Welcome to the home page of the Guideline Project Committee 1.2. Our Committee is focused on the development of a new guideline for commissioning existing buildings. This guideline will provide guidance to building owners, commissioning providers and all others involved in the commissioning of existing buildings. The Committee currently has five subcommittees, each working on developing a specific step in the commissioning process. The guideline will form part of the ASHRAE commissioning guideline series, the basis of which is formed by guideline 0, available in the ASHRAE bookstore at this link. Guideline 1, specifically geared to the commissioning of HVAC systems, is available at this link. Guideline 0 provides a framework for commissioning new buildings and is not written for any particular system or building component. Instead, it describes the generic process of commissioning, applicable for all elements of construction. Guideline 1 provides assistance by applying guideline 0 specifically to HVAC Systems. Guideline 1.2 will describe the commissioning process for all elements of construction in an existing building, and may in the future be complemented by a guideline specifically aimed at particular systems within existing buildings. If you are a building owner or operator, commissioning agent or contractor with an interest in commissioning existing buildings, please look at our membership page to find out who to contact for questions or ideas. To see why commissioning of existing buildings in particular is so relevant in today's world, please read the 2006 ASHRAE Presidential Address by Terry Townsend.