Heat pump in a prefab new build: sizing, flow temperature and efficiency
Heat pumps are common in new German homes. Good insulation and low system temperatures support efficiency, but the system still needs to be sized for heat .
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Energy & efficiency
Practical guides, calculators and background information, from early planning to concrete decisions.
Editorial essentials
Air-source vs ground-source heat pump for a new home: what fits the site?
Air-source systems are easier to deploy; ground-source systems can be more efficient but need boreholes or ground collectors and may require additional per.
Solar PV on a prefab new build: roof design, self-consumption and batteries
Plan PV together with roof geometry, structure, meter cabinet, heat pump and potential EV charging. Economics depend on generation, self-consumption, inves.
Solar battery storage in a new home: matching battery size to consumption
A larger battery is not automatically more economical. PV generation, overnight load, heat pump and EV demand, charge power, efficiency and future tariffs .
Combining heat pump and solar PV in a new build: what actually works together
Heat pumps and PV complement each other but not perfectly in time: heating demand peaks in winter while PV peaks in summer. Good controls, low flow tempera.
KfW 458 and heat pumps: why this heating grant is not a standard new-build subsidy
KfW 458 is frequently searched, but it is designed for existing residential buildings. As of August 2026, KfW requires the building application or notifica.
Efficiency House 40 for a prefab home: technical meaning and KfW context
“Efficiency House 40” is not just a marketing label. Funding requires technical evidence and compliance with the applicable minimum requirements, so suppli.
Heat pump noise and siting: planning the outdoor unit on a residential plot
For air-source heat pumps, outdoor-unit location is part of site planning. Reflections from walls, distance to bedrooms and neighbours, and manufacturer so.
Energy-efficient prefab homes: envelope first, technology second
How insulation, airtightness, windows, heat pumps and solar can work together in a prefab home.
Go deeper
Specific questions & scenarios
These pages answer narrower search and decision questions with calculations, visuals and sources.
home battery for a 210 m² prefab house: 2026 consumption and operation
Practical guide to home battery in a 210 m² prefab house: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
heat pump for a 130 m² detached house: 2026 consumption and operation
Practical guide to heat pump in a 130 m² detached house: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
insulation and building envelope for a 90 m² prefab bungalow: 2026 system integration
Practical guide to insulation and building envelope in a 90 m² prefab bungalow: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
Efficiency House 40 for a 140 m² modular house: 2026 planning
Practical guide to Efficiency House 40 in a 140 m² modular house: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
heat pump for a 70 m² timber prefab house: 2026 planning
Practical guide to heat pump in a 70 m² timber prefab house: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
underfloor heating + heat pump for a 110 m² prefab bungalow: 2026 sizing
Practical guide to underfloor heating + heat pump in a 110 m² prefab bungalow: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
Efficiency House 40 for a 110 m² prefab house: 2026 sizing
Practical guide to Efficiency House 40 in a 110 m² prefab house: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
heat pump + solar PV for a 110 m² prefab house: 2026 sizing
Practical guide to heat pump + solar PV in a 110 m² prefab house: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
home battery for a 100 m² prefab bungalow: 2026 cost factors
Practical guide to home battery in a 100 m² prefab bungalow: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
home battery for a 180 m² timber prefab house: 2026 consumption and operation
Practical guide to home battery in a 180 m² timber prefab house: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
underfloor heating + heat pump for a 70 m² modular house: 2026 cost factors
Practical guide to underfloor heating + heat pump in a 70 m² modular house: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
insulation and building envelope for a 140 m² prefab house: 2026 planning
Practical guide to insulation and building envelope in a 140 m² prefab house: check loads, building envelope, plant space, electricity use, funding eligibility and quotations in a structured way.
More guides
Specific search questions & decisions
heat pump for a 60 m² prefab house: cost and sizing at Efficiency House 40
Practical guide to heat pump for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
heat pump for a 60 m² prefab house: cost and sizing at new-build standard
Practical guide to heat pump for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
heat pump for a 60 m² prefab house: consumption and operation at Efficiency House 40
Practical guide to heat pump for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
heat pump for a 60 m² prefab house: consumption and operation at new-build standard
Practical guide to heat pump for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
heat pump for a 60 m² prefab house: system integration at Efficiency House 40
Practical guide to heat pump for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
heat pump for a 60 m² prefab house: system integration at new-build standard
Practical guide to heat pump for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
photovoltaics for a 60 m² prefab house: cost and sizing at Efficiency House 40
Practical guide to photovoltaics for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
photovoltaics for a 60 m² prefab house: cost and sizing at new-build standard
Practical guide to photovoltaics for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
photovoltaics for a 60 m² prefab house: consumption and operation at Efficiency House 40
Practical guide to photovoltaics for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
photovoltaics for a 60 m² prefab house: consumption and operation at new-build standard
Practical guide to photovoltaics for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
photovoltaics for a 60 m² prefab house: system integration at Efficiency House 40
Practical guide to photovoltaics for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.
photovoltaics for a 60 m² prefab house: system integration at new-build standard
Practical guide to photovoltaics for a 60 m² prefab house in Germany: sizing, interfaces, energy use, funding checks and technical evidence.