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Enclosure cooling & airflow calculator
Calculate enclosure cooling CFM and room air changes with fan sizing margin recommendations.
Estimate cooling airflowData Center Thermal Management, Industrial Chilling & Air Systems
HVAC & Industrial Cooling Tools
HVAC and refrigeration calculations for airflow CFM, duct resistance, fan noise, plume abatement cooling towers, industrial chillers and compressed air.
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HVAC Duct Friction Loss & Static Pressure Calculator
Input airflow, duct dimensions, length, roughness, and fittings to calculate friction loss, dynamic pressure, and external static pressure (ESP) using Darcy-Weisbach.
Calculate duct static pressure lossBrowser tool
Fan Affinity Laws & Sizing Calculator
Scale fan CFM, static pressure and motor brake horsepower across RPM speed variations and geometrically similar impellers using aerodynamic affinity laws.
Calculate fan lawsBrowser tool
Fan & Pump Motor Sizing and IEC Frame Sizing Calculator
Input airflow/flow rate, static/total pressure, fan efficiency and drive type to calculate air power, brake horsepower (BHP), IEC motor frame, and full load amps (FLA).
Size fan and pump electric motorsBrowser tool
Fan wall N+1 redundancy array & energy optimization calculator
Calculate air flow balance, RPM load, and single-unit outage contingency for data center (AHU/CRAH) and cleanroom fan walls under N+1/N+2 redundancy, solving for cubic affinity-law energy savings and optimal operating costs.
Optimize fan wall redundancy arrayBrowser tool
EU ErP fan ecodesign compliance calculator
Calculate minimum target efficiency thresholds (η_min) for axial, centrifugal and mixed flow fans under European Commission Regulations (EU) 327/2011 and (EU) 2024/1834, verifying CE ecodesign compliance and efficiency margins.
Verify EU ErP fan ecodesign complianceBrowser tool
Equipment noise decibel summation & distance attenuation calculator
Calculate logarithmic sound power summation, hemispherical geometric distance decay, sound pressure level (dBA), silencer attenuation, and OSHA permissible noise exposure durations for industrial fans and pumps.
Calculate fan noise distance attenuationBrowser tool
High altitude & elevated temperature air density derating calculator
Solve for true moist air density and derating factor K_rho across elevation, temperature and relative humidity using the ICAO standard atmosphere model and Tetens vapor equation, calculating CFM compensation and static pressure derating.
Calculate altitude air density deratingBrowser tool
Industrial Centrifugal Induced Draft Fan Inlet Box Pressure Drop and Turning Vanes Calculator
Calculates 90° lateral inlet box velocity pressure, fan inlet cone throat velocity, local pressure loss (Pa), AMCA 201 System Effect Factor (SEF), and energy-saving benefits of turning vanes in accordance with AMCA 201 and industrial ventilation standards.
Calculate centrifugal fan inlet box pressure loss and turning vane sizingBrowser tool
Industrial Cooling Tower Sizing & Approach Calculator
Compliant with Cooling Technology Institute CTI STD-201 specifications and ASHRAE 90.1 HVAC energy standards, enter circulating water flow rate (m³/h), hot water inlet temperature (°C), cold water outlet temperature (°C), local ambient wet-bulb temperature (°C), and tower structural type (counterflow / crossflow / closed-circuit). Accurately calculate cooling Range, thermal Approach, total heat rejection load (kW & Refrigeration Tons RT), approach-corrected nominal tower capacity rating, recommended axial airflow (m³/h & CFM), fan motor installed power (kW), and total makeup water consumption (m³/h) covering evaporation, drift, and blowdown losses.
Size industrial cooling tower and approach temperatureBrowser tool
Industrial Cooling Tower Evaporation, Drift & Makeup Water Calculator
Calculate cooling tower mass water balance, evaporation loss E, drift D, blowdown B, and total makeup water M per CTI and Marley standards. Inputs circulation flow, hot/cold water temperatures, ambient wet-bulb, cycles of concentration (COC), drift rate, and water tariffs.
Calculate cooling tower evaporation and makeup waterBrowser tool
Industrial Plume Abatement Cooling Tower Psychrometric Mix & Heating Duty Calculator
Calculates hybrid plume abatement cooling tower dry/wet psychrometric mix point, discharge relative humidity, maximum oversaturation mist condensation, and finned-coil heating load based on CTI Tangent Criteria.
Calculate cooling tower plume abatement mixed state and dry coil heating dutyBrowser tool
Industrial Chiller Cooling Capacity & Process Heat Load Calculator
Calculates process cooling heat load, tons of refrigeration (RT), rated chiller capacity (kW), compressor electrical power consumption, and cooling tower water requirements per ASHRAE and AHRI 550/590 standards for injection molding, laser cutting, and chemical reactors.
Calculate chiller cooling capacity and loadBrowser tool
Industrial Chiller Cooling Capacity & Chilled Water Flow Calculator
Convert industrial chiller cooling capacity (kW, RT, BTU/hr, kcal/h) and chilled water circulation flowrate (m³/h, L/min, GPM), and calculate circulation pump motor power and pipe sizing DN based on AHRI 550/590 thermodynamics.
Convert industrial chiller cooling capacity and water flowBrowser tool
Industrial Compressed Air Dryer Pressure Dew Point & Purge Loss Sizing Calculator
Calculate refrigerated and desiccant compressed air dryer temperature/pressure correction factors, rated sizing airflow, regeneration purge air loss CFM, and compressor power loss based on ISO 7183 and ISO 8573-1.
Size compressed air dryer pressure dew point and purge lossBrowser tool
Compressed Air Pipe Sizing & Pressure Drop Calculator
Calculates compressed air flow velocity, equivalent fitting length, Darcy-Weisbach friction pressure drop, and recommended pipe diameter per ISO 1217 and CAGI guidelines for aluminum, stainless steel, carbon steel, and copper piping.
Calculate compressed air pipe sizing and pressure dropBrowser tool
Air Compressor Receiver Tank Sizing Calculator
Size compressed air receiver tanks per CAGI and Atlas Copco standards. Enter compressor FAD, working pressure, minimum pressure, peak surge air demand, surge duration, and cycle frequency to calculate surge volume, cycling buffer volume, standard vessel capacity, charging time, and ASME safety relief valve sizing.
Calculate air compressor receiver tank capacitySector engineering guide
What is the engineering workflow for equipment heat dissipation and ventilation?
Calculate required CFM based on heat dissipation kW and allowable temperature rise, determine system duct static resistance, scale fan speeds and predict boundary noise levels via Fan Laws and Fan Noise tools, and configure Fan Wall N+1 redundancy.
How to balance chiller plant loads with cooling tower heat rejection?
Size evaporator tonnage, water GPM and pumping head using Chiller Cooling Capacity, match heat rejection to atmospheric wet-bulb using Cooling Tower Sizing, and mitigate winter exhaust plume fog using the Plume Abatement tool.
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Already have an account? Open your workspace →Sector engineering FAQs
Why does setting an undersized Delta T inflate airflow requirements?
Required CFM is inversely proportional to temperature rise (Delta T). Sizing for an unrealistically narrow rise (e.g. 3-5 deg C) doubles required air volumetric flow, ballooning fan sizes, duct footprints and lifecycle fan electrical power.
What is the thermodynamic principle behind cooling tower plume abatement?
Warm saturated exhaust air mixing with cold ambient air exceeds saturation vapor pressure, condensing into visible white fog. Plume abatement towers blend a heated dry airflow stream with the wet exhaust to ensure the mixed state stays below saturation.
Why must compressed air dryer capacity be derated for inlet temperature and pressure?
Dryer ratings are indexed to standard conditions (20 deg C, 7 bar g). High ambient summer temperatures dramatically expand moisture loading while lower operating pressures accelerate volumetric face velocity, requiring ISO 7183 derating.