VRF & CAN/CSA B52 – Update

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This post references a previous blog post from March 2011, where I outlined the max refrigerant quantities allowed in a VRF system to meet CAN/CSA B52-2005.  There has been a recent update to this standard, which increases the refrigerant quantity allowance.  The following chart reflects the most recent update from CSA:

Occupancy Classification MAX Refrigerant Charge (lbs/1,000-ft3)
Institutional 12.5
Publiy Assy/Residential 25
Commercial 25
Industrial 25

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