How often do I need maintain equipment in order to meet the credit requirements?

A prescriptive frequency for equipment isn’t established within the credit requirements. So, it’s up to your team to determine the appropriate frequency. However, it is important to demonstrate that there is a maintenance program in place for all of the equipment in your documentation. For example, vacuums will need bag replacements or filter changes. Examples for other less frequent maintenance will include inspections of or replacement of electrical components of equipment.

My project does not have a zip code because it is not located in the U.S. Can the project still apply for Regional Priority credits?

Yes. A set of Regional Priority credits is available for projects located ouside of the United States, Puerto Rico, the U.S. Virgin Islands and Guam. The list can be found through USGBC's regional priority page (see Resources).

How can I document a longer equipment life (20 or 30 years) than what is listed in the LEED Reference Guide?

The project team must use equipment life values from the 2007 ASHRAE Applications Handbook as listed in the LEED Reference Guide. For equipment not listed in the ASHRAE Applications Handbook, the equipment life must be assumed to be 15 years—no estimates are allowed. An alternative equipment life may only be used if a manufacturer’s guarantee and equivalent long-term service contract can be provided. 

For a split system, does the cooling capacity refer to the cooling power of the interior device (evaporator) or of the outdoor unit (condenser)?

The system capacity should be based on the outdoor units. If you have multiple interior devices connected to one outdoor unit, the cooling capacity should be for the outdoor unit, but the refrigerant charge must include all interior devices.