KINGERSONS - Your Landover Hills Browse through hot deals on for furnace repair technician repair, duct cleaning, installations and yearly maintenance. Manuals and submittals sheets on central heat & air units we sell at split heat & 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 and air conditioning