HVAC & Plumbing – Projects and Qualified Teams

HVAC & plumbing covers heating, ventilation, and sanitary as an integrated trade – the central supply systems of every building. Unlike awarding heating or plumbing separately, an HVAC team delivers complete installation services from one source: heat generator, manifolds, radiators or underfloor heating, drinking water installation, drainage, ventilation with heat recovery, and domestic hot water with solar thermal. This eliminates trade interfaces and significantly speeds interior fit-out. Example Germany: drinking water per DIN 1988 and Trinkwasserverordnung, heating per GEG, ventilation with heat recovery per DIN 1946-6.

FAQ

How much does a complete HVAC package cost per m² of living area?

Which heat generators are current standard?

Which ventilation systems in residential?

What is the typical sequence for new build?

Which permits and registrations are required?

What are common defects?

How much does a complete HVAC package cost per m² of living area?: Example Germany: single-family house 130 m² with heat pump, underfloor heating, plumbing, 2 bathrooms, ventilation with HRV: 40,000–55,000 € (about 300–420 €/m²). In Poland rates are typically 30–40 % below German levels.
Which heat generators are current standard?: Example Germany: air-to-water heat pump as standard for new build (60 % market share). Brine-to-water HP where geothermal is available. Pellet boiler in existing buildings with limited electrical capacity. Condensing gas from 2025+ excluded from subsidies – existing systems only.
Which ventilation systems in residential?: Central ventilation with heat recovery (HRV ≥80 %): standard for KfW efficiency houses. Decentralised pendulum units per room as a budget alternative. Pure exhaust ventilation in bathrooms and kitchens is mandatory. Passive houses require HRV.
What is the typical sequence for new build?: 1. Earthworks for water/sewer connections. 2. Shell. 3. Pre-installation of heating/sanitary in walls. 4. Screed with heating pipes. 5. Final sanitary fit after tiling. 6. Heat-generator connection. 7. Commissioning and balancing. Ventilation runs in parallel from drywall stage.
Which permits and registrations are required?: Example Germany: heat pump above 12 kW must be registered with the grid operator, condensing boilers require chimney sweep approval, BAFA/KfW subsidies must be applied for before work starts. Drinking water systems require hygienic commissioning per DIN EN 806-4. Ventilation balancing report is mandatory.
What are common defects?: Wrongly sized heat generator (oversized: cycling, undersized: comfort loss), unbalanced heating system with extra consumption, sound transmission in drinking-water pipes, missing flow-velocity limits in ventilation ducts, forgotten drains for safety valves.

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