scope:

This guideline provides the procedures and design factors a design engineer should consider; the requirements and installation factors the installing contractor should consider; and the performance, commissioning, and operational factors the contractor and maintenance personnel should consider for a variable refrigerant flow (VRF) system.

This guideline is intended for use with nonresidential building systems (including, but not limited to, hotels, office buildings, hospitals and other health care facilities, assisted living facilities, schools and universities, commercial buildings, industrial buildings, etc.) and centralized heating/cooling systems in multifamily residential buildings. This guideline is not intended for use with low-rise, single-family, residential buildings.

This guideline is intended for use by design engineers, installing contractors, owners, operators, users, maintenance personnel, and equipment manufacturers.

This guideline applies to the design, installation, and commissioning of VRF in new buildings and to the retrofit and renovation of existing buildings.