Performed heating maintenance on two Birnham boilers one hot water and one steam removed and clean burners and igniter and standing pilot replaced thermocouple on hot water boiler. Remove pressure control and cleaned on steam boiler. Also, reset water feeder. Highly recommend to replace main steam vent located in basement also recommend to replace steam vent located first floor rare right hand side radiator. Also performed maintenance on three heat pumps replaced filter filters 16 x 20 by 1 18 x 25 by one 14 x 30 by one and 12 x 12 by one checked refrigerant pipe temp and blower wheels also check electrical and mechanical components left system functional View visual findings from this job here - https://visionshare.xoi.io/?id=XA-90AE-CDDAF44E34794FCDB2394D066D3CE79A To replace the thermocouple for the hot water boiler