KINGERSONS - Your Islip Terrace Browse through discounted sale on for hvac companies heat and air furnace repair, maintenance and installations. Manuals and submittals sheets on central air and heating units we sell at split cooling and heating systems (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 heat unit