Vermont Casting WinterWarm Fireplace Insert or System Chimney Connector, Sealing Requirements

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Flue

Collar

Glass

Door

B

A

B

 

C

 

United States

Canada

A. 16“

(410 mm)

18”

(457 mm)

B. 8” (203 mm)

8” (203 mm)

C. 40”

(1016 mm)

40”

(1016 mm)

NOTE: Measuring from the door opening of the insert to the fire- place opening adds 3¹⁄₂” (90mm) to the total depth of the hearth

protector.FP1086

Fig. 21 Unless your fireplace and hearth are constructed over a dirt floor (or unpainted concrete over dirt), you must use a floor protector that satisfies the above requirements.

The approved construction of a floor protector calls for 24 gauge galvanized sheet metal covered with a listed floor protector material that is at least 7/16” (11 mm) thick (such as Wonderboard® or Durock®). The floor protector may be covered with a noncombustible deco- rative material if desired. (Fig. 21)

Custom-made floor protectors may be used if they offer the same protection as the approved floor protector described in the preceding paragraph, which in testing was found to have a standard K value of 0.84. Custom- built floor protectors must have a K value equal to, or less than, 0.84, meaning that heat will transfer at the same rate or more slowly than the tested standard.

To calculate the thickness required for an alternate material to result in a K value of 0.84, first determine the alternate material’s K factor. This information should be available from your local building supply yard. Then, calculate the following formula:

(K factor

 

of alternate

 

material)

(Required thickness of

 

X (7/16" [11mm]) =

(0.84)

alternate material)

 

 

 

Let’s use brick as an example, since it is a commonly used hearth material. Its K factor is 5.0.

(5.0)

X (7/16" [11mm]) = 2.6" (65mm)

 

(0.84)

 

WinterWarm Fireplace Insert or System

That is, when using brick for the hearth extension, the brick must be a minimum of 2.6” (65 mm) thick.

Once you know the K factor of a given material, you can use this same formula to calculate its required thickness for approved hearth protection.

NOTE: Any floor protector thicker than 9/16” (14mm) will require elevating the firechamber on a solid, ap- proved floor protector to provide enough clearance for the door to open. This in turn will require a higher fire- place opening to permit installation of the fire chamber.

The Chimney Connector

Connect your WinterWarm Fireplace Insert to the chimney flue with a “positive flue connection.” Such a connection provides a direct passageway for smoke and exhaust gases leading from the flue collar of the WinterWarm to the first chimney lining tile. Positive flue connections are required in many areas before an installation can be approved.

The chimney connector itself should have a minimum cross-sectional area of 50 square inches (320 square centimeters), equivalent to an 8” (203 mm) diameter

opening, and must be 24 gauge or heavier.

Sealing Requirements

It is important to seal off the flue completely from the room air for proper operation of your WinterWarm. There are three ways to accomplish this:

1.Install a CFM Corporation Flex Connector system;

2.Install a customized seal at the damper level;

3.Have your chimney professionally re-lined and con- nect the liner directly to the WinterWarm.

Of these three choices, the Flex Connector not only provides an effective seal but usually is the easiest to install.

The Flex Connector System

The Flex Connector bends the chimney connector through angled smoke chambers and narrow damper frames, and its Block-off plate makes a tight seal at the damper frame. (Fig. 22)

To determine the suitability of the Flex Connector for your fireplace, carefully examine the fireplace damper area. The damper opening must be unobstructed and must measure at least 5” x 14” (127 x 356 mm) to accommodate the Flex Connector and the Block-off Plates. An undersized opening, or an opening obstruct- ed by heat exchanger tubes or damper components, may prevent the Flex Connector from extending up to the flue or may be possible only after special work has been done.

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Contents WinterWarm Introduction Table of ContentsWinterWarm SpecificationsDamper Section I OperationYour WinterWarm’s Controls What They Do Primary Air ControlFans Use the Air Control Settings That Work Best for YouBurn Only High-Quality Wood Starting and Maintaining a Wood Fire How To Build a Wood Fire Keep It GoingWinterWarm Control Settings High-Efficiency Wood Burning With Catalytic CombustionReloading and Reviving a Wood Fire Open-Fire Viewing With the Screen Cassette Special Tactics for Cold-Climate HeatingRemove and Store Ash Safely Care of the Porcelain Enamel Surface Section II MaintenanceCleaning the Glass Care of the Cast Iron SurfaceHow to Replace Gaskets Adjust the Door Latch PeriodicallyReplaceable WinterWarm Fiberglass Gaskets Permanent WinterWarm Gaskets Replacing the Door GasketsReplacing the Damper Gasket Replace Damaged Door Glass ImmediatelyCare of the Catalytic Combustor Adjust the Damper as NeededTry the Fine Adjustment First Use the Coarse Adjustment Only If NecessaryInspection and Removal of the Combustor When to Suspect a Combustor ProblemWatch for Better Results Clean Chimney System is Safer and Works BetterLearn to Recognize and Avoid Creosote Two Weeks WinterWarm Maintenance ScheduleYearly Spring Cleaning Fireplace DailyPH4 Large WinterWarm Wiring DiagramRequirements of your Existing Masonry Chimney Minimum Fireplace DimensionsSection III Preparing a Masonry Chimney Requirements for Existing Masonry FireplaceHearth Requirements Clearance RequirementsFireplace Maximums Flex Connector System Chimney ConnectorSealing Requirements Remove the Masonry Fireplace Damper Install the Flex ConnectorCustom Damper Seal Relined ChimneyReverse the Flue Collar If Necessary Install the Floor ProtectorSelecting a Location for Your Fireplace Section IV Installing the Fireplace System CabinetStructural Considerations Installation Chase Dimensions Carefully Observe Local Building CodesChimney Requirements Duct and Vent Placementfloor protector must satisfy these requirements Guidelines for an Outside Air SupplyImportant Reminders Flush with the Floor or Laid Over It?Customizing the Finished Appearance Electrical RequirementsChoosing a Facing Material Use the Right Adhesives Prepare and Install WinterWarm Cabinet 40³⁄ ₈ 1026mm Install the optional cabinet convection blower kit Install the elevated base. Slide the base intoCabinet convection blower in place behind Prepare and Install WinterWarm Firechamber Section V Completing the WinterWarm InstallationConnect the Outside Air Duct to the Air Box Fireplace System onlyPrepare and Install the WinterWarm Front Attach the Rheostat Rod Linkages Connect the WiringInstall the Air Divider Install and Adjust the ControlsMove the Entire Unit the final few inches into the Cabinet Install the Latticework PanelsInstall the Mantel Fireplace Systems only Install the PlinthWinterWarm Large Insert WinterWarm Large Insert Classic Sand Midnight Shell Enamel Parts WinterWarm Large Insert ModelAppendixApproved Chimney Components Appendix Catalytic Combustor Warranty CFM Corporation

WinterWarm Fireplace Insert or System specifications

The Vermont Casting WinterWarm fireplace insert is a remarkable addition to any home, delivering both efficiency and elegance to your living space. Designed to enhance heat delivery and overall ambiance, this insert is a popular choice among homeowners looking to create a warm and inviting atmosphere during the colder months.

One of the standout features of the WinterWarm insert is its efficient heating capability. With a remarkable heating capacity that can warm up to 2,000 square feet, this system transforms your drafty fireplace into a powerful heat source. The efficient design maximizes heat output while minimizing the amount of wood needed, ensuring you stay warm without emptying your wallet on heating costs.

The insert also incorporates advanced technology that promotes cleaner burning and reduced emissions. With its secondary combustion system, the WinterWarm optimizes the burn process, allowing for improved heat production and cleaner air. This feature not only benefits the environment but also extends the life of the unit, making it a sustainable choice for homeowners.

Aesthetically, the Vermont Casting WinterWarm insert doesn’t compromise on style. It is available in various finishes, including classic black and elegant enamel options, allowing homeowners to choose a unit that seamlessly blends with their home decor. The large viewing window provides a lovely view of the flames, enhancing the cozy feel of your room while adding a touch of sophistication.

The construction of the WinterWarm insert is another highlight. Made from durable cast iron, this unit is built to last, ensuring that it will provide warmth and comfort for many winters to come. The cast iron not only offers exceptional heat retention but also contributes to the timeless charm of the insert.

Additionally, the WinterWarm insert features an easy-to-use air control system, allowing you to adjust the burn rate and heat output quickly. This user-friendly design makes it accessible for everyone, whether you are a seasoned wood-burning enthusiast or new to the experience.

In summary, the Vermont Casting WinterWarm fireplace insert is an outstanding option for those looking to combine efficiency with style. With its powerful heating capabilities, advanced combustion technology, and elegant design, it transforms any standard fireplace into the heart of your home during winter months. This fireplace insert not only enhances indoor comfort but also adds a timeless element to your living space, making it a worthwhile investment for homeowners.
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