Hvac Calculator
HVAC Calculator
计算 heating and cooling loads, duct sizing, and equipment requirements
HVAC Load Analysis
计算结果
HVAC Calculations
Step-by-Step Solution
Specifications
Equipment Recommendations
Enter HVAC specifications to calculate requirements
Quick HVAC Examples
HVAC System Guide
Load Factors
Residential: 400-600 BTU/sq ft
Cooling load per square foot
Cooling load per square foot
Commercial: 300-800 BTU/sq ft
Varies by building type
Varies by building type
Occupants: 400 BTU/person
Heat gain from people
Heat gain from people
Duct Sizing
Round Duct: 0.785 × diameter²
Cross-sectional area formula
Cross-sectional area formula
Air Velocity: 700-900 FPM
Recommended for residential
Recommended for residential
CFM per Ton: 400 CFM
Standard air flow rate
Standard air flow rate
Equipment Sizing
1 Ton: 12,000 BTU/hr
Standard cooling capacity
Standard cooling capacity
Oversizing: 10-20% maximum
Prevents short cycling
Prevents short cycling
SEER Rating: 14+ recommended
Energy efficiency standard
Energy efficiency standard
仅供教育目的。请咨询合格的专业人士获取财务或医疗建议。
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