Free duct cleaning valid with a duct sealing purchase. Normal business hours only. All coupons must be presented at time of service. Cannot combine with other discounts. Not valid on previous purchases. Existing residential only. Normal business hours only. Homeowner authorization needed. Must be in service area. Some restrictions apply. IN HVAC License #: H0010016  KY HVAC License #: HM01276   KY HVAC License # : HM05814   OH HVAC License #: HV48412  KY Plumbing License #: M5308   OH Plumbing License #: PL47812   IN Plumbing License #: CO50800249