Glossary

The following is a compilation of building energy-code related terms and acronyms used on the Building Energy Codes website and throughout the building construction industry.

Select a letter to navigate through the glossary:

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NAECA

The National Appliance Energy Conservation Act of 1987, 42 USC 6291 et seq., as amended, Public Law 100-12.

NAGDM

National Association of Garage Door Manufacturers.

NCSBCS

The National Conference of States on Building Codes and Standards.

NEEA

Northwest Energy Efficiency Alliance.

NEEP

Northeast Energy Efficiency Partnerships.

Net Wall Area

The net wall area includes the opaque wall area of all above-grade walls enclosing conditioned spaces, the opaque area of conditioned basement walls less than 50% below grade (including the below-grade portions), and peripheral edges of floors. The net wall area does not include windows, doors, or other such openings, because they are treated separately.

NFPA

National Fire Protection Association.

NFRC

National Fenestration Rating Council.

Non-Recirculating System

A domestic or service hot water distribution system that is not a recirculating system.

Non-Renewable Energy

Energy derived from a fossil fuel source.

Non-Residential

All occupancies other than residential.

Non-Standard Part-Load Value (NPLV)

A single-number, part-load efficiency figure of merit calculated and referenced to conditions other than IPLV conditions, for units that are not designed to operate at ARI Standard Rating Conditions.

North-Oriented

Facing within 45 degrees of true north (northern hemisphere).

NPLV

See Non-standard part-load value.

NWWDA

National Wood Window and Door Association.