Broan 636 Steel Roof Cap for 3 in or 4 in Round Duct, Black

Broan 636 is a black steel roof cap for exhaust fan duct runs that need a 3 in or 4 in round roof termination. This draft is keyed to exact model 636 and SRS item BROABV, with market-based pricing from an exact public retail comp.

Key Specs

• Brand: Broan-NuTone
• Model / MPN: 636
• SRS item code: BROABV
• Duct compatibility: 3 in or 4 in round duct
• Material: Steel
• Color: Black
• Use: Bathroom, rec room, home gym, and similar exhaust fan roof termination
• Sell unit: Each
• Value pack quantity: 1

Coverage & How Much You Need

Order one roof cap per compatible exhaust duct termination. Include separate ducting, fasteners, flashing, sealant, and roof-system accessories required by the installation.

Compatibility / Fitment

Use only where the exhaust fan and duct system call for a 3 in or 4 in round roof cap. Verify code, duct routing, backdraft damper needs, roof material, and weatherproof flashing details before substituting for another termination.

FAQs

How do I confirm this is the right Broan cap?

Match the Broan/NuTone model 636 and the 3 in or 4 in round-duct roof-cap requirement before ordering.

What duct sizes does it fit?

It is designed for 3 in or 4 in round duct applications. Verify the fan outlet, duct run, and roof penetration before purchase.

Is this a roof vent or wall cap?

This is a roof cap/roof vent termination for round duct. Do not substitute it for a sidewall cap unless the installation documents allow it.

What should be checked before installation?

Confirm roof slope, flashing method, duct size, local code, damper orientation, and weatherproof sealing details.

Is this a multi-pack?

No. This draft is for one Broan/NuTone 636 roof cap sell unit. Any carton multiples are separate fulfillment/order-multiple constraints.

Roof penetration work involves fall hazards and water-intrusion risk. Follow the fan manufacturer instructions, local code, and proper roof flashing/sealant practices.

Product Expert Notes

Good draft canary candidate because identity is simple, the exact model has public exact-comp evidence, source images are real on-product assets, and Shopify has no exact SKU/barcode hit. Keep inactive until canary approval.