A household appliance including a housing, a processing chamber for receiving items (20, 28) to be processed, a process air conditioner configured for providing a process air flow conditioned for processing the items (20, 28), a process air guide for guiding the process air flow between said process air conditioner and said processing chamber, and a control unit for controlling operation of said household appliance; said processing chamber, said process air conditioner, said process air guide, and said control unit, disposed in said housing; said process air guide including at least one duct (8, 9) connected between said process air conditioner and said processing chamber and disposed in said housing; and said control unit configured to selectively execute at least two operational processes for processing the items (20, 28), said at least two operational processes comprising a first operational process which includes guiding the process air flow through said process air guide, and a second operational process which excludes guiding the process air flow through said process air guide; wherein said at least one duct (8, 9) is inflatable and deflatable; and flow control means (10, 11, 12) are disposed in said process air guide and configured for inflating said at least one duct (8, 9) during said first operational process, and for deflating said at least one duct (8, 9) during said second operational process, characterized in that said at least one duct (8, 9) comprises a first duct and a second duct, wherein said first duct, said processing chamber and said second duct are connected in sequence to each other; said flow control means (10, 11, 12) comprise at least one process air blower disposed in said process air guide upstream of the first duct and the second duct and configured for driving the process air flow through said process air guide, and at least one of at least one pressure balancer connecting said process air guide downstream of the first duct and the second duct to an ambient of said process air guide, and at least one throttle disposed in said process air guide downstream of the first duct and the second duct. said processing chamber, said process air conditioner, said process air guide, and said control unit, disposed in said housing; said process air guide including at least one duct (8, 9) connected between said process air conditioner and said processing chamber and disposed in said housing; and said control unit configured to selectively execute at least two operational processes for processing the items (20, 28), said at least two operational processes comprising a first operational process which includes guiding the process air flow through said process air guide, and a second operational process which excludes guiding the process air flow through said process air guide; wherein said at least one duct (8, 9) is inflatable and deflatable; and flow control means (10, 11, 12) are disposed in said process air guide and configured for inflating said at least one duct (8, 9) during said first operational process, and for deflating said at least one duct (8, 9) during said second operational process, characterized in that said at least one duct (8, 9) comprises a first duct and a second duct, wherein said first duct, said processing chamber and said second duct are connected in sequence to each other; said flow control means (10, 11, 12) comprise at least one process air blower disposed in said process air guide upstream of the first duct and the second duct and configured for driving the process air flow through said process air guide, and at least one of at least one pressure balancer connecting said process air guide downstream of the first duct and the second duct to an ambient of said process air guide, and at least one throttle disposed in said process air guide downstream of the first duct and the second duct.