Important Units Conversions for HVAC Engineers As Mechanical & HVAC professionals, quick unit conversions are essential in daily calculations, troubleshooting, and system design. Here is a quick reference list of commonly used engineering conversions. 🔹 LENGTH • 1 m = 3.28 ft • 1 ft = 12 in = 0.305 m • 1 in = 25.4 mm 🔹 FLOW • 1 L/s = 2.12 cfm • 1 L/s = 15.85 U.S. gpm • 1 L/s = 3.6 m³/h 🔹 PRESSURE • 1 Bar = 10⁵ Pa • 1 Bar = 14.5 psi • 1 Bar = 10 m.w.g • 1 Bar = 750 mm Hg • 1 in.w.g = 249.09 Pa 🔹 VOLUME • 1 m³ = 35.28 ft³ • 1 m³ = 1000 L • 1 U.S. gal = 3.785 L • 1 U.K. gal = 4.55 L 🔹 MASS • 1 kg = 1000 g • 1 kg = 35.27 oz • 1 kg = 2.2 lb • 1 tonne = 1000 kg 🔹 TEMPERATURE • °C = °K − 273.15 • °F = (°C × 1.8) + 32 🔹 COOLING LOAD • 1 kW = 3415 Btu/hr • 1 RT = 3.517 kW • 1 RT = 12,000 Btu/hr • 1 MBH = 1000 Btu/hr • 1 MBH = 0.29 kW 🔹 VELOCITY / SPEED • 1 m/s = 197 fpm • 1 fpm = 1 cfm/ft² 🔹 ENERGY • 1 Btu = 1055 J 🔹 AREA • 1 m² = 10.76 ft² 🔹 ELECTRIC POWER • 1 H...
How to Design a Building Water Supply System (Step-by-Step Guide) Designing a building water system is a critical part of MEP engineering. It ensures adequate water supply, proper pressure, hygiene, and long-term reliability. Here’s a practical guide every engineer should know 👇 💧 1. Understand Water Demand (Load Calculation) Start by calculating total water requirement: Number of occupants Fixture units (toilets, basins, showers, etc.) Usage type (Residential, Commercial, Hospital) 👉 Methods used: Fixture Unit Method Per capita consumption (e.g., 150–250 L/person/day) 🏢 2. Define Water Sources Municipality supply Borewell / Tanker Combination system 👉 Always consider backup source for reliability 🛢️ 3. Storage Tank Design Typical arrangement: Underground Tank (UGT) Overhead Tank (OHT) Design considerations: Daily consumption Fire reserve (if combined) Emergency storage (1–2 days) ⚙️ 4. Pump Selection & Design Transfer Pump (UGT → OHT) Booster Pump (Direct supply system...