The significance of glazing type and external shading can have a phenomenal outcome on the sizing of HVAC equipment. The result can exhibit a huge saving for the client and our environment on energy consumption and CO2 emissions. 

No shading on the left - shading on the right with 85% HVAC load reduction!

Recent technology has allowed for single glazing to be retrofitting into double and even triple-glazed building facades.  Amazingly this retrofit can take place on the inside of the building - allowing for a multi highrise building to be retrofitted.

Retrofitting a single glass facade into one of triple-glazings