Heatcraft H-ENGM0408 Commercial Refrigeration Load Calculations Reference Guide

About this manual

This engineering manual provides formulas, tables and sample calculations for determining the heat load of commercial refrigeration rooms and freezers. It covers transmission load, air‑change load, miscellaneous loads and product load, and shows how to apply safety factors.

The guide includes quick‑selection charts, a rapid load calculator for large units, and detailed load‑estimation forms (Bulletin Above32‑05 and Below32‑05) to help engineers select appropriate refrigeration equipment.

What's inside

• Job Survey
• Refrigeration Load Calculations
• Sample Calculations
• Refrigeration Equipment Selection
• Derating Factors
• General Guidelines
• Psychrometric Chart
• Quick Selection Guide
• Rapid Load Calculator for Large Coolers & Freezers

Frequently asked questions

What is the recommended minimum slab temperature for freezer applications?

The minimum slab temperature should be at least 40 °F, and normally 55 °F is used for freezer applications.