The jumper duct connects problem rooms to the central return area to relieve room pressure when a door is closed. Building leakage can also act as an unintentional jumper duct, so inspect the room ...

A ducted single- or multi-zone system works similarly to a central heat pump system, except that it is applied as a zone solution with shorter duct runs, noted Lacey. “For example, if a two-story home ...

Mueller added that ducted fuel injection works great with conventional diesel fuel, but it works even better with oxygenated fuels, and many renewable, sustainable fuels are oxygenated.

Mr Russell says, ducted units "should be maintained on a yearly basis", and a service "should include removing and cleaning the filters or pads, ducts and the registers".

Flow-induced acoustic resonance in ducted systems is a phenomenon where the interaction between fluid flow and the geometric features of ducts gives rise to self-sustained oscillations of sound.