88-12 ROOSEVELT AVENUE JACKSON HEIGHTS,NY 11372

A small new building on a Queens commercial street: urgent care and consultation on the ground floor, imaging and offices above, and a cellar for storage and mechanical rooms. The CT room needs tight temperature and humidity control and the imaging rooms need ceilings, pipes and ducts coordinated with lead shielding, so the design had to stay compact and clash-free. It was designed to the NYC Construction Codes and the 2020 NYC Energy Conservation Code. Like every New York project, the design also has to satisfy the NYC Construction Codes and the city's energy code requirements.

Mechanical: we scheduled ventilation room by room for about 12,300 ft² of rooms, with the highest outdoor-air rate on first floor. Heating and cooling come from a VRF heat pump system of 3 outdoor units totalling about 38 tons and 31 indoor units, backed by 1 10-ton gas-fired rooftop unit and 1 energy-recovery ventilator. A dedicated 3-ton ducted unit holds the CT room at 72°F, and every duct and pipe penetration through the shielded walls is located and sleeved on the drawings. Electrical: we scheduled the power connection for every rooftop unit, VRF unit, fan, heater and pump — voltage, phase, minimum circuit ampacity and overcurrent protection — and sized the building service for the connected load. Plumbing: City water pressure is enough to serve the building directly, one 80-gallon gas-fired heater supplies hot water with recirculation, and a cellar sump handles floor drainage. Fire protection: a wet sprinkler system on a 4-inch combined sprinkler and standpipe riser fed directly from the city main, hydraulically calculated at about 380 gpm against the city hydrant test. We also prepared the COMcheck energy analysis, the backflow prevention applications and the mechanical, plumbing and sprinkler sets for filing.