KINGERSONS - Your Grayson Browse through cyber deals on for hvac service technician repair, duct cleaning, installations and yearly maintenance. Manuals and submittals sheets on central cooling and heating systems we sell at split heat and air conditioning (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 air and heating units