A wind baffle is a protective barrier used in HVAC systems, roofing, fireplaces, or outdoor equipment to control airflow and block unwanted wind intrusion. Its exact purpose depends on where it’s installed.
What it does:
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Installed between roof rafters near soffit vents
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Keeps insulation from blocking airflow
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Maintains proper attic ventilation
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Prevents wind from blowing insulation away from the eaves
Why it matters:
Without a wind baffle:
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Insulation can clog soffit vents
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Moisture buildup can occur
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Roof decking can rot
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HVAC efficiency drops
Also called:
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Vent baffle
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Insulation baffle
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Rafter vent
Wind Baffle in HVAC Equipment (Outdoor Units)
What it does:
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Shields outdoor condensers or heat pumps from strong winds
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Prevents airflow disruption in cold climates
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Helps maintain proper refrigerant pressures
Why it matters:
In cold or high-wind areas:
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Strong wind can cause low head pressure
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Heat pumps may trip on safety controls
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Defrost cycles can be affected
Often used with:
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Low ambient kits
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Commercial rooftop units
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Heat pumps in exposed locations
Wind Baffle in Fireplaces / Chimneys
What it does:
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Prevents downdrafts caused by wind
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Improves chimney draft
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Reduces smoke blowback into the room
Simple Definition
A wind baffle is a device that:
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Controls airflow
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Protects from wind disruption
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Improves system performance and efficiency
