Our most popular size of gas inserts, the Regency LRI4E Gas Insert typically fits up to 95% of existing masonry wood fireplaces. By adding a traditional gas insert you can seal your old drafty and inefficient wood fireplace in favor of a high-efficiency gas insert designed to provide a strong combination of convective and radiant heat. The LRI4E gas insert always includes a fan to help circulate warm air throughout your home, heating a larger area than with just radiant heat alone. As with all Regency products, our gas inserts all work during power outages and are all backed by the industry’s best and most comprehensive limited lifetime warranty.