A system comprising: a first row of electrocaloric capacitors (910, 912) separated by a first insulation region (930, 932); a second row of electrocaloric capacitors (920, 922) proximate the first row of electrocaloric capacitors (910, 912) wherein the proximity enables heat transfer between the first and second rows of electrocaloric capacitors, the capacitors of the second row of electrocaloric capacitors (920, 922) separated by a second insulation region (935, 937); a support layer (950, 960, 965) between the first row of electrocaloric capacitors (910, 912) and the second row of electrocaloric capacitors (920, 922); and an actuator configured to shift the first row of electrocaloric capacitors relative to the second row of electrocaloric capacitors; wherein a first electric field is applied to the first row of electrocaloric capacitors and a second electric field is applied to the second row of electrocaloric capacitors, and wherein the first and second electric fields are complementary such that when the first and second electric fields are applied to their respective electrocaloric capacitors the temperature of the first row of electrocaloric capacitors rises in accordance with a rising first electric field and the temperature of the second row of electrocaloric capacitors decreases in accordance with a decreasing second electric field or the temperature of the first row of electrocaloric capacitors decreases in accordance with a decreasing first electric field and the temperature of the second row of electrocaloric capacitors increases in accordance with a rising second electric field, and wherein the actuator is configured to shift the first row of electrocaloric capacitors relative to the second row of electrocaloric capacitors in correspondence with the raising and lowering of the first and second electric fields, characterised by comprising at least one thermally conductive via through the support layer (950, 960, 965); a first row of electrocaloric capacitors (910, 912) separated by a first insulation region (930, 932); a second row of electrocaloric capacitors (920, 922) proximate the first row of electrocaloric capacitors (910, 912) wherein the proximity enables heat transfer between the first and second rows of electrocaloric capacitors, the capacitors of the second row of electrocaloric capacitors (920, 922) separated by a second insulation region (935, 937); a support layer (950, 960, 965) between the first row of electrocaloric capacitors (910, 912) and the second row of electrocaloric capacitors (920, 922); and an actuator configured to shift the first row of electrocaloric capacitors relative to the second row of electrocaloric capacitors; wherein a first electric field is applied to the first row of electrocaloric capacitors and a second electric field is applied to the second row of electrocaloric capacitors, and wherein the first and second electric fields are complementary such that when the first and second electric fields are applied to their respective electrocaloric capacitors the temperature of the first row of electrocaloric capacitors rises in accordance with a rising first electric field and the temperature of the second row of electrocaloric capacitors decreases in accordance with a decreasing second electric field or the temperature of the first row of electrocaloric capacitors decreases in accordance with a decreasing first electric field and the temperature of the second row of electrocaloric capacitors increases in accordance with a rising second electric field, and wherein the actuator is configured to shift the first row of electrocaloric capacitors relative to the second row of electrocaloric capacitors in correspondence with the raising and lowering of the first and second electric fields, characterised by comprising at least one thermally conductive via through the support layer (950, 960, 965);