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Thermal / HVAC

HVAC, Psychrometrics, and Thermal Load Simulators

A practical hub for HVAC calculations: psychrometrics, AHU heat balance, building loads, cooling coils, cooling towers, and heat pumps.

12 related simulators

This hub groups closely related tools with static links. Individual simulator URLs stay unchanged while users can move quickly to the right calculation.

Core simulators
Psychrometric Chart Calculator — Dry-Bulb, Humidity Ratio & Enthalpy
Plot air properties on a live psychrometric chart.
Sensible Heat Factor (SHF) Calculator — HVAC Load Balance
Sums sensible and latent cooling loads from occupants, lighting, equipment and outdoor air, returns SHF=Q_s/Q_t in real time, and plots the SHF line on...
WBGT Heat Index Simulator
The WBGT (Wet Bulb Globe Temperature) heat index simulator computes natural wet-bulb temperature, globe temperature and WBGT in real time from air tempe...
AHU Heat Balance Simulator
A nearby simulator for comparing HVAC load, moist air, and heat-source conditions before moving to the next check.
Cooling Coil Load Simulator — Sensible, Latent & Total Heat
Cooling coil load simulator: compute sensible, latent and total heat loads, dehumidification rate and SHF from inlet and outlet air, with the cooling pr...
HVAC Thermal Load Calculator
Calculate real-time HVAC thermal loads: envelope, solar gain, occupancy & ventilation.
Building Heat Loss Simulator - U-Value, R-Value & Heating Load Calculator
Simulate building heat loss in real time.
Heat Pump & Refrigeration Cycle Calculator
Interactive heat pump and refrigeration cycle calculator.
Heat Pump & Refrigeration COP Calculator — Carnot Cycle Efficiency
Calculate heat pump and refrigeration efficiency instantly.
Heat Pump Cycle Simulator — COP Calculation & p-h Diagram
Simulate and plot a vapor-compression refrigeration cycle on a p-h diagram in real time.
Cooling Tower Simulator (Merkel Method / NTU Method)
Real-time calculation of cooling tower performance using the Merkel method (NTU method).
Newton's Law of Cooling — Coffee Simulator
Explore Newton's law of cooling interactively.

Explore by task

Psychrometrics and comfort

Psychrometric Chart Calculator — Dry-Bulb, Humidity Ratio & Enthalpy Sensible Heat Factor (SHF) Calculator — HVAC Load Balance WBGT Heat Index Simulator

Air handling and cooling coils

AHU Heat Balance Simulator Cooling Coil Load Simulator — Sensible, Latent & Total Heat HVAC Thermal Load Calculator

Buildings and heat sources

Building Heat Loss Simulator - U-Value, R-Value & Heating Load Calculator Heat Pump & Refrigeration Cycle Calculator Heat Pump & Refrigeration COP Calculator — Carnot Cycle Efficiency Heat Pump Cycle Simulator — COP Calculation & p-h Diagram

Cooling towers and transient cooling

Cooling Tower Simulator (Merkel Method / NTU Method) Newton's Law of Cooling — Coffee Simulator

Related categories

Thermal & Energy Heat Exchanger, Fin, and Cooling Design Simulators Power Electronics and Electric-Power Simulators Hertz Contact and Contact Stress Simulators

FAQ

Why is psychrometrics important in HVAC?
Cooling, dehumidification, humidification, and outdoor-air treatment depend on humidity and enthalpy as well as temperature. Psychrometrics shows that state change directly.
Should sensible and latent loads be separated?
Yes. Sensible load changes temperature, while latent load removes moisture. Separating them helps size coils and diagnose comfort or dehumidification issues.
Are building load and equipment selection the same calculation?
Building load estimates the required capacity from envelope, weather, and internal gains. Equipment selection also checks part-load behavior, efficiency, and operating range.