Page 452 - The Engineering Guide to LEED-New Construction Sustainable Construction for Engineers

412 App endix A

Symbol Chapter Definition (typical units as applicable)
PBU 2 Peak building users during shift j (people per shift)
j
PD 2 Previously developed: all areas that have been built
upon, landscaped, or graded (this does not include
areas that may have been farmed in centuries past
and have returned to natural vegetation)
PDEE 4 Proposed design electrical energy from the PDEM
model (kWh/yr)
PDEM 4 Proposed design energy model (energy $/yr)
PDEMP 4 Proposed design energy model process load (energy
$/yr)
PDEMR 4 Proposed design energy model regulated load (energy
$/yr)
PED25LS 2 The special pedestrian areas with a minimum of 25%
landscaping
PGEBAE 4 Percent green electricity (from off-site) based on the
building annual energy (BAE) model if EAc1 Option
1 is not sought
PGEPB 4 Percent green electricity (from off-site) based on the
proposed building performance (PBP) model if EAc1
Option 1 is sought
PREBAEC 4 Percent renewable energy based on the building
annual energy cost (Option 2)
PREPDEM 4 Percent renewable energy based on the proposed
design energy model (Option 1)
PRR 3 Prerinse spray water use rate for fixture type i (usually
i
gal/min or gpm)
3
3
Q 10 Runoff rate (length /time, usually ft /s or cfs)
3
Q 10 Miscellaneous flows into a BMP (length /time, usually
misc
3
ft /s or cfs)
3
3
Q 10 Total runoff out of a BMP (length /time, usually ft /s
out
or cfs)
Q 4 The gross ARI rated total cooling capacity of all HVAC
total
or refrigeration (ton )
ac
Q 4 The gross ARI rated cooling capacity of an individual
uniti
HVAC or refrigeration unit i in ton . (A ton of
ac ac
cooling capacity is based on an older system of rating
refrigeration when tons of ice were delivered for
iceboxes. The tonnage given is actually in tons of ice
melted in 24 h. One ton of cooling can be directly
ac
converted to 12,000 Btu/h)
3
Q 10 Runoff from upslope areas into a BMP (length /time,
up
3
usually ft /s or cfs)