learn.howToCalculate
learn.whatIsHeading
Duct sizing balances airflow velocity, pressure drop, and cost. Proper sizing ensures system performance and efficiency.
단계별 가이드
- 1Use friction loss tables or duct calculators
- 2Recommended velocity: main ducts 4-6 m/s, branches 3-4 m/s
- 3Size ducts for <25 Pa/100m static pressure drop
풀어진 예시
입력
CFM 2500, round duct, 0.15 mmWG friction
결과
Diameter ≈ 500 mm for low-loss duct design
Provides good velocity
피해야 할 일반적인 실수
- ✕Using velocity too high (noise and friction)
- ✕Neglecting pressure drop from fittings and dampers
자주 묻는 질문
Why not use smallest possible ducts?
Small ducts have high velocity, high friction loss, and noise. Oversizing slightly saves fan energy.
How does duct insulation affect sizing?
Insulation doesn't affect sizing directly, but better insulation reduces equipment sizing needs.
계산할 준비가 되셨나요? 무료 Duct Sizing 계산기를 사용해 보세요
직접 시도해 보세요 →