Skip to main content

HVAC common unit converter chart

 Here's a comprehensive HVAC unit converter chart:



Volume Flow Rate

1.CFM (Cubic Feet per Minute) to CMH (Cubic Meters per Hour): 

1 CFM ≈ 1.699 CMH

2.CFM to m³/s (Cubic Meters per Second): 

1 CFM ≈ 0.000472 m³/s


Airflow Velocity

1.FPM (Feet per Minute) to m/s (Meters per Second): 

1 FPM ≈ 0.00508 m/s

2.m/s to FPM: 

1 m/s ≈ 196.85 FPM


Energy and Power

1.BTU/h (British Thermal Units per Hour) to kW (Kilowatts): 

1 BTU/h ≈ 0.000293 kW

2.Tons of Refrigeration to kW: 

1 Ton ≈ 3.517 kW


Pressure

1.Inches of Water Gauge (in wg) to Pascals (Pa): 

1 in wg ≈ 249.08 Pa

2.PSI (Pounds per Square Inch) to kPa (Kilopascals): 

1 PSI ≈ 6.895 kPa


Temperature

1.°F (Fahrenheit) to °C (Celsius): 

°C = (°F - 32) × 5/9

2.°C to °F: 

°F = °C × 9/5 + 32


Additional Conversions

Length

1.Inches to Millimeters: 

1 inch = 25.4 mm

2.Feet to Meters: 

1 foot = 0.3048 meters


Area

Square Feet to Square Meters: 

1 sq ft = 0.0929 sq m


Volume

Gallons to Liters: 

1 gallon ≈ 3.785 liters


Flow Rate

Gallons per Minute (GPM) to Liters per Second (L/s): 

1 GPM ≈ 0.0631 L/s


Energy

Kilowatt-hours (kWh) to British Thermal Units (BTU): 

1 kWh ≈ 3412 BTU


Pressure

Bar to PSI: 1 bar ≈ 14.5 PSI


Temperature Difference

Δ°F to Δ°C: Δ°C = Δ°F × 5/9


More Conversions

Power

Horsepower (HP) to Kilowatts (kW): 

1 HP ≈ 0.7457 kW


Flow Rate

Liters per Second (L/s) to Cubic Feet per Minute (CFM): 

1 L/s ≈ 2.119 CFM


Pressure

kPa to Inches of Water Gauge (in wg):

1 kPa ≈ 4.014 in wg


Energy Efficiency

Energy Efficiency Ratio (EER) to Coefficient of Performance (COP): 

COP = EER / 3.412


Air Density

Pounds per Cubic Foot (lb/ft³) to Kilograms per Cubic Meter (kg/m³):

 1 lb/ft³ ≈ 16.018 kg/m³


Comments

Popular posts from this blog

Type of Heat Exchanger

 There are several types of heat exchangers used in HVAC systems, including: 1. Coil Type:     - Chilled water coils     - Hot water coils     - DX (direct expansion) coils     - Evaporator coils     - Condenser coils 2. Shell and Tube Type:     - U-tube heat exchangers     - Straight tube heat exchangers 3. Plate Type:     - Plate and frame heat exchangers     - Plate and shell heat exchangers 4. Finned Tube Type:     - Finned tube heat exchangers 5. Spiral Type:     - Spiral heat exchangers 6. Regenerative Type:     - Regenerative heat exchangers 7. Adiabatic Type:     - Adiabatic wheel heat exchangers 8. Run-Around Coil Type:     - Run-around coil heat exchangers These heat exchangers are used in various applications, including: - Air conditioning - Heating - Ventilation - Refrigeration - Heat recovery - Industrial processes Each type of hea...

VALVES USED IN A CHILLER SYSTEM AND THE TYPICAL VALVE PACKAGE

  VALVES USED IN A CHILLER SYSTEM AND THE TYPICAL VALVE PACKAGE 1.Chilled Water Side Valves ⇒Isolation valve (manual/electric actuated). ⇒ Installed on CHW supply and return lines.  ⇒ Used to isolate chiller for maintenance. 2. Balancing Valve (Manual or Automatic)  ⇒ Ensures correct flow rate to/from chiller.  ⇒ Helps maintain Delta T and proper flow distribution.  ⇒ Located after evaporator outlet (return line). 3. Differential Pressure Bypass Valve (if 2-way valves in system)  ⇒ Prevents excess pressure build-up when terminals shut.  ⇒ Maintains flow through chiller. 4. Flow Switch  ⇒ Senses chilled water flow across evaporator.  ⇒ Safety interlock: trips chiller if flow is lost.  ⇒ Usually paddle type or electronic. 5. Air Vent Valve (Manual or Automatic)  ⇒ Removes air pockets.  ⇒ Placed at high points of piping and chiller headers. 6. Drain Valve  ⇒ For flushing, cleaning, and maintenance.  ⇒ Located at low poin...