Size a VAV box from the zone load, set a minimum airflow the sensor can measure and the ventilation needs, and pick an inlet that stays quiet.
VAV Box Selection: Sizing, Minimum Flow and Noise Read More »
Estimate the fan duty of a pressurised stair from closed-door leakage and open-door velocity, then check the door opening force and relief.
Stair Pressurisation: Quick Airflow Design Read More »
Select fan coils on sensible capacity at real conditions and medium speed: an eight-step method with a worked office, water flow and noise check.
Fan Coil Unit Selection Step by Step Read More »
Heat flux, surface limits, flow temperature and loop lengths for wet underfloor heating, with a worked living room and the bathroom that sets the flow temperature.
Underfloor Heating: Quick Design Rules Read More »
Catalogue radiator outputs are for 75/65/20 °C; at heat-pump temperatures you need two to three times more. Here are the factors and a worked room.
Radiator Sizing: Correction Factors for Low Temperatures Read More »
Find where the heat pump stops coping on its own: a straight-line load and capacity check gives the bivalent point and the backup heater size in minutes.
Heat Pump Sizing and the Bivalent Point Read More »
What the wet chemical system over a commercial cooking line does, and the gas, power, fire alarm and pull station interfaces the MEP designer owns.
Kitchen Hood Wet Chemical Systems: Design Basics Read More »
A field method for checking ducts, pipes, beams and lights around sprinkler heads: the three-times rule, the beam rule and the 1.2 m wide-obstruction rule.
Sprinkler Obstruction Rules: A Quick Field Guide Read More »
Select DCVA or RPZ, read the loss at demand flow, lay out valves, relief drain and test connection, and see how 6 psi can turn a pass into a fail.
Backflow Preventers on Fire Lines: Losses and Layout Read More »
A dry riser waits for the fire service pump; a wet riser has its own tank and pumps. How each works, which height needs which, and the NFPA 14 equivalents.
Wet Riser vs Dry Riser: Which Building Needs Which Read More »