KINGERSONS - Your Hockessin View deals on for heating and air technician repair, duct cleaning, installations and yearly maintenance. Manuals and submittals sheets on central heating & air we sell at split heating and air units (ductless type) delivered straight to your doorstep. Typical delivery time from distribution warehouse is 1-5 business days depending upon products ordered, quantity and location of the shipping address. window heat & air units