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Electrical
- Power (Ohm’s Law & voltage drop) Last two of V/I/R/P/BTU · 80% wire + 3% safety
- Motor circuit (MCA, breaker, wire) Nameplate FLA/RLA/MCA/MOP · 15 A → #12
- VFD / motor starters Placeholder · 3φ caps · starters
- 3-Phase power NA / Europe voltages · kW / kVA
- Compressor load RLA/FLA · inrush display only
- Fan / blower motor FLA or HP path · MCA
- Defrost heater Watts or amps · MCA
- Refrigeration electrical load Sum loads · blank = zero
- Efficiency (COP, EER, kW/ton) Field ballpark, not rating plate
RefCalc (refrigeration)
- 1. Setup Zone · optional tons · discharge temp
- Temperature & pressure units °F/°C · PSIG/PSIA/kPa · Settings
- 2. Gauge Readings Pressures · line temp or SH/SC
- 3. Coil Airflow Evap/cond TD · air or water
- 4. Duct Measurements Sensible · VP · FPM · area sq.in.
- 5. Key Metrics SH/SC status after Run Diagnostic
- 6. Refrigerant NRE and refrigerant table path
- 7. Duct Airflow Results From duct measurements
- 8. Air and oil Coil temps · oil needs Setup discharge
- 9. Enthalpy Properties Hg / Hf / NRE
- 10. Vapor & Performance Density · performance indicators
- Formulas cheat sheet Coil TD · duct BTU / CFM / VP
- Save Log PDF · My Logs · Ask Grok
Air Flow
- 1. Sensible heat (BTU / CFM / L/s / ΔT) Same step as pressure · live sync · one CFM · ΔT °F↔°C
- 1. Pressure & velocity Same step as sensible · shared CFM · SA/RA · area sq.in.
- 1. Temp split (on Air Flow) RA/SA DB · ΔT keeps RA · SA = RA − ΔT
- 2. Fan Laws Affinity laws · speed changes
Sizing — Heat gain
- 1. Basics & Design Design conditions
- 2. Walls Construction · all orientations
- 3. Windows Optional · cardinal & diagonal
- 4. Doors Exterior doors
- 5. Roof & Floor Ceiling / attic · floor / slab
- 6. Other Gains People · equipment · allowances
- 7. Results Total cooling estimate
Sizing — Heat loss
- 1. Basics & Design Design temperatures
- 2. Walls & Windows Envelope conduction
- 3. Doors Exterior doors
- 4. Roof & Floor Ceiling · floor / foundation
- 5. Infiltration ACH outdoor air
- 6. Results Total heating estimate
Account
- Reload last session One device file · all tools · merge on step exit
- License, login & this device Does not expire · renew free · 5 devices
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