Gas Fireplace Covers For Draft

Gas Fireplace Covers for Draft

Gas fireplaces are a popular amenity in many homes, offering supplemental heat and aesthetic appeal. However, a common issue is the presence of drafts emanating from the fireplace when it is not in use. These drafts can significantly impact the energy efficiency of a home, making it colder in the winter and potentially raising heating costs. The use of gas fireplace covers, also known as fireplace draft stoppers or fireplace plugs, is a practical solution to mitigate these drafts. These covers are designed to create a barrier, effectively sealing off the fireplace opening and preventing cold air from entering the living space.

Understanding the mechanism behind fireplace drafts is crucial to appreciating the effectiveness of fireplace covers. Traditional chimneys are designed to create an updraft when the fireplace is in use, drawing smoke and combustion gases out of the house. This updraft is due to the temperature difference between the warm air inside the chimney and the cooler air outside. However, when the fireplace is not in operation, this temperature differential reverses. The air within the chimney becomes cooler than the air inside the house, leading to a downdraft. This downdraft carries cold air from outside down the chimney and into the room through the fireplace opening. This is further exacerbated by the stack effect, where warm air rises inside a building, creating a negative pressure that draws air in from the lowest openings, including the fireplace.

The effectiveness of a gas fireplace cover depends on several factors, including its material, design, and proper installation. A tightly sealed cover will prevent air leakage, while a poorly fitted or damaged cover will be less effective. Regular inspection and maintenance of the cover are essential to ensure its continued performance. Choosing the right type of cover depends on the specific dimensions and design of the fireplace opening. A cover that is too small will not provide an adequate seal, while a cover that is too large may be difficult to install and remove.

Why Gas Fireplaces Experience Drafts

Several factors contribute to the phenomenon of drafts in gas fireplaces. The chimney itself acts as a conduit for air movement. As previously mentioned, the stack effect creates a pressure differential, pulling air into the home through any available opening. Gas fireplaces, while designed to vent combustion byproducts efficiently, also create an open pathway to the outside when not in use. This open pathway allows cold air from the chimney to enter the living space.

The design of the damper, or lack thereof, plays a significant role. Many modern gas fireplaces are designed without traditional dampers, relying instead on a direct vent system. While this system is safer during operation, it still allows for air exchange when the fireplace is off. Older gas fireplaces may have dampers, but these dampers are often not airtight and may not seal properly after years of use. Gaps and cracks around the damper can allow significant amounts of air to pass through.

Another factor is the outdoor climate. During windy conditions, the wind can create a pressure differential at the top of the chimney, forcing air down into the fireplace. This effect is more pronounced in areas with high winds or taller chimneys. The temperature difference between the inside and outside air also contributes to drafts. A larger temperature difference will result in a stronger downdraft.

Furthermore, general air leaks in the home can exacerbate the problem. Poorly sealed windows, doors, and other openings can create a negative pressure that draws air in through the fireplace. Addressing these other air leaks can help to reduce the severity of fireplace drafts.

Types of Gas Fireplace Covers

A variety of gas fireplace covers are available, each designed to address the issue of drafts in a specific way. The most common types include inflatable plugs, magnetic covers, foam inserts, and custom-made covers.

Inflatable fireplace plugs are made of durable PVC or similar material and are inflated with air to create a tight seal. These plugs are typically inserted into the fireplace opening and then inflated using a hand pump or an electric air pump. The inflation process expands the plug to fit snugly against the fireplace walls, preventing air from entering or exiting. Inflatable plugs are versatile and can be used in various fireplace sizes and shapes. However, they require periodic reinflation as the air pressure can decrease over time. It's important to avoid over-inflation, as this can damage the plug or the fireplace itself.

Magnetic fireplace covers are designed for fireplaces with metal surrounds or doors. These covers utilize strong magnets to adhere to the metal surface, creating a seal around the opening. Magnetic covers are easy to install and remove, making them a convenient option for occasional use. However, their effectiveness depends on the strength of the magnets and the flatness of the metal surface. They may not be suitable for fireplaces with uneven or non-metallic surfaces.

Foam fireplace inserts are made from dense foam material that is cut or molded to fit the fireplace opening. These inserts are typically placed inside the fireplace to block airflow. Foam inserts are relatively inexpensive and easy to use, but they may not provide as tight of a seal as inflatable plugs or magnetic covers. They can also be susceptible to damage from heat or sharp objects.

Custom-made fireplace covers are designed to fit the specific dimensions and shape of a particular fireplace. These covers are often made from durable materials such as metal or wood and can be designed to match the aesthetic of the room. Custom-made covers offer the best fit and seal, but they are typically more expensive than other options. They require precise measurements and may need to be professionally installed.

Selecting and Installing a Gas Fireplace Cover

Choosing the right gas fireplace cover involves considering several factors, including the fireplace's dimensions, the type of fireplace, and the desired level of insulation. Proper installation is equally important to ensure the cover's effectiveness.

Before purchasing a fireplace cover, it is essential to accurately measure the dimensions of the fireplace opening. This includes the width, height, and depth of the opening. If the fireplace has an irregular shape, it may be necessary to create a template or use a flexible measuring tool to obtain accurate measurements. These measurements will help to determine the appropriate size and shape of the cover.

The type of fireplace also influences the choice of cover. For fireplaces with metal surrounds or doors, magnetic covers may be a suitable option. For fireplaces with irregular shapes or sizes, inflatable plugs or custom-made covers may be more appropriate. The material of the fireplace surround should also be considered, as some materials may not be compatible with certain types of covers.

The desired level of insulation is another important consideration. If the primary goal is to block drafts, a simple foam insert or inflatable plug may suffice. However, if the goal is to provide additional insulation and reduce energy loss, a thicker, more durable cover may be necessary. Some covers are designed with insulating materials to provide enhanced thermal performance.

Installation instructions vary depending on the type of cover. Inflatable plugs typically require inflation with a hand pump or an electric air pump. Magnetic covers simply attach to the metal surface. Foam inserts are typically placed inside the fireplace opening and may require trimming to fit properly. Custom-made covers may require professional installation. It is important to carefully follow the manufacturer's instructions to ensure proper installation and avoid damaging the cover or the fireplace.

Regular inspection and maintenance of the fireplace cover are essential to ensure its continued performance. Check for any signs of damage, such as tears, cracks, or leaks. Clean the cover regularly to remove dust and debris. Replace the cover if it becomes damaged or ineffective. Inspect the seal around the cover to ensure that it is tight and airtight. Addressing any issues promptly will help to maintain the cover's effectiveness and prevent drafts.

Beyond solely addressing drafts, fireplace covers present a safety measure to keep children and pets from entering the fireplace when not in use. This is especially important for fireplaces with exposed gas lines or other potentially hazardous components. A properly installed cover can act as a barrier, preventing accidental injuries or tampering.

Considerations around proper ventilation remain paramount. It is crucial to remove the fireplace cover before operating the gas fireplace. Operating a gas fireplace with the cover in place can lead to a dangerous buildup of carbon monoxide and other gases. Always prioritize safety and follow the manufacturer's instructions for both the fireplace and the cover.