If the inside dims setting is configured on lined ductwork. A user would have to input the metal size minus the thickness of the lining. e.g. 1000x1000 duct with 100mm lining would be entered as 800x800. It looks like the straight installation tables read the 800x800 value rather than 1000x1000.
Just in case im not explaining what the issue is. The labour table are reading the dimensions A & B and do not address that the overall duct size is actually 1000x1000. So a 25mm lined duct costs more than a 100mm lined duct as the values Estmep reads are 950x950 vs 800x800.
Additional information. I have submitted this issue to our local reseller and have confirmed that the Installation tables are reading incorrect information within Estmep.
