The clients wanted to do charge out rate to the tenant for air condition used.
The problem arises when One unit AHU is supplying to 4 different Tenants per floor.
I have been told to use the VAV air flow to do CFM totalizer eventually to do charge out rate.
However, I don't agree with the concept using VAV to do charge out rate since the VAV does not act independent as fcu or vrv system.
I know there is kw/hour, btu/hour but i never heard of cfm/hour.
Would appreciate anyone can share some thoughts on this issue or can direct me to the explanation website/page since i am in controls system.