A hybrid heating system having a heat recovery apparatus in fluid communication with a heat pump and a furnace is provided. The apparatus recovers heat from flue gas discharged from the furnace and transfers the recovered heat to a stream of refrigerant in the heat pump. The apparatus includes a shell disposed in fluid communication with the furnace and tubes disposed in fluid communication with the shell and the heat pump. The system includes valves for regulating access between the apparatus and the stream of the refrigerant in the heat pump, and a control unit in communication with the valves to regulate access between the apparatus and the heat pump during a heating mode based on operating parameters of the system.

A hybrid heating system having a heat recovery apparatus in fluid communication with a heat pump and a furnace is provided. The apparatus recovers heat from flue gas discharged from the furnace and transfers the recovered heat to a stream of refrigerant in the heat pump. The apparatus includes a shell disposed in fluid communication with the furnace and tubes disposed in fluid communication with the shell and the heat pump. The system includes valves for regulating access between the apparatus and the stream of the refrigerant in the heat pump, and a control unit in communication with the valves to regulate access between the apparatus and the heat pump during a heating mode based on operating parameters of the system.

An air conditioning system includes a heat pump unit including a radiator usable with a refrigerant, a gas furnace unit including a heating section arranged to heat passing air, a blower arranged to generate an air flow that passes through the radiator and the heating section, a first temperature sensor provided in a room, and a controller configured to control each action of the heat pump unit, the gas furnace unit, and the blower. The temperature sensor detects an indoor temperature in the room. The controller causes the gas furnace unit to operate as a heat source unit when a difference value obtained by subtracting the indoor temperature from a set temperature is equal to or greater than a first threshold at startup, and causes the heat pump unit to operate as a heat source unit when the difference value is less than the first threshold at startup.

A heat pump system with a hybrid heating system is disclosed. The heat pump system includes a first housing comprising a heat exchanger, a compressor, and a fan. The heat pump system also includes a second housing that includes a supplemental heat source that is activated when the outside air falls below a certain temperature. The second housing includes a series of dampers that permit recirculation of the air passing through the first housing so that the supplemental heat source can provide heat to the recirculated air. The supplemental heat source increases the heating capacity of the heat pump system.

A heat pump system with a hybrid heating system is disclosed. The heat pump system includes a first housing comprising a heat exchanger, a compressor, and a fan. The heat pump system also includes a second housing that includes a supplemental heat source that is activated when the outside air falls below a certain temperature. The second housing includes a series of dampers that permit recirculation of the air passing through the first housing so that the supplemental heat source can provide heat to the recirculated air. The supplemental heat source increases the heating capacity of the heat pump system.