HVAC calculators
Free, practical calculation tools for air conditioning, chillers, air handling units, fan coils, heat transfer and electrical, running in your browser.
In short31 calculators: air conditioner capacity, chiller IPLV and tower, air handling unit coil/mixing/recovery, fan coil selection, flow rate and pipe diameter, psychrometrics, U value, LMTD, cable cross-section, motor current, power factor correction, inverter savings and more. Your data stays on your device; nothing is sent to a server.
Air conditioning
Air Conditioner Capacity Calculation (BTU)Preliminary BTU and kW sizing from room areaCalculate →BTU, kW, kcal/h, TR ConverterCooling and heating capacity unit converterCalculate →Air Conditioning Energy and Operating CostElectricity consumption and cost comparison with COP and EERCalculate →
Chiller
Chiller Flow and Capacity CalculationkW, flow and ΔT calculation for water and glycolCalculate →Chiller IPLV and Seasonal EfficiencyIPLV, EER and kW/TR from part-load COP valuesCalculate →Condenser and Cooling Tower CalculationCondenser heat, water flow, evaporation and blowdown waterCalculate →Chiller Buffer Tank VolumeMinimum water volume that prevents short cyclingCalculate →
Air handling unit
Mixed Air (Fresh and Return)Mixed temperature, humidity and fresh air load in an air handling unitCalculate →Air Cooling Coil CapacitySensible and latent load, condensate and chilled water flowCalculate →Heat Recovery EfficiencyHeat recovered in plate and rotary exchangers and supply temperatureCalculate →Fan Power and SFPFan electrical power and SFP class from flow and pressureCalculate →Humidifier Capacitykg/h and power for steam and adiabatic humidificationCalculate →
Fan coil
Fan Coil Quantity and Water FlowFan coil quantity and main line flow from room loadCalculate →Fan Coil CondensateCondensate amount from latent load and drainageCalculate →
Water and hydronics
Glycol Ratio and Freezing PointEthylene and propylene glycol freezing point, required ratioCalculate →Pipe Diameter and Water VelocityDN selection and flow velocity from flow rateCalculate →Pump Power and EnergyHydraulic and motor power from flow and headCalculate →Expansion Tank VolumePreliminary tank volume for a closed-loop water systemCalculate →
Air and psychrometrics
Airflow and Duct SizingDuct section, diameter and rectangular size from velocity and flowCalculate →Air Heat Load (Sensible and Latent)kW from airflow, ΔT and humidity differenceCalculate →Psychrometrics: Dew Point, Humidity, EnthalpyAir properties from temperature and relative humidityCalculate →
Heat transfer
U-Value and Heat Loss (Transmission)U-value and heat loss for layered walls, roofs and floorsCalculate →Heat Exchanger LMTD and Area CalculationLogarithmic temperature difference and heat transfer surfaceCalculate →
Cold room
Electrical
Electrical Current and Power (1 and 3 Phase)kW and ampere conversionCalculate →Cable Cross-Section and Voltage DropCable cross-section, voltage drop and loss from current and lengthCalculate →Motor Current and Starting CurrentRated current from motor power and starting current by starting methodCalculate →Reactive Power CompensationCapacitor kVAr required for cosφ correctionCalculate →Transformer and Generator Power (kVA)kVA selection from installed load, diversity and power factorCalculate →Phase Imbalance CalculationThree-phase voltage or current imbalance percentageCalculate →Inverter (VFD) Energy SavingsAnnual kWh and cost savings from speed control on fans and pumpsCalculate →
Preliminary calculation notice: The tools are for quick sizing and information. In real projects, load calculation, equipment selection, and pipe, duct and electrical design require engineering calculations and a site survey.
Let our engineer do the calculation
Together with a site survey, we make the right capacity and equipment selection for your project. Fill in the quote form or call us: breakdown and service line 0505 263 07 23, sales and projects 0312 261 07 24.
Correct sizing, a long-lasting system.
Contact us for site survey and project support.