The existing stock of multi-family buildings with gas floor heating is considered one of the more demanding hurdles on the path towards a climate-neutral heat supply. In contrast to properties with a central boiler plant in the basement, heat generation here cannot simply be converted by replacing a component on the lower ground floor. Each residential unit has hitherto supplied its own space heating and domestic hot water independently, and therefore continues to require an individual transfer point alongside separate sub-metering for tenants.
Manufacturer PAW addresses this interface with the HomeBloC GT heat interface unit. Inside the respective flat, the system assumes the function of the previous gas boiler and connects the existing pipework to a central, renewable heat source such as a heat pump. The familiar structure of an independent heat and hot water supply for each residential unit is thus fully preserved from a technical perspective.
Minimal installation effort in occupied buildings
When carrying out refurbishment work while flats are occupied, minimal structural interventions and short installation times are essential. The casing dimensions of the heat interface unit are precisely aligned with the dimensions of standard gas boilers. As a result, qualified contractors can generally reuse the existing pipe connections directly.
Because the units are delivered pre-assembled from the factory, the on-site installation work is restricted to a few steps. This shortens the installation time per flat and noticeably reduces disruption for tenants during the refurbishment phase.
Technical designs for varying flow temperatures
PAW provides the system in two technical versions to accommodate differing operational requirements in multi-storey residential housing:
- —HomeBloC GT: Supplies the existing radiator heating circuit of the flat.
- —Thermostatic domestic water heating: Reliable heating of domestic hot water on the continuous-flow principle via an integrated controller.
- —HomeBloC GT Hybrid + DLE: Supplemented by an instantaneous water heater for domestic hot water production, specifically designed for operation with low flow temperatures.
With this system solution, multi-family buildings with an established individual boiler structure can be converted step-by-step to central heat sources, without relinquishing decentralised billing and control for each individual residential unit.
