HVAC Load Calculation

Calculate heating and cooling loads using Manual J principles

Building Parameters

Floor Area (sq ft)

Ceiling Height (ft)

Total Window Area (sq ft)

Window Type

Number of Occupants

Wall R-Value

Design Outside Temp (°F)

Design Inside Temp (°F)

Load Calculation Results

Load Components

Envelope Load:1949 BTU/hrWindow Load:32700 BTU/hrInternal Gains:1800 BTU/hrVentilation Load:1490 BTU/hrLighting/Equipment:7000 BTU/hr

Total Cooling Load

44939 BTU/hr

3.74 tons

Total Heating Load

5739 BTU/hr

5.7 MBH

Design Loads (with 15% safety)

Cooling Design:51680 BTU/hrHeating Design:6600 BTU/hrVentilation:60 CFM

Note: This is a simplified calculation. For accurate sizing, perform a full Manual J calculation considering all building components and local climate data.