Cooling Load Check Figures Ashrae Pdf [LATEST]

The 400 sq ft/ton Rule is Dead: How to Use ASHRAE Fundamentals to Sanity Check Your Cooling Loads

These tables provide (or Btu/h·ft²) ranges for total cooling loads based on building type and glazing percentage.

We’ve all been there. You’ve spent three hours inputting walls, windows, roofs, and internal loads into your HAP, Trace, or IESVE model. The software spits out a number: 124.7 kW (35.6 tons) . cooling load check figures ashrae pdf

Suppose your calculation came back at 90 W/m² for a retail store (ASHRAE range 150–250). You are 50% low . Something is wrong.

But does that feel right?

Let’s look at how to use the cooling load check figures to validate your model in under 10 minutes.

Open your ASHRAE Handbook—Fundamentals. In the current edition (2021/2025), Chapter 18 (Nonresidential Cooling and Heating Load) contains the gold mine: Table 9 & 10 , typically titled “Cooling Load Check Figures for Typical Commercial Buildings.” The 400 sq ft/ton Rule is Dead: How

“ASHRAE Cooling Load Check Sheet (PDF)” – A one-page checklist comparing W/m² for 12 building types. (Note: Create this as a lead magnet or internal tool.) Author Note: Always refer to the current ASHRAE Handbook—Fundamentals for official tables. Values cited here are for educational illustration of the methodology.

Stop using 400 ft²/ton (which equals ~85 W/m²). That ignores windows, people, and latitude. The software spits out a number: 124