MEP Systems Flashcards
what are comfort levels based on?
temp & humidity
what is range of comfort level?
65F min, 72F max
Basics of heating
take heat from one area & move it where we want it
Basics of cooling
remove heat from area & discharge in different location (ie. outside)
conduction
physically touching to transfer heat/cool
convection
water/air is moving/blowing around to transfer heat/cool
radiation
one entity transfers to another across a space, direct link (ie - sun, radiator)
what does hot air do?
rise
what does cool air do?
fall
Air based hvac
can use same equip to do both, venting of air in space
need something to generate heat: boiler, stove
return & supply ducts
can not cross. design consideration of how to make work
hydronic systems
usually uses alcohol so it won’t freeze if power dies
very small, 1”-2”d pipe
very efficient
expensive, increased maintenance and risk of leaking
steam systems
very effective, moves itself through system
slow
more common on large campus, not in new construction
electric heat system
very efficient, sim to a toaster. expensive. good for supplemental heatj
alternative passive systems
trombe wall, green house, wind scoop, geothermal
