3rd edition, amendment 2

All of the Acceptable Solutions and Verification Methods relating to H1 are contained in one document.

• Defines the Building Performance Index (BPI) in relation to a building.
• H1/VM1 provides a verification method for the building thermal envelope and the modelling of housing and small buildings, and other large buildings. It gives replacement tables for certain minimum insulation/R-values and a means of determining thermal resistance.
• H1/AS1 to be used for housing, communal residential, communal non-residential and commercial buildings.  It gives replacement tables for minimum insulation/R-values and a means to comply for control of airflow, solar heat gain, hot water systems and artificial lighting.

Defines the Building Performance Index (BPI) in relation to a building.

Provides verification methods and acceptable solutions for the building thermal envelope. Applies to housing, communal and commercial buildings. Modelling of housing and small buildings, and other large buildings. Determines insulation/R-values by building size, climate zone, construction method and building classification.