The Napoleon Fiberglow VF24 Vent Free Gas Log Set installs into any opening, existing or new, with ease, using the gas lines you already have. Perfect for a home where fireplaces weren’t an option before. The Fiberglow VF24 doesn’t need a chimney to work. It uses the air currents in your home to feed and ventilate itself, making it 99.9 percent efficient. Enjoy the warmth and look of a real wood fire without any of the effort. A Gas Log Set is a less expensive way to add a beautiful fire to your home. Easily update a space with the addition of a Fiberglow VF24.