How to turn a list of fixtures into a realistic peak flow and a pipe size with EN 806-3 loading units or IPC fixture units, with a worked 10-flat riser example.
Domestic Water Pipe Sizing with Fixture Units (EN 806-3 and IPC) Read More »
A fast, defensible way to estimate the head of a closed chilled water pump from the index circuit, with typical component losses, a worked 900 kW example at 229 kPa and the mistakes that oversize pumps.
Chilled Water Pump Head: A Quick Estimate Read More »
A quick first design for jet fan car park ventilation: total airflow by area rate or air changes, jet fan thrust and airflow, spacing and count, gas sensing and fire-mode pointers, worked for a 5000 m² basement.
Car Park Ventilation with Jet Fans: Quick Design Read More »
Two quick methods for tray width (sum of diameters and area fill), a worked riser example, and the grouping factors and spans that make a tray schedule hold up.
Cable Tray Sizing: Fill, Spacing and Derating in Practice Read More »
How to size a domestic water booster set: probable peak flow, the five parts of the pump head, duty/standby arrangement and power, with a worked example.
Booster Pump Set Sizing for Buildings Read More »
Quick rules to size an air handling unit before the selection software is open: airflow from the sensible load, casing and coil velocities, coil and fan duties and the plant room space, with a worked 2.0 m³/s DOAS example.
AHU Sizing: Quick Rules for Airflow, Coil and Footprint Read More »