Hot-air central heating systems (district heating systems F24D10/00; central heating systems using heat accumulated in storage masses F24D11/00; air conditioning F24F); Exhaust gas central heating systems

Child Classifications

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• F24D 5/005
• F24D 5/02 operating with discharge of hot air into the space or area to be heated
• F24D 5/06 operating without discharge of hot air into the space or area to be heated
• F24D 5/12 using heat pumps