Patent ID: 9683748
Date: 2017-06-20
CPC Classifications: F24D,F24H

Claim:
1. A rooftop air conditioning unit to provide conditioned air to a conditioned space within a building, comprising: a housing, disposed on a roof of the building roof, defining a pathway from an inlet fed by exterior and/or interior air to an outlet leading to the conditioned space; and a hydronic heating system comprising: a heating element disposed within the housing; a heat exchanger disposed within the housing; a fluid supply circuit comprising piping coupled to the heating element and the heat exchanger and a pump disposed along the piping to urge fluid heated by the heating element to be transported to the heat exchanger to heat the air traveling along the pathway; a secondary heat exchanger disposed within the conditioned space; valves disposed along the piping; and a secondary fluid supply circuit, which is fluidly coupled to the heating element via the valves and the piping and to the secondary heat exchanger, the secondary fluid supply circuit being configured to transport a secondary fluid to the heating element via the valves and the piping whereby the secondary fluid is heated by the heat generated therein and to transport the secondary fluid to the secondary heat exchanger for secondary heat exchange within the conditioned space.