Upon arrival client stated that she will be needing to leave during maintenance and no-one else is home. Spoke to landlord. Office will contact client to schedule maintenance visit. Completed maintenance on one Dunkirk, hot water boiler, checked and cleaned burners and igniters/Flame sensors also cleaned burner trays and checked electrical and mechanical components. Highly recommend replacement of The igniter/flame sensor also performed maintenance on two Hydro air handlers turned systems on and checked operations left system working also replaced filter 18 x 20 by one one filter for attic system and replaced filters 14 x 20 by one for basement system checked systems operation left working View visual findings from this job here - https://visionshare.xoi.io/?id=XA-90AE-634AD3BAC508401AB4EF7FCDA7E91E56 please see photos for more information