KINGERSONS - Your Londonderry Search and browse through deals on for hvac mechanical contractors ac and heat pump repair, installations and repairs. Manuals and submittals sheets on central heating and cooling we sell at split air conditioner 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 air conditioner heat pump