Private Residential Villa — Full Electrification of Heating and Domestic Hot Water
In residential projects, efficiency alone does not define a successful system. The equipment operates within an occupied home, where noise, space requirements, control, maintenance access, and installation quality directly affect the user’s everyday experience.
For this project, a hydronic architecture was adopted instead of distributing refrigerant throughout the house. A group of outdoor MAXA air-source heat pumps supplies a central thermal buffer, from which underfloor heating circuits are distributed through dedicated manifolds. Domestic hot water is served from the same integrated thermal architecture.
One system therefore provides both space heating and domestic hot water, with each circuit hydraulically balanced and independently isolatable. This allows maintenance to be carried out without opening occupied living spaces or shutting down the entire system.
Particular attention was given to the mechanical room. Isolation valves were installed at individual branches, expansion vessels and air separators were positioned according to hydraulic requirements, circulation pumps can be serviced without draining the whole system, and water treatment was incorporated to protect the installation from scale and extend equipment life.
Consumption and performance records are still being collected, so no savings figure is published until a reliable measurement period is available.
Challenges
Designing a heating and domestic-hot-water system for an occupied residential property while maintaining comfort, controlling noise, minimizing the use of interior space, and allowing maintenance without disrupting the occupants.
The project also required a well-organized and serviceable mechanical room, together with water-quality treatment to address scale formation and protect the long-term reliability of the hydronic system.
Solutions
A centralized hydronic system was implemented using outdoor MAXA air-source heat pumps feeding a thermal buffer tank, from which energy is distributed to underfloor heating and domestic-hot-water circuits through independently balanced manifolds.
The mechanical room was equipped with isolation valves at each branch, expansion vessels and air separators according to hydraulic requirements, circulation pumps that can be serviced without draining the complete system, and water treatment to reduce scale and protect system components.
The architecture allows individual circuits to be isolated and serviced independently while minimizing the need for maintenance intervention inside occupied areas of the house.
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