HVAC Technical Resources

Pressure-temperature tables for 15+ refrigerants including R410A, R454B, R32, R1234yf, R744 (CO2), and R717 (NH3). Low GWP alternatives included.

Interactive diagnostic flowchart to help identify and resolve common HVAC issues step by step.

Specifications for Kulthorn, Panasonic, Copeland, Danfoss, GMCC, and more with COP/EER and capacitor data.

Find replacement and alternative compressors. Search by model number to find compatible options from different brands.

Temperature controller specifications from Eliwell, Dixell, Danfoss, Carel. Wiring diagrams, parameters, and error codes.

Start and run capacitor sizing guide based on compressor horsepower.

Complete guide to refrigerant safety classifications. A1, A2L, A2, A3, B1, B2L explained with handling requirements and examples.

R-32 vs R-410A vs R-454B comparison. GWP, pressure, efficiency data for the 2025 refrigerant transition.

Refrigerant and compressor oil compatibility matrix. POE, PVE, PAG, and mineral oil selection guide.

ACR tubing sizes, wall thickness, pressure ratings, and Type K/L/M comparison. Brazing guidelines included.

AWG wire size chart with ampacity ratings, mm² equivalents, and voltage drop reference for HVAC wiring.

R-22 phase-out and replacement options. Compare R-407C, R-410A, R-32 with compatibility charts and procedures.

Visual troubleshooting guide for common HVAC problems. Pressure/temperature matrix, electrical testing, charge verification.

Diagnose thermostatic expansion valve problems. Stuck open, stuck closed, hunting, and restriction symptoms with solutions.

Error code database for VRF and mini-split inverter systems. Daikin, Mitsubishi, LG, Samsung, Gree, and Panasonic fault codes with solutions.