As an example, you could have a multi-split a/c system with 5 indoor systems and there might be a maximum individual pipeline size of 25 metres yet the total optimum pipe length is just 75 metres. http://ironbridgegolf.com/__media__/js/netsoltrademark.php?d=www.metooo.co.uk%2Fu%2F65fa3e043d09f71e96c97eff