How do I choose an energy strategy for an attic suite: extend existing ducts or install a dedicated heat pump?
Start with the Envelope and Loads Tighten the roofline (air sealing + code-level insulation) and run a room-by-room load calculation. If the main system has capacity, a short, well-sealed extension can work; but many NYC homes benefit from a dedicated variable-speed heat pump (ductless or slim-duct) for precise zoning, dehumidification, and quiet operation. When a...
