4. Heat exchange
  5. With alarm, indicator, signal, register, recorder, test or...
  6. Remotely controlled inspection means

Herbert M. Kay

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Building fresh air ventilator system

Heat exchange – With alarm – indicator – signal – register – recorder – test or... – Remotely controlled inspection means
Patent

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Roof-mounted building fresh air ventilator

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent

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Profile ID: LFUS-PAI-P-211356

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