Hi Guys, i had ducted heater/a/c installed by Luke back in 2012. at the moment i can zone 2 areas only both upstairs & downstairs at the same time or just downstairs. i was hoping to be able to have just upstairs on. ive had an electrician look at it who advised me i need another damper fitted. is it possible have a rough idea of price i am looking at to have that installed, site address 2/1751 Dandenong Rd oakleigh east