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-225 air kit be used with this appliance.

!WARNING: IN A NEGATIVE PRESSURE CON- DITION (LIKELY TO OCCUR IN NEW HOMES

THAT DO NOT HAVEADEQUATE MAKE-UPAIR) THE OUTSIDE AIR KIT MUST BE INSTALLED TO OB- TAIN PROPER PERFORMANCE AND TO HELP PRE- VENT SPILLAGE OF COMBUSTION GASES.

A4-inch side collar and a 4-inch flexible air duct must be installed to the outer wrap of the fireplace. See Figure 4. After removing and discarding the outside air cover plate attach the side collar to the outer wrap of the fireplace using sheetmetal screws. Attach one end of the flex duct to the side collar and the other end of the duct to the termination cap. Use plastic tie straps to secure the ends of the flex duct to the collar.

Detailed installation instructions for Model AK-225 Outside Air kit are found in the kit. This kit cannot be used in Canada.

OUTSIDE AIR

COLLAR

AIR DUCT

OUTSIDE AIR

COVER PLATE

Figure 4. Make-up Air

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Heat & Glo LifeStyle ST-38GTV manual Negative Pressure Make-up Air
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ST-38GTV specifications

The Heat & Glo LifeStyle ST-38GTV is an exceptional gas fireplace that epitomizes modern design and advanced technology, making it an ideal addition to contemporary homes. This stunning model combines aesthetic appeal with functional efficiency, allowing homeowners to enjoy the beauty of a live flame while benefiting from the convenience of gas heating.

One of the standout features of the ST-38GTV is its expansive viewing area. With a large, contemporary glass front, it offers an unobstructed view of the flames, creating a warm and inviting ambiance. The stylish design complements various interior styles, ranging from sleek modern homes to more traditional settings.

A significant technological advancement in the LifeStyle ST-38GTV is the use of advanced venting options. This model is designed with versatility in mind, allowing for both direct vent and vent-free configurations. This flexibility ensures that it can be installed in a variety of locations within a home, providing homeowners with the freedom to enhance any space with warmth and charm.

Moreover, the ST-38GTV incorporates Heat & Glo’s proprietary IntelliFire™ Ignition System. This innovative feature allows for easy operation and increased safety by ensuring that the fireplace ignites reliably at the push of a button. The IntelliFire™ system also includes a remote control option, allowing users to adjust the flame height and heat output from the comfort of their favorite chair.

Additionally, the fireplace comes equipped with a range of customizable options. Homeowners can choose from various media options, including traditional logs or contemporary glass, to create a personalized look that suits their style. The customizable trim and surround also allow for further creativity in integrating the fireplace into the existing decor.

Another important characteristic of the LifeStyle ST-38GTV is its energy efficiency. With high-efficiency ratings, it not only provides substantial heat output but also minimizes energy consumption, contributing to eco-friendly living practices. This efficiency ensures that homeowners can enjoy the warmth and comfort of their fireplace without an excessive increase in energy costs.

In conclusion, the Heat & Glo LifeStyle ST-38GTV is a perfect blend of style, technology, and efficiency. With its large viewing area, advanced ignition system, customizable options, and environmentally friendly design, it represents a remarkable choice for anyone looking to elevate their living space with a luxurious focal point that offers the warmth of a traditional fireplace while embracing modern innovation.
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