Why It Matters: Electrification debates often stall on operating costs where cheap piped gas exists, but delivered fuels carry immediate, compelling margins. For MEP engineers and retrofit contractors, converting oil and propane users to heat pumps delivers $1,200 to $1,600 in net annual utility savings while capturing up to $15,000 in EmPOWER Maryland capital incentives.
While residential electrification economics often face headwinds in regions supplied with low-cost piped natural gas, replacing delivered fuels tells an entirely different story. An analysis published by RMI demonstrates that single-family households in Maryland switching from heating oil and propane to modern electric heat pumps achieve net utility bill savings ranging from $1,200 to $1,600 per year. These operational savings occur across all electric utility service territories in the state, establishing delivered-fuel conversion as one of the most immediate economic opportunities in residential decarbonization.
Delivered Fuel Disparities and Operating Margins
The study, authored by Ashita Gona, Ryan Shea, and Xing Chen, applied localized building energy modeling to evaluate the operational dynamics of swapping combustion systems for ducted air-source heat pumps. In baseline configurations using heating oil or propane furnaces and boilers paired with central or window air conditioning, homeowners face high volumetric fuel delivery costs. When these systems transition to high-efficiency heat pumps, the resulting reduction in delivered fuel purchases substantially outweighs the incremental winter electricity consumption.
Geographic analysis reveals that the greatest absolute dollar savings concentrate in rural and exurban sections of Maryland. The Eastern Shore, served by Choptank Electric Cooperative and Delmarva Power across counties such as Cecil, Caroline, Dorchester, and Queen Anne’s, exhibits some of the strongest household economics. Western Maryland, situated within Potomac Edison territory, shows comparable gains. In both regions, homeowners rely heavily on bulk deliveries of propane and fuel oil, leaving them vulnerable to market price volatility and seasonal supply charges.
Sizing Criteria and Cold Climate Engineering
Technical documentation behind the findings highlights the importance of proper system sizing and specification. The modeled upgrades evaluated ducted air-source heat pumps sized to meet more than 95 percent of annual heating demand, rather than supplemental or dual-fuel arrangements that retain fossil fuel baselines. System specifications varied by climate zone, applying standard high-efficiency units in coastal and central areas while recommending cold-climate heat pump units with staged electric resistance backup in the colder mountainous zones of Western Maryland.
For MEP engineers and HVAC specifiers, this operational data reinforces the necessity of moving beyond older design assumptions. Modern variable-speed inverter-driven compressors maintain capacity at low outdoor ambient temperatures without incurring catastrophic efficiency drops. However, poor load calculations or undersized equipment risk excessive reliance on auxiliary electric resistance heat, which can quickly erode the modeled bill savings during severe cold snaps. Proper equipment selection and ductwork evaluation remain crucial to realizing the projected financial performance.
Incentive Stacking Under State Decarbonization Policy
The operational cost advantages align with significant capital cost incentives currently available across Maryland. Under the Home Performance with ENERGY STAR initiative administered through EmPOWER Maryland, fossil fuel to heat pump retrofits qualify for rebates of up to $15,000. These utility-administered incentives can offset up to 75 percent of total conversion costs for qualifying delivered-fuel customers, dramatically lowering the upfront barrier to entry.
State legislative action has further bolstered the financing landscape. Maryland’s 2026 Utility RELIEF Act directed more than $72 million toward equitable residential energy upgrades while updating the Strategic Energy Investment Fund framework. This dedicated allocation expands consumer access to heat pump technology, particularly for lower-income households and communities that carry high energy burdens from delivered fuel costs.
Policy Priorities for Scaled Adoption
To capture these operational savings at a broader scale, RMI recommends that program administrators intentionally focus EmPOWER incentives on delivered-fuel households rather than treating all fuel conversions identically. Bundling whole-home envelope upgrades, educating HVAC contractors on modern sizing standards, and refining electric utility rate structures will also play essential roles. Electrification-friendly rate design, including seasonal or time-of-use tariffs that shield households from elevated volumetric winter charges, can further solidify long-term savings.
As jurisdictions throughout the Mid-Atlantic balance grid reliability with climate targets, delivered-fuel customers offer a straightforward entry point. By targeting propane and heating oil replacements, contractors and policymakers can deliver substantial greenhouse gas reductions alongside immediate pocketbook relief for homeowners.
What Professionals Should Know
- Switching single-family Maryland homes from heating oil or propane to heat pumps produces $1,200 to $1,600 in annual net energy bill savings across all utility territories.
- The strongest economic gains appear on the Eastern Shore and in Western Maryland, where delivered fuel dependence and winter heating loads are highest.
- Maryland's EmPOWER Home Performance with ENERGY STAR program covers up to 75 percent of project costs with incentives reaching $15,000.
- Systems must be engineered to meet at least 95 percent of annual heating demand to prevent auxiliary electric resistance heat from compromising winter savings.
- The 2026 Utility RELIEF Act added more than $72 million to home energy upgrade programs to expand equitable heat pump deployment.
Sources
- Delivered Fuel Customers in Maryland See Strong Energy Bill Savings in a Switch to Heat Pumps — RMI
- Maryland Heat Pump Memo / Green Upgrade Calculator Technical Documentation — RMI
- Maryland Heat Pump Rebates Summary — EDGE Energy
- Maryland's Utility RELIEF Act Allocates Over $72 Million for Equitable Home Energy Upgrades and Updates SEIF, Expanding Access to Heat Pumps — Building Decarbonization Coalition
