland falls in IECC 2021 Zone 4A — Mixed-Humid. Typical winter design temperatures are 10°F to 22°F. Cold-climate heat pumps (rated to -13°F) are recommended for primary heating. Standard units lose efficiency below 20°F. Sizing requires a Manual J load calculation — but as a rough rule, allow 20–30 BTU/h per square foot for older homes in Maryland.

Not necessarily. Most 200A panels in Maryland have headroom for a heat pump under the NEC 220.82 Optional Method — which accounts for diversity of loads rather than peak simultaneous demand. A 100A panel is more likely to require an upgrade, especially if you also have an EV charger or electric range. Our free audit calculates your exact available capacity in 3 minutes using the same method your electrician would use.