How Are All-Electric Commercial Buildings Engineered Today?

All-electric commercial buildings use heat pumps for space heating, heat pump water heaters for domestic hot water, and electric cooking — engineered with low-temperature distribution and right-sized electrical service from the start. The design philosophy differs from gas-era practice in one key way: every thermal system is a heat pump system, and heat pumps reward low-temperature distribution. That means radiant floors, oversized fan coils, and dedicated outdoor air systems handling ventilation separately — the distribution is designed around the heat pump's happy operating range rather than the boiler temperatures of the past. Get the distribution right and the whole building sings; force heat pumps onto high-temperature distribution and efficiency suffers.

There's no single all-electric template — the right heat pump architecture depends on the building. Offices and schools suit VRF with heat recovery or central air-to-water heat pumps with hydronic distribution. Multifamily works well with central heat pump plants or distributed unitary heat pumps. Buildings with simultaneous heating and cooling — hotels, hospitals — are ideal for heat recovery chillers that make hot and chilled water at once, essentially getting one side free. Cold climates push toward geothermal or cold-climate air-source equipment with supplemental strategies for design days. The domestic hot water strategy deserves early attention because it's often the last system designed and the first to cause trouble — central heat pump water heating with storage, sized to the building's actual draw profile, beats a collection of afterthought units every time.

All-electric design succeeds on load reduction first — the smaller the loads, the smaller the electrical service, the batteries, and the bills. Then it's about heat pump-friendly distribution and honest load calculations. The design priorities.

• Drive loads down first — envelope, lighting, and ventilation efficiency shrink everything downstream
• Design distribution for heat pump temperatures — radiant, oversized coils, decoupled ventilation
• Size domestic hot water from actual draw profiles with storage matched to heat pump recovery rates
• Calculate the electrical service with realistic diversity — stacked nameplates oversize everything
• Plan backup power and resilience explicitly — all-electric means no fossil fallback