Magnetic Fireplace Draft Stopper and Vent Cover insulation performance This magnetic draft stopper is designed to significantly reduce drafts from your chimney, helping to retain warmth in winter and keep spaces cooler in summer. It helps maintain a comfortable home environment yearround. Energy efficiency enhancement By preventing warm air from escaping and cold air from entering, this draft shield supports lower energy costs and more stable indoor temperatures. Reduced entry and indoor air quality The magnetic vent cover helps limit dust and debris from coming through the fireplace, contributing to a healthier living space for families. Easy magnetic attachment and fit Strong magnets provide effortless installation on any standard fireplace vent. It is easily removable when you need to use the fireplace, and you can trim the edge if for a snug fit. Compatibility and sizing Designed for standard fireplace vents; trim as needed to achieve a secure, snug fit. Use scenarios 1) Winter comfort: Install to reduce cold drafts around the chimney, keeping living areas warmer without compromising occasional fireplace use. 2) Summer cooling: Limit hot air entering from the chimney to help maintain cooler indoor temperatures. 3) Healthier living space: Use in households sensitive to dust; the cover helps reduce dust and debris entering through an idle fireplace.