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ASHRAE 90.1 PDF SOFTWARE
ASHRAE 90.1 PDF CODE

Others apply the standard or equivalent standards for all government buildings. Most states apply the standard or equivalent standards for all commercial buildings. Many states apply ASHRAE 90.1 to buildings being constructed or under renovation.

ASHRAE 90.1 PDF CODE

Status as an energy code and industry standard Percent improvement over ASHRAE 90.1 is the basis for awarding energy points within the LEED rating system. Building designs will stated their performance as "40% better than ASHRAE 90.1-2007" or "20% better than ASHRAE 90.1-2010". The performance approach is also used to demonstrate design energy efficiency, often expressed as percent better than ASHRAE Standard 90.1. The proposed energy cost budget must be less than or equal to the baseline energy cost budget to achieve compliance. The ECB is expressed in units of dollars.Ī building performance simulation is then performed on the proposed building design. This baseline ECB is established using building performance simulation to model a building with the same size and program as the project building, built according to the prescriptive requirements of ASHRAE 90.1 (sections 5-10). In the performance approach, a baseline energy cost budget ( ECB) is established, based on the building size and program.

Other equipment (Section 10): electric motors, potable water booster pumps, elevators, and escalators.

Lighting (Section 9): maximum indoor lighting power density (LPD, expressed in Watts/Sq.Ft.), minimum lighting controls, exterior lighting, parking garage lighting.

Power (Section 8): transformer efficiency, automatic receptacle controls, energy monitoring.

Domestic hot water (Section 7): minimum equipment efficiency, minimum system features.

HVAC (Section 6): minimum equipment efficiency, minimum system features, limitation on reheat, limitation on fan power.

Building envelope (Section 5): minimum wall insulation, minimum roof insulation, roof reflectance, minimum glazing performance.

Some sections have mandatory provisions, simplified approaches, or trade-off opportunities.ĪSHRAE 90.1 includes prescriptive requirements for the following: Within the sections of the standard, there are some variations to this. For code compliance there is Chapter 11, which compares an energy model for your building to an energy model for a barely compliant building with the same HVAC system and in the 2016 edition an Appendix G path was added that compares an energy model of your building against a baseline model based on the 2004 edition of Standard 90.1 and requires lower energy consumption that varies depending on the building type.

Performance path: A proposed building design is demonstrated (through building performance simulation) to use less energy than a baseline building built to ASHRAE 90.1 specifications.

Prescriptive path: All components of the building meet the minimum standards specified by ASHRAE 90.1.

In general, there are two means, or paths for building designers to comply with ASHRAE 90.1:

2 Status as an energy code and industry standard.

The CE-marked fenestration does not account for thermal bridging and seasonal performance in the same way as the NFRC rating, and when accounted for in the energy model, has been observed to lead to savings that exceed those claimed for the same fenestration rated under the NFRC ratings. Alternatively, a narrative shall be provided supporting the claim that the fenestration U-factor used in the model is similar to the values that would be achieved using the NFRC rating.

ASHRAE 90.1 PDF SOFTWARE

Column 4 includes, in some cases, further information about the proposal, differences between the proposal and the ASHRAE requirement, or a reference to further documentation.Īdditionally, for projects using the Performance Option for compliance with EAp2: Minimum Energy Performance and EAc1: Optimize Energy Performance, the documentation must also use the calculated U-factor for fenestration products including windows and skylights based on either the LBNL Windows 6 program, or a simulation software program that approximates the NFRC rating methodologies. Column 3 outlines the compliance pathway available for European projects.

Column 2 displays the requirement as written in ASHRAE 90.1-2010. Column 1 of the table references the specific subsection used in ASHRAE 90.1-2010. Developed by members of the European Roundtable, this table provides further guidance for project teams in Europe wishing to use European standards in lieu of certain ASHRAE 90.1-2010 mandatory provisions in LEED v4.