Hybrid electrocaloric heat pump system

A building heating or cooling system, comprising

• an air handling system comprising an air delivery flow path in fluid communication with a conditioned space in the building;
• an electrocaloric heating or cooling system comprising first and second electrocaloric modules, a first inlet that receives air from the conditioned space or the air delivery flow path and directs it through the first or second electrocaloric module to a first outlet to the conditioned space or the air delivery flow path, and a second inlet that receives air from the conditioned space or the air delivery flow path and directs it through the first or second electrocaloric module to a second outlet to outside the conditioned space;
• and
• a controller configured to alternately energize and de-energize the first and second electrocaloric modules while alternating air flow through the first and second electrocaloric modules between a first operational state in which the first module is energized and in fluid communication with the first inlet and first outlet and the second module is de-energized and in fluid communication with the second inlet and second outlet, and a second operational state in which the first module is de-energized and in fluid communication with the second inlet and second outlet and the second module is energized and in fluid communication with the first inlet and first outlet,
• wherein the first inlet receives air from the conditioned space and the first outlet discharges air to the air delivery flow path, and the second inlet receives air from the conditioned space and the second outlet discharges air to outside the conditioned space.