Commercial heat pump financing: the “Heat Pump as a Service” model.

1. What Heat Pump as a Service actually is

HPaaS is a service contract wrapped around a piece of physical equipment. Instead of buying the heat pump, the building owner signs a multi-year agreement under which a service provider — or a financing partner behind that provider — owns the system, installs it, keeps it running, and delivers heating and cooling (and sometimes hot water) as a metered service. Payment structures vary: some are flat monthly subscription fees, some are billed per unit of heat delivered, and some are indexed to measured or modeled energy savings against a prior baseline. The International Renewable Energy Agency describes this as “heating and cooling as a service,” noting that the model “removes the requirement for up-front capital investment” and shifts long-term operating risk from the owner to the provider (IRENA).

The clearest mental model: you paid your last capital dollar the day you signed. Equipment, ductwork or piping changes, controls, commissioning, refrigerant handling, and every service call for the next 10 to 20 years belong to the provider, not the property. In exchange, the building takes on a long-dated operating expense — and, in most contract forms, gives up direct claim on federal tax credits and utility rebates, which the lessor typically monetizes and prices into the monthly fee. DOE’s Better Buildings program stresses that this is a category of approach, not a single template: contracts range from equipment-lease structures to full pay-for-performance agreements where the customer only pays if measured savings are delivered (DOE Better Buildings, “At Your Service” program transcript).

Key idea: HPaaS replaces a capital purchase with a long-term service subscription. The provider owns, installs, operates, and maintains the equipment; the building pays a periodic fee.

2. Where this model has real value

HPaaS isn’t universally the right answer — a well-capitalized owner with cheap access to debt, control of the meters, and a strong appetite for equipment ownership will usually do better buying the system outright. The model earns its keep in a specific set of building conditions, most of which cluster in multifamily and mid-size commercial portfolios. The Department of Energy’s “At Your Service” program work highlights five conditions that consistently push owners toward a service model rather than a capital purchase (DOE Better Buildings program transcript):

• Capital-constrained owners. Non-profits, affordable-housing operators, and municipalities that operate under statutory or covenant-level debt limits can rarely absorb a full-building heat pump conversion out of the capital budget. Moving that cost to opex — and to a third-party balance sheet — lets a project happen that wouldn’t otherwise pencil.
• Aging equipment near end-of-life. Boilers, chillers, and rooftop units in the 30–50-year age band are prime replacement candidates. HPaaS lets the retrofit happen on the provider’s schedule, not the owner’s next major recap.
• Master-metered or owner-paid utilities. The economics only work cleanly when the entity paying the service fee also captures the resulting utility-bill savings. A split-incentive building — where the owner replaces equipment but tenants pay the bill — is a much harder fit unless the contract structure explicitly bridges that gap.
• Older buildings with regulatory or climate pressure. Cities with building performance standards (New York’s Local Law 97, Boston’s BERDO, Washington D.C.’s BEPS, and similar) turn slow-moving decarbonization into a hard deadline. HPaaS offers a path to compliance without a capital ask.
• Portfolio-scale owners who prize predictability. A REIT or affordable-housing portfolio with dozens of similar buildings values the standardization: identical contracts, identical service response, a single vendor accountable for uptime.

None of these conditions guarantee that HPaaS is cheaper than owning outright — a long-lived monthly payment that bundles equipment, install, financing, incentives, and maintenance is not free money, and providers earn a margin on every layer. The right question is whether the building could realistically buy this equipment at all, and whether the alternative is a decade of deferred action.

3. The primary players currently in the market

Despite considerable industry chatter about HPaaS, the list of firms actually offering a bundled heat-pump-as-a-service product to multifamily and commercial owners in 2026 is short. Four names come up most often in industry press — Tetra, Palmetto, Breeze Lease Purchase, and BlocPower — but on close inspection only BlocPower’s current stated offering serves commercial and multifamily buildings. Tetra and Palmetto (which are the same underlying product) and Breeze are residential-only; those three are covered in the residential heat-pump financing companion piece. That leaves BlocPower as the only genuinely commercial-facing player in the group — and its current status is complicated enough to warrant careful reading before treating it as an off-the-shelf option.

A. BlocPower

BlocPower is a Brooklyn-based climate-technology and financing company founded in 2014 with the stated mission of using data analytics, financing, and a workforce-development arm to accelerate building electrification in low-income and disinvested communities. Its services page states that BlocPower provides financing for retrofits “including but not limited to single-family, multifamily, and commercial properties” — making it the only provider in this comparison whose current, live scope explicitly includes commercial and multifamily buildings (BlocPower services).

The mechanics of BlocPower’s service model are described most concretely on its subsidiary crowdfunding page, which frames the offer as “no-money-down system leasing…covering all maintenance and repairs” for the life of the lease (BlocPower Energy Services III crowdfunding page). Trade press coverage adds detail that has not been re-stated on the current main services page: BlocPower has historically structured 15- to 20-year leases where the monthly lease payment is designed to sit below the projected reduction in the building’s utility bill, and it has explored pooling those receivables into asset-backed securities to unlock scale financing (Latitude Media). Building owners in this structure do not typically claim the federal tax credits or utility rebates directly — those flow to BlocPower (or its financing partner) as the equipment owner and are built into the monthly payment.

BlocPower has also operated a workforce arm that received notable public attention. In late 2021, BlocPower launched a Civilian Climate Corps under a $37 million contract with the New York City Mayor’s Office of Criminal Justice; PRNewswire coverage a year later reported that the program had trained more than 1,700 New Yorkers and placed over 400 into green-economy jobs, operating from hubs in Bedford-Stuyvesant and the South Bronx (PRNewswire, 2022). A subsequent 2023 announcement referenced a $108 million two-year contract expansion tied to the Corps (PRNewswire, 2023). BlocPower’s current public pages do not name the Civilian Climate Corps — any reference to it should be treated as historical rather than a live program.

B. Tetra, Palmetto, and Breeze — residential only

Two of the four commonly-cited HPaaS names collapse into a single product: Tetra’s public leasing page states that its heat-pump leases are “owned and financed by Palmetto” — Palmetto is the balance-sheet counter-party and Tetra is the installation and service arm on the ground (Tetra leasing). Palmetto’s Comfort Plan is a residential-only subscription for HVAC systems in single-family homes (Palmetto Comfort Plan), and Tetra’s own FAQ limits service to residential buildings of four units or fewer in Massachusetts, New York, and Georgia (Tetra FAQ).

Breeze Lease Purchase, offered by Okinus Credit Solutions, is a residential lease-to-own program with instant approvals of $9,000–$18,000 for HVAC and heat-pump purchases — not a service subscription (Breeze Lease Purchase). Ongoing maintenance and repairs are not bundled, and installation is performed by third-party contractors that the customer selects from Breeze’s referral network (Breeze consumer information). Because Breeze is fundamentally a credit-access product rather than an equipment-service bundle, it belongs in the residential financing conversation rather than a commercial HPaaS comparison.

All three are covered in the Residential Heat Pump Financing piece, which treats them as three different answers to the same residential problem: buying a heat pump when you don’t want to write a check for one up front.

What the four models actually cover

Bottom line

Heat Pump as a Service is a real and useful contract structure for exactly the kind of building where the alternative is another decade of a 40-year-old boiler and no capital budget to replace it. It works best when the same entity signs the service contract, pays the utility bill, and has enough of a portfolio to make standardized long-term contracts worthwhile. Right now, the list of firms actually delivering that offering to commercial and multifamily buildings comes down to BlocPower, and BlocPower’s corporate status in 2026 is enough of a moving target that due diligence on the counter-party has to happen before due diligence on the equipment.

For a broader look at how full-building energy service contracts are structured and priced — and how they differ from the narrower heat-pump-only case here — see the Energy as a Service piece. The two models overlap in language and diverge sharply in what the customer actually buys, and they’re worth reading together.