KINGERSONS - Your Millfield Browse online pages for buying for hvac technician certification ac maintainence, repair and new installations. Manuals and submittals sheets on central heat & air units we sell at split air conditioner unit (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 and air systems