The fire incorporates under-log burners to provide the most realistic effect, with a unique turndown feature allowing the rear burners to be turned off independently to keep the flame picture alive when running on low. This 22 appliance installs into any standard 16 x 22 back panel and is shrouded with an aluminium high definition stove trim, so its a perfect upgrade from your old 16 fire without changing the fireplace. Talk to your dealer for full details.