Step 3

Negative

Pressure

Make-up Air

Negative Pressure warning: When negative pressure is present, an atmospherically vented fireplace (with a draft hood) may not function properly and it may down draft. In the case of a gas appliance, spillage of the combustion gases may occur. This may create a dangerous carbon monoxide situation in the house.

The causes of negative pressure to a house can include the following:

•Stack effect in the building.

•Exhaust only appliances (mechanically and atmospherically vented).

•Inadequate make-up air (which is increasingly more prevalent in new construction).

NOTE: This fireplace will operate correctly only if adequate ventilation is provided to allow proper draft to the fireplace system. Heat-N-Glo assumes no responsibility for the improper performance of the fireplace system caused by inadequate draft due to environmental conditions, down drafts, tight sealing construction of the structure, or mechanical exhausting devices which create a negative air pressure within the structure where the fireplace is located.

It is recommended that all natural venting non-air tight gas fireplaces have outside air connected to them. It is also recommended that the building be mechanically or passively balanced to allow atmospherically vented appliances, such as top vented gas fireplaces with draft hoods, to draft properly. If the home experiences negative pressure or is likely to experience negative pressure, connection to an outside air source is mandatory.

Installing Optional Outside Make-up Air: This unit is equipped to accept outside air. By using outside make- up air, the amount of room air used for combustion will be reduced. It is recommended that an AK-TV air kit be used with this appliance.

!WARNING: IN ANEGATIVE PRESSURE CONDITION (LIKELY TO OCCUR IN NEW HOMES THAT DO NOT HAVE ADEQUATE MAKE-UP AIR) THE OUTSIDE AIR KIT MUST BE INSTALLED TO OBTAIN PROPER PERFORMANCE AND TO HELP PREVENT SPILLAGE OF COMBUSTION GASES.

A 4-inch damper assembly (found in AK-TV Kit) must be installed to the fireplace. See Figure 5. Attach the damper assembly to the outer wrap of the fireplace using sheetmetal screws

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Heat & Glo LifeStyle st-42tvfl manual Step Negative Pressure Make-up Air
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st-42tvfl specifications

The Heat & Glo LifeStyle ST-42TVFL is a premier gas fireplace that seamlessly combines modern design with advanced technology, providing an optimal heating experience for homes. With its clean lines and stylish aesthetics, this fireplace not only serves as a functional source of warmth but also enhances the ambiance of any living space.

One of the standout features of the ST-42TVFL is its impressive viewing area. The large, front-facing glass provides an unobstructed view of the dancing flames, creating a focal point in the room that captivates and engages. The fireplace is equipped with a sleek, contemporary design, featuring a linear burner that produces a beautiful flame pattern, enhancing the visual appeal.

In terms of technology, the LifeStyle ST-42TVFL incorporates advanced Heat & Glo innovation with the IntelliFire touch ignition system, which allows for easy and reliable operation. This system ensures that the fireplace ignites efficiently with the simple push of a button, eliminating the need for matches or lighters. For added convenience, the fireplace can also be operated with a remote control, allowing users to adjust the flame height and turn the unit on or off from anywhere in the room.

The ST-42TVFL is designed with energy efficiency in mind. It boasts a direct venting system that draws air from the outside for combustion, ensuring that indoor air quality is maintained. This feature also maximizes heating efficiency, providing warmth without sacrificing comfort or safety. The fireplace has an impressive thermal efficiency rating, making it an eco-friendly choice for homeowners looking to reduce their carbon footprint while enjoying a cozy atmosphere.

Another noteworthy characteristic of the Heat & Glo LifeStyle ST-42TVFL is its customizable options. Users can select from a variety of interior finishes, media options, and decorative surrounds, allowing for personalized integration with any home decor. Whether a sleek modern design or a more traditional aesthetic is desired, this fireplace can be tailored to fit individual tastes.

In summary, the Heat & Glo LifeStyle ST-42TVFL gas fireplace is a sophisticated heating solution that offers a combination of style, efficiency, and advanced technology. Its expansive viewing area, intelligent ignition system, and customizable design make it a popular choice for homeowners seeking both form and function in their living spaces. With its focus on energy efficiency and user-friendly features, the ST-42TVFL stands out as an exceptional choice for enhancing any home.
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