Some conversations with like-minded HVAC professionals have a way of taking on a life of their own, especially when they’re from another country. I recently had a discussion with an HVAC contractor from Australia about total external static pressure (TESP) and testing the systems they install and service.
As we discussed test locations and system types, I discovered all airside pressure measurements and equipment specifications our Australian friends use are in pascals (Pa). In the United States, we use inches of water column (in. w.c.), so I was scrambling to convert the numbers.