An electrification study should define the owner’s decision, existing loads, service and distribution limits, system options, operating effects, phasing, and the work still required for design.
Begin with the decision ownership needs to make
The study should state whether the owner is evaluating full electrification, one end use, a replacement triggered by equipment failure, a capital-plan option, a compliance pathway, a utility or incentive opportunity, or a phased portfolio strategy. Space heating, cooling, domestic hot water, kitchens, process loads, emergency systems, and tenant equipment create different technical and operational questions.
Define the property, buildings, uses, occupancy, operating schedule, hold period, target decision date, desired outcomes, systems included, systems excluded, and the level of cost and schedule development expected. A screening study can compare plausible pathways; it should not be presented as completed engineering design or a guarantee of utility capacity, performance, incentive eligibility, or construction cost.
Establish the building and load baseline
Document existing HVAC and domestic-hot-water systems, fuels, capacities, condition, age, control sequences, distribution temperatures, ventilation, zones, redundancy, maintenance, failures, comfort complaints, seasonal operation, utility use, interval data where available, and planned replacement work. Separate nameplate capacity from actual demand and distinguish whole-building consumption from the load shape that determines electrical and thermal peaks.
The enclosure and internal loads matter because they influence heating and cooling demand. Air leakage, insulation, glazing, solar exposure, ventilation, heat recovery, schedules, plug loads, lighting, occupancy, and simultaneous uses can change equipment size and peak demand. Efficiency or envelope work may reduce the capacity, distribution, and utility upgrades required for an electrification pathway.
Trace electrical capacity to the point of connection
DOE guidance for heat-pump retrofits distinguishes building utility-service capacity from capacity at the point of interconnection. A building may have apparent room at the main service while the panel, feeder, transformer, riser, switchgear, or pathway closest to the proposed equipment cannot accept the new load.
Review service information, utility records, one-line diagrams, transformers, switchgear, panels, feeders, available breaker positions, conductor and raceway paths, fault-current implications, metering, emergency and standby systems, tenant distribution, space, and condition. Load calculations and measured demand each have uses and limitations; short-term metering may not capture seasonal peaks, and whole-building interval data may not answer a downstream-panel question. The electrical engineer and utility should be engaged at the level required for the decision.
Test system options against the building
Candidate pathways may include air-source, water-source, ground-source, packaged, variable-refrigerant, central hydronic, heat-recovery, hybrid, or staged systems and separate strategies for domestic hot water. The assessment should examine climate performance, supply temperatures, terminal equipment, distribution, heat rejection, ventilation, condensate, defrost, refrigerant management, controls, acoustics, structural loads, roof or site area, shafts, louvers, equipment rooms, maintenance access, and replacement logistics.
Existing steam or high-temperature hot-water distribution may not perform as intended at lower heat-pump supply temperatures without terminal, envelope, or system changes. Backup and redundancy should be described as operational strategies with load and control implications—not added automatically until the electric infrastructure becomes the unexamined constraint.
Make occupied-building phasing part of feasibility
A technically plausible end state may still be difficult to deliver around residents, tenants, guests, patients, students, or ongoing operations. The study should identify shutdowns, temporary heat or hot water, seasonal work windows, unit or tenant access, roof and crane logistics, hazardous-material review, noise, temporary power, fire and life-safety interfaces, space restoration, commissioning, training, and the sequence for retiring existing systems.
Phasing can also shape the permanent system. Owners may align work with apartment turnover, tenant projects, roof replacement, façade or envelope work, electrical upgrades, major equipment renewal, or utility construction. A useful study distinguishes enabling projects, early actions that preserve future options, stranded-work risk, and the conditions that must be met before each phase proceeds.
Compare pathways as capital and operating decisions
Each feasible scenario should identify included scope, enabling work, remaining engineering, utility coordination, approvals, schedule, procurement, incentives to be confirmed, planning-level capital cost, potential rate or demand-charge effects, maintenance changes, emissions or compliance implications, useful life, operational risks, and material assumptions. Sensitivity to weather, rates, load growth, and phased implementation may matter more than a single modeled payback.
The recommended next step can be targeted metering, load calculation, utility application, controls investigation, envelope testing, design, incentive study, pilot installation, or a combined capital project. Feasibility is successful when it narrows the owner’s decision and exposes dependencies early—before one preferred system hardens into design without the building, utility, budget, and operating plan behind it.
Primary sources
Sources and technical references.
Source review current as of September 1, 2026.