ÖNORM B 8110-5

The present Austrian Standard specifies the boundary conditions for the calculation of heating demand and of cooling demand according to ÖNORM B 8110-6-1. This ÖNORM defines a method for the determination of location dependent standard external temperatures, based on the data included in the file „OIB-Richtlinie 6, NAT Excel“ (OIB Directive 6, NAT Excel), available from the homepage (http://www.oib.or.at) of the Austrian Institute for Building Technology (OIB). Furthermore, the present ÖNORM establishes a method for the determination of external air temperature with an exceedance frequency of 130 days within 10 years, based on the data included in the file „OIB-Richtlinie 6, NAT-T13 Excel“ (OIB Directive 6, NAT-T13 Excel), available from the homepage (http://www.oib.or.at) of the Austrian Institute for Building Technology (OIB).