The installed system used six 16-panel PVT arrays with two Thermal Tanks per array, totaling 96 panels and 12 tanks on the flat roof. The project’s nameplate thermal capacity was 60 kW thermal, with maximum tank thermal capacity of 660 kWh at a 95°F temperature differential. A glycol loop connected the rooftop equipment to the basement system, where the stored thermal energy was used to preheat the centralized boiler system.

The case study notes that the primary deployment motivation was achieving the building decarbonization threshold needed to access green financing through the SBA. Interest rate advantages tied to that financing pathway were not included in the project’s financial analysis, meaning the stated financial case understates the full business value of the installation.

The project summary states annual thermal capacity of 54,000 kWh, covering 42 percent of building thermal demand. The financial table shows energy quantities dropping from 131,000 kWh to 77,000 kWh, yielding 54,000 kWh in savings and $2,532 in annual cost reduction. Total project cost was listed at $129,600, with $48,000 in available incentives reducing net project cost to $81,000. The case study also reports 17.15 tons of GHG avoidance and 25-year savings of $57,000. The system has operated continuously since 2019 with minimal maintenance.

Cleveland Lofts demonstrates how rooftop PVT and thermal storage can materially reduce thermal demand, support financing-driven decarbonization goals, and integrate with existing centralized boiler infrastructure.