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.
Starting current and torque of DOL, star-delta, soft starter and VFD side by side, a 30 kW pump example and six questions that pick the right starter.
Motor Starting: DOL, Star-Delta, Soft Starter or VFD Read More »
When busbar trunking beats parallel cables, the six checks that size it, and a 40 m riser example showing why distributed loads halve the voltage drop.
Busbar Trunking vs Cables: Selection in Practice Read More »
Size a building’s cold water storage tank from users, daily demand and storage period, then convert usable volume to a real two-compartment tank.
Water Storage Tank Sizing for Buildings Read More »
The ten VRF design mistakes we see most in drawing reviews, from oversold connection ratios and missing capacity corrections to refrigerant concentration in small rooms and condensate falls.
10 Common VRF Design Mistakes Read More »
How to select VRF branch kits (refnet joints and headers) by downstream indoor capacity, with a worked six-unit example and the installation rules that keep refrigerant flow even.
VRF Branch Kits (Refnets): Selection and Installation Rules Read More »
What Class I, II and III standpipes mean in NFPA 14, who uses them, the 500 + 250 gpm demand rule, 100 psi outlet pressure, outlet locations and pressure limits.
Standpipe Classes I, II and III Explained Read More »
Maximum hanger spacing for sprinkler pipe, unsupported end and armover limits, and a worked hanger load check using 5 × water-filled weight + 115 kg.
Sprinkler Pipe Hanger Spacing and Support Rules Read More »
Twelve sprinkler design errors that get submittals rejected, from hazard class, area modifiers and remote area shape to C-factors, obstructions, hangers and FDC position.
12 Common Sprinkler Design Mistakes Reviewers Reject Read More »
Why long SPD leads destroy the protection level, and the nine steps to wire a Type 2 SPD correctly: lead length, cross-section, back-up device and earth path.
How to Connect an SPD in a Distribution Board (the 0.5 m Rule) Read More »
The ten mistakes reviewers find most often on SLDs, each with why it is wrong and the fix, plus a checklist of the data every board and feeder should show.
10 Common Mistakes on Single-Line Diagrams Read More »