Associated Equipment
Duct Insulation
External ductwork lagging deteriorates with time, particularly if fitted with PIB type insulation. Once it breaks down the ductwork will get wet and corrode. This can be stripped and replaced to current standards.
It is surprising how older ductwork is often not insulated at all, particularly return air ductwork. Poorly lagged or unlagged ductwork can lose 3 0 C over 20 metres, so remedial work will have an immediate benefit.
Chillers
Chillers, air conditioning units, air cooled condensers, plus air handling units and louvred air intakes are prone to getting blocked with pollen, leaves, dust and debris. They can be fitted with air intake screens, which are easy to clean and have been proved to reduce energy consumption, reduce maintenance time and prolong filter life. These screens have a rapid payback on investment.
DX Units and Rooftop Units
External AC units can be fully refurbished as detailed above, and modifications made so that a replacement refrigerant drop-in can be provided to replace R22. These include R417A and R422D.
Variable Pitch Axial Fans
While these can be efficient, the problem is often that the pneumatic actuators no longer function to operate the inlet guide vanes, so control is lost. AHS can replace these fans with super efficient EC fans, or plug fans, in banks if necessary.
