The EffikaK© Milli-Damper'" MVG series millivolt damper is designed to increase the efficiency of gas-fired appliances using etectricity generated by the pilot burner 'lame and thermopile assembly. The Milli-Damper is constructed of stainless steel and is installed within the exhaust pipe system. Because the Milli-Damper is designed to operate on electricity generated by the appliance; no external electrical supply is required. The damper will substantially reduce standby heat losses on appliances such as water heaters and boilers.