Field Equipment Lending Library

A collection of various diagnostic and measuring tools that can be borrowed at the Field Equipment Lending Library.

Program Overview

The Field Equipment Lending Library (“FELL”) enables City staff to borrow energy-related field testing and diagnostic equipment to evaluate the performance of their buildings and identify operational issues. DEM runs FELL in collaboration with the City University of New York’s Building Performance Lab. FELL staff also can provide City staff with help selecting the correct tools to diagnose building issues and training on how to use them.

Go to the FELL website

Search the online equipment catalog or download the catalog

Contact FELL for equipment questions or training needs


To date, staff from 20 City agencies have borrowed equipment to help improve the performance of their buildings. Since 2016, FELL has offered free courier delivery service to City staff in all five boroughs.

How to Participate

FELL resources are available to City staff and public facility building operators.

Borrow field equipment

Fill out the request form

Pick up and drop off equipment