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/ Lyemance Original
Please choose one of products below...

$124.50 - 8 x 8 Lyemance Original... top sealing chimney damper. Shipping Included.
$127.50 - 9 x 13 Lyemance Original... top sealing chimney damper. Shipping Included.
$138.50 - 8 x 17 Lyemance Original... top sealing chimney damper. Shipping Included.
$127.75 - 13 x 13 Lyemance Original... top sealing chimney damper. Shipping Included.
$145.75 - 12 x 16 Lyemance Original... top sealing chimney damper. Shipping Included.
$155.75 - 13 x 18 Lyemance Original... top sealing chimney damper. Shipping Included.
$178.50 - 17 x 17 Lyemance Original... top sealing chimney damper. Shipping Included.
$128.50 - 12 Round Lyemance Original... top sealing chimney damper. Shipping Included.

Free Shipping on Lyemance dampers. (Lower 48 states only. Ships UPS ground)

Lyemance Chimney Damper Lyemance Chimney Damper Lyemance Chimney Damper
Side view
Open Position
Top View
Open Position
What you get
Stock Sizes Fits inside flue sizes
8" x 8" 6" 1/2 x 6 1/2" to 8 1/2" x 8 1/2"
9" x 13" 6" 1/4 x 11" to 8 1/8" x 12 1/8"
8" x 17" 5 3/4" x 14 1/4" to 8 1/4" x 16 1/2"
12" x 16" 9 1/4" x 12 3/4" to 12" x 15"
13" x 13" 10" x 10" to 12 1/2" x 12 1/2"
13" x 18" 10" x 15 1/2" to 12 1/2" x 17 1/2"
17" x 17" 15" x 15" to 17 1/2" x 17 1/2"
12" ROUND !!!! 10 5/8" to 11 3/8"

Sizing for a Lyemance Original damper
Masonry, brick or clay liners need to be measured by its INSIDE measurement.

Older "clay" liners and newer ceramic liners will vary in their inner and outer measurements.

Typically... a standard size 8x12 clay liner, sometimes called a 9x13, will have an inner measurement of approximately 6 x 10 to as big as 7 x 11 1/2".

Measure and give us a call if you would like help sizing for a Lyemance Original damper.


Made to fit clay or terracotta flues

Always measure the inside & outside of the flue tile side to side, never corner to corner.

Fits square or rectangular flues with "rounded" corners Will not work on oval flue liners

ADD a Cable Shield for $20** or Lyemance ORIGINAL 50' Cable for only $22**

COMBO SPECIAL pricing valid ONLY on purchases of a Cable Shield or Cable AND Lyemance Damper


Click to see a custom installation Click for a short video Red, silicone rubber gasket under Lyemance lid seals tightly to eliminate draft
Lyemance's rubber gasket seals tightly like a storm door for your fireplace, and keeps heating and cooling dollars where they should be...in your home.

Lyemance mounts on top of your chimney to keep out animals and rain.

Lyemance easily operates from inside your firebox and seals tight every time you close it—eliminating any draft.

Tug on the handle, it's open and with another tug, it's closed.

The Lock-Top Fireplace damper opens and closes easily with this handle mounted in your firebox
50' extension cables for longer chimney runs available.

Proven dependability and number one selling damper for over 18 years. The LyemanceTM Original Top Sealing Fireplace Damper reduces heat and air conditioning loss, and eliminates down drafts when fireplace is not in use.

Seals out sleet and snow and rain. Keeps out birds, animals and debris. Reduces outside noise.

The lid on the damper is spring loaded in the normally open position. It is shut by means of a stainless-steel cable that extends through the cable guide then down the flue to the firebox, where it is secured to a bracket fastened into a forward part of the side fireplace wall.

The Original can be installed on chimney tops in minutes, used with new or existing fireplaces. No special tools are required. Dampers are available in sizes to fit most standard flue liners, including round.

The low profile Original blends into the roof line. Each damper is completely assembled with a 32 foot stainless-steel cable and a tube of silicone sealant to bond the damper to the flue tile. Flue liner dimensions may vary 1 inch.

The LyemanceTM Original Damper is durably constructed of cast aluminum, so it won't rust or warp (unlike cast iron throat dampers), and fully guaranteed for material and workmanship.

The Original is much less expensive than repairing existing throat dampers.