KINGERSONS - Your Frelinghuysen Read details and browse to buy for looking for hvac subcontractors heat and air furnace repair, maintenance and installations. Buyer's guide on central air units we sell at split air and heating system (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