Heat Exchanger Calculator: LMTD, NTU, Shell-and-Tube & Plate
Wired White v2 Size or rate shell-and-tube and plate heat exchangers with calculated LMTD correction, NTU effectiveness, Kern and Martin estimates, and temperature profiles.
Thermal
Heat and air: psychrometrics and HVAC processes on the chart, duct sizing with fan curves, pipe pressure drop and pump sizing, and the junction temperature of a power semiconductor under steady and pulsed load. Each calc shows its method and published sources.
Wired White v2 
Walk-In Cooler & Cold Room Load Calculator
Wired White v2 Size walk-in cold room refrigeration from insulation, humid-air door openings, product cooling, respiration and defrost. Compare daily duty with peak pull-down capacity.
Psychrometric Chart Calculator: Air States and HVAC Processes
Wired White v2 Solve moist-air states from two independent properties and plot HVAC processes. Calculate coil duty, air mixing, humidification and condensate at your site pressure.
Duct Size Calculator and HVAC Fan Curve
Wired White v2 Size a five-segment duct tree by equal friction, calculate fitting and balancing losses, and match the system to a blower curve. Supports round and rectangular ducts.
Pipe Pressure Drop and Pump Sizing Calculator
Wired White v2 Calculate pipe pressure drop, pump head, shaft power and NPSHa with Darcy–Weisbach. Compare system and pump curves using Colebrook or Swamee–Jain friction factors.
Junction temperature of a power semiconductor
Wired White v1 Estimate steady-state junction, case, and sink temperatures and a single-pulse junction rise from a four-term Foster model.