The AskHVAC.ca Blog

Practical guides, sizing walkthroughs, and compliance updates for Canadian HVAC contractors, engineers, and homeowners. Written to complement the calculators, not replace them.

Refrigeration • How-To

How to Size a Cascade Refrigeration System

Why two loops beat one at ultra-low temperatures, how cascade heat exchanger duty is actually calculated, and a full worked example using real numbers.

July 23, 2026 • 7 min read