Multi-Function Systems use a small electronically generated spark to ignite the burner. This eliminates the standing pilot, which saves about 800 BTU/Hour on a direct vent system.
Because they can operate with battery backup, multi-function systems can provide heat during a poweroutage.
Multi-function systems include their own remote controls. Available on some direct-vend fireplaces andvent-free burners (FQ-VFSV).