Controls and options for direct-vent fireplaces vary from one manufacturer to the next.
Some models have a standing safety pilot light that burns continuously to light the main burner whenever the gas is turned on.

Others have electric spark ignition to save energy or a piezoelectric ignition, often chosen when there isn't an electrical hookup at the fireplace. Some of these types use a millivolt generator so the fireplace can operate even if the power goes out.

But if the pilot isn't lit, the main gas valve won't open. In fact, Blaze King's Split Second(tm) Safety System shuts off the gas within one second if the pilot light goes out.

You can use a wall switch, a thermostator, or a remote control to operate many types of direct-vent systems. Some remote controls have adjustable thermostats, blower-speed controls, and flame-height adjustments.

Other options for direct-vent fireplaces include variable-speed fans to boost circulation, special trim kits, propane gas conversion kits, decorative screens, firebrick-style fireboxes, and more.