KINGERSONS - Your Rock City Falls Flip through several deals on for hvac service companies heat and air furnace repair, maintenance and installations. Manuals and submittals sheets on central air and heat unit we sell at split ac and heat 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