Ducting is sized and placed according to the house layout and the desired air distribution. As long as the ductwork meets the requirements of both the unit and the air conditioned space then it is fine to keep the old ducting if it is in good condition. This would need to be confirmed with your air conditioning installer in accordance with your particular requirements.
Kyle Rafter
General Manager, Product & Strategy at Fujitsu General Australia & New Zealand
Kyle has over 16 years experience within the air conditioning industry. Since joining Fujitsu General in 2015, Kyle has driven innovation and growth, leveraging his expertise in commercial business development. Passionate about cutting-edge technology, Kyle is dedicated to advancing sustainable solutions in the air conditioning sector.