Residential Texas customers in the Centerpoint Utility service area my enroll on XOOM Energy Texas, LLC's ComfortLock plan, which provides qualified customers with a free Sensi™ Wi-Fi Programmable Thermostat from Emerson that brings convenience and comfort to home heating and cooling. As a component of this product, you will; Receive a fixed price rate for 24 months -- the commodity rate on your bill will not change no matter the price of natural gas, oil and other power plant fuels. Have the ability to easily adjust heating and cooling levels as your life changes. Be enrolled in the Usage Optimizer program, during which XOOM Energy will be adjusting your thermostat to help you use energy more efficiently.* *You will be able to opt out of any adjustments that XOOM Energy initiates.