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 & 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 A NEGATIVE 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 • ST-42TVFL-IPI • 455-902 Rev. C • 12/07

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Heat & Glo LifeStyle ST-42TVFL-IPI owner manual Step Negative Pressure Make-up Air
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ST-42TVFL-IPI specifications

The Heat & Glo LifeStyle ST-42TVFL-IPI is an innovative gas fireplace that combines style, efficiency, and cutting-edge technology to enhance any home. With its sleek design and modern features, this fireplace is perfect for those looking to create a cozy atmosphere while enjoying the benefits of a high-performance heating solution.

One of the standout features of the ST-42TVFL-IPI is its unique design. The fireplace boasts a large viewing area with a contemporary aesthetic, allowing for an unobstructed view of the flames. The expansive glass front not only adds to the visual appeal but also ensures optimal heat distribution throughout the space. The unit comes in several finishes, allowing homeowners to choose the perfect look that complements their interior design.

The ST-42TVFL-IPI operates with an innovative IntelliFire™ ignition system, which ensures a reliable start every time you need it. This system also offers on-demand heating, providing users the flexibility to heat their homes efficiently. The fireplace is designed with an adjustable flame height, giving users control over the intensity of the fire and the atmosphere it creates.

Energy efficiency is a hallmark of the Heat & Glo LifeStyle series, and the ST-42TVFL-IPI is no exception. With an impressive Efficiency Rating, this unit can efficiently heat large spaces, making it an ideal choice for both residential and light commercial applications. The fireplace uses direct vent technology, which minimizes heat loss and ensures that outdoor air is used for combustion, maximizing the heat output inside.

Additionally, the ST-42TVFL-IPI features an easy-to-use remote control that allows users to adjust settings conveniently from anywhere in the room. This modern convenience enhances user experience, allowing for effortless control over the fireplace’s operation.

Safety is paramount, and Heat & Glo prioritizes this with features such as a glass front that stays cool to the touch, reducing the risk of burns. The integrated safety shut-off system provides peace of mind, ensuring the fireplace is equipped to prevent any potential hazards.

In summary, the Heat & Glo LifeStyle ST-42TVFL-IPI is a sophisticated and efficient gas fireplace that offers homeowners a blend of modern design, advanced technology, and robust safety features. Its stylish appearance, along with energy-efficient heating capabilities, makes it a standout choice for anyone looking to enhance their living space.
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