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Case Studies

Case Studies

Case Studies

HVAC retrofit engineering and execution for NYC facilities where airflow continuity is non-negotiable. Critical environments. Real field results.


Before and after comparison of an outdated rooftop HVAC unit and a newly installed replacement following rooftop retrofit at Kings County Hospital.
Kings County Hospital: 30-Ton Rooftop Unit Retrofit Completed Live in 7 hrs
Before and after comparison of an aging chilled-water coil section and a newly installed aluminum coil assembly inside a hospital air handling unit following HVAC retrofit by GRR Cooling Experts.
Brooklyn Hospital Coil Section Retrofit / 2025-11-06 /
Before and after comparison of a legacy belt-driven fan and a retrofitted EC fan array inside a hospital air handling unit following AHU retrofit by GRR Cooling Experts.
NYC Hospital EC Fan Array Completed Live in 6 Hours. / 2025-10-26 /
Before and after view of a hospital air handling unit showing legacy fan equipment on the left and a retrofitted EC fan array on the right, part of a live AHU modernization project in NYC.
Fan Array Upgrade for NYC Healthcare / 2025-10-18 /
Before and after comparison of an outdated rooftop HVAC unit and a newly installed replacement following rooftop retrofit at Kings County Hospital.
Kings County Hospital: 30-Ton Rooftop Unit Retrofit Completed Live in 7 hrs
Before and after comparison of an aging chilled-water coil section and a newly installed aluminum coil assembly inside a hospital air handling unit following HVAC retrofit by GRR Cooling Experts.
Brooklyn Hospital Coil Section Retrofit / 2025-11-06 /
Before and after comparison of a legacy belt-driven fan and a retrofitted EC fan array inside a hospital air handling unit following AHU retrofit by GRR Cooling Experts.
NYC Hospital EC Fan Array Completed Live in 6 Hours. / 2025-10-26 /
Before and after view of a hospital air handling unit showing legacy fan equipment on the left and a retrofitted EC fan array on the right, part of a live AHU modernization project in NYC.
Fan Array Upgrade for NYC Healthcare / 2025-10-18 /

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GRR Cooling Experts Inc. logo blue

GRR Cooling Experts Inc.

159 20th Street
Brooklyn, NY 11232
United States

✆ +1 (718) 768-3740

GRR Cooling Experts Inc. logo blue

GRR Cooling Experts Inc.

159 20th Street
Brooklyn, NY 11232
United States

✆ +1 (718) 768-3740