Ducted Air Conditioning St Johns Park

Local knowledge

Ducted in St Johns Park homes

Ducted in St Johns Park is designed around levels. The 1970s and 80s homes on the slopes are often split-level, with a bedroom wing half a floor above the living area, and the two are never at the same temperature unless they are zoned separately, so we treat each level as its own zone and size the ducts for the room loads on that level rather than splitting one supply evenly. The pitched tile roofs give a good cavity, so the fan coil goes in the roof over the upper level and the lower-level outlets run down through a wall cupboard or a short bulkhead. The single-storey brick homes on the flatter streets are the simplest job in the suburb, with room for full-size ducting and a compact system from ~$11,000 covering the bedrooms and living on two zones. Granny flats behind the bigger blocks get a split rather than a long duct branch.

Abbotsbury is where the sun does the designing. The 1990s two-storey homes on the Parklands rim carry lower-pitched dark tile roofs with a tighter cavity, so the fan coil placement and duct routing over the first floor take more planning, and the ground floor is fed by rigid drops through a cupboard or a boxed bulkhead so the airflow is not throttled. The west-facing upstairs zone gets more capacity than its floor area suggests because it is taking hours of unobstructed afternoon sun, and the return air sits high on the landing where the heat collects. The condenser goes on the eastern or southern side of the house, shaded on a 40 degree afternoon, with the wide Abbotsbury blocks making that easy. In winter the same system heats the house on the frosty mornings the Parklands edge gets. Ducted running cost is roughly $1–$2 per hour whole-home, and with the zones used properly a family sits at the lower end of that.