Is continuous mechanical ventilation required for dwelling units?
In another thread, the conclusion seems to be that it is impossible to rely on natural ventilation for a dwelling unit and still meet both the 2012 IMC and the 2012 IECC.
ASHRAE 62 has a procedure for calculating the outside air...
Is there some value of L/D for which the Darcy–Weisbach equation is applicable?
At what point does 'relative roughness' become meaningless?
Is there any expectation of accuracy in calculating the pressure drop through a 10-foot steel duct that is 5 feet long?
Seemingly not because the flow is...
The test port on the water service shut-off is shown on the upstream side of the valve in this detail:
http://www.cityofwpb.com/engineering/standards/2007_Details_PDFs/WATER_SERVICE/WS-10.pdf
Why would that be? If the tap is left open/leaks/etc., then turning off the valve at the connection to...
