HVAC engineers

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 x 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 HP = 0.75 kW