IMPROVED INSULATION: This magnetic fireplace draft cover works to eliminate winter weather drafts, keeping unwanted cold air out of your home to prevent heat loss. During summer, this fireplace vent cover can be used to keep hot and humid air out. This fireplace draft blocker ensures your chimney isn't a source of unwanted cold or hot air. EFFICIENT: This draft shield vent cover improves energy efficiency thus allowing you to save money on your monthly utility bills. Even when there's no active fire, your chimney will continue to generate a draft which can lead to warm air being sucked out of your home and being replaced by colder air from the outside. Our fireplace blocker acts as the perfect solution to this common nuisance. HELPS ALLERGIES: This magnetic vent cover is the perfect draft guard to reduce pesky and unwanted pollen and dust from entering your home through the fireplace. Great for a wood-burning or gas fireplace, our fireplace cover for winter and summer is the perfect