Does anyone know of approved methods to prove this credit without completing a full energy model to simulate indoor conditions, in particular radiant heat?
It seems a Psychrometric chart is no longer acceptable.
We have a DC fan coil unit system with VSD control in climate Zone 2A (Warm/Humid)
Our reviewer is asking for us to provide documentation, such as PMV/PPD calculations or ASHRAE comfort tool results, demonstrating how the thermal comfort conditions have been established for the project and how the design of the conditioning system addresses the thermal comfort design with air speeds greater than 40 feet per minute.
We can do this if we run a full energy model but as it is a small LEED-CI project following prescritpive approach we are not doing modelling.
Dylan Connelly
Mechanical EngineerIntegral Group
LEEDuser Expert
472 thumbs up
July 31, 2012 - 11:47 am
In the past we have estimated our radiant heat without an issue. We typically submit our psychrometric chart in addition to a PMV/PPD calculation.
If you input over 40 fpm into the PMV calculator often doesn't comply, that is why the LEED reviewer is questioning your design criteria.