With the purchase of a select a select tankless water heater, receive a select whole house water filter for free. Limit one per household. Installation of both items required. Valid only at participating ARS®/Rescue Rooter® Network locations. Not valid for third party, new construction customers, with any other offers or discounts, or prior sales. Coupon required at time of service. Void if copied or transferred and where prohibited. See invoice for details. Any other use may constitute fraud. Cash value $.001. Expires 2/29/12.