Teco Heater Kit - F21B2099 or BeforeHeater kit for R290 models with the serial number of F21B2099 or before. This heater kit has a ground wire. Item Number: KRES03#TK25 If you are also purchasing a compatible chiller As a courtesy to our customers, your chiller will arrive with Heater Kit(s) and or UV Sterilizer Kit(s) pre installed at no extra charge. If you would prefer not to have any accessories pre installed, please indicate as such in the "Additional Comments" field during