Practical, step-by-step MEP design guides with worked examples: sprinkler hydraulics, fire pumps, clean agent, heat loss, duct and pipe sizing, psychrometrics, VRF, fire alarm and electrical design.
A practical workflow to turn one model space with many title blocks into correctly named layouts and PDFs, with a 24-sheet electrical set as a walkthrough.
How to Split a Multi-Sheet AutoCAD Drawing into DWG and PDF Files Read More »
Detector spacing is a distance rule, not an area rule. Here are the smoke and heat detector radii, corridor, beam and slope rules, the NFPA 72 equivalents and a full office floor counted step by step.
Smoke Detector Spacing (and Heat Detectors): Practical Rules Read More »
A practical guide to the psychrometric chart for air handling unit design: reading the seven properties, the room SHR line, mixing, coil ADP and bypass factor, fan heat, humidification and a full summer worked example.
Psychrometric Chart for AHU Design: Mixing, Coils and Reheat Read More »
How to measure phase unbalance on a distribution board, why boards drift out of balance, and a minimal-change method that fixes most panels with one or two swaps.
Phase Balancing in Panel Schedules: Measure and Fix Unbalance Read More »
Five checks for choosing an MCB, from rating and curve to breaking capacity, and what discrimination between MCBs can and cannot achieve, with a worked example.
MCB Selection and Discrimination: A Practical Design Guide Read More »
How to size hydronic heating pipes: water flow from load and temperature difference, velocity and Pa/m criteria, Darcy–Weisbach friction, a worked 200 kW main, and the index circuit that sets the pump head.
Heating Pipe Sizing: Flow, Velocity, Pa/m and Pump Head Read More »
A practical, step-by-step EN 12831 heat loss calculation: design conditions, U-values, thermal bridges, ground and unheated spaces, ventilation, and one living room calculated in full to 904 W.
Heat Loss Calculation Step by Step: EN 12831 Worked Example Read More »
Size a fire pump to NFPA 20 in clear steps: net pressure, standard ratings, curve and pressure checks, motor power, suction rules and jockey settings, with a worked example.
Fire Pump Sizing to NFPA 20: Rated Point, Curve Checks and Jockey Read More »
A conventional panel knows the zone; an addressable panel knows the device. Here is how each system works, a simple way to choose, and the alarm sound and visual rules that apply to both.
Conventional vs Addressable Fire Alarm Systems Explained Read More »
Good loop design is mostly bookkeeping: an address budget with 20 % spare, isolators that respect the 32-detector rule, zones a fire fighter understands and cables that survive the fire. A two-loop office example shows every step.
Fire Alarm Loop Design: Addresses, Isolators, Zones and Cables Read More »