We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black powder-coated steel roof cap, 11 in square, 4 3/8 in high, built-in damper and bird screen

Broan-NuTone, LLC

Broan-NuTone, LLC 636 Roof Cap Thermostat Black

SKU CH-X5PM-ZJCN1

A roof cap with built-in backdraft damper and bird screen for 3 in or 4 in duct

  • TypeLearning Thermostats
  • ColorBlack
  • Built-in damper prevents backdrafts for cleaner airflow
  • Powder-coat finish resists corrosion in harsh weather
  • Bird screen blocks pests from entering ductwork
  • Fits 3 in and 4 in nominal duct sizes
  • Steel construction at 25 ga thickness ensures durability

Product identity

The Broan-NuTone 636 roof cap provides a weather-resistant termination for round duct runs in residential ventilation systems. Its powder-coated steel body and built-in backdraft damper suit installers who need a durable, low-profile exhaust outlet.

Installation checks

Verify that the existing ductwork matches the nominal 3 in or 4 in diameter before ordering. Confirm the roof pitch and flashing method are compatible with the 11 in overall width and 4 3/8 in height. Ensure the mounting surface can accept the supplied fasteners and that local code permits this termination style.

Build and daily use

The 25 ga steel construction with powder-coat finish resists corrosion and retains its black colour through seasonal exposure. An integrated bird screen blocks debris without restricting airflow, while the internal damper closes automatically when the fan stops to reduce heat loss and backdrafts.

Highlights

  • Built-in damper prevents backdrafts for cleaner airflow
  • Powder-coat finish resists corrosion in harsh weather
  • Bird screen blocks pests from entering ductwork
  • Fits 3 in and 4 in nominal duct sizes
  • Steel construction at 25 ga thickness ensures durability

Specifications

BrandBROAN
TypeLearning Thermostats
ColorBlack

Questions about this item

What comes with the BROAN-NUTONE 636 roof cap and what must be purchased separately?

The unit includes a built-in backdraft damper and a protective bird screen; ducting and mounting hardware are not included and must be sourced separately.

Which duct diameter should I choose for the 636 roof cap?

The cap fits nominal 3 in or 4 in round duct, so select the size that matches your existing ductwork.

What does the 11 in overall width mean for installation on my roof?

The 11 in square base and 4 3/8 in height determine the flashing cut-out and clearance needed above the roof deck.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.