© 2009 Trane ANSI/ASHRAE/IESNA Standard Top 10 things you should know about the energy standard

© 2009 Trane ASHRAE Standard 90.1 Scope of 2007 Update Incorporates 42 addenda published since was released

© 2009 Trane ASHRAE Standard Purpose “… Provide minimum requirements for the energy- efficient design of buildings except low-rise residential buildings”

© 2009 Trane applies to the entire building

© 2009 Trane 10 Applies to Entire Building Envelope HVAC Service water heating Power Lighting Electric motors

© 2009 Trane 9 Certain system controls are mandatory

© 2009 Trane 9 Mandatory System Controls Deadband: ≥ 5° F Automatic shutdown (systems ≥ 15,000 Btu/h)  7-Day time schedules with 10-hr battery backup, or  Occupancy sensor, or  Manually operated timer with 2-hr max duration, or  Security system interlock

© 2009 Trane 9 Mandatory System Controls Setback (Requirements vary for different cooling and heating climates) Optimum start if system supply air > 10,000 cfm Automated shutoff control  Ventilation (outdoor-air) dampers  Exhaust dampers

© 2009 Trane 9 Mandatory System Controls Zone isolation  25,000 ft² maximum zone size on one floor  Shut off airflow  Central systems capable of stable operation

© 2009 Trane 8 Lighting requirements

© 2009 Trane Lighting Power Densities Interior LPD, W/ft² Hospital1.6 Library1.5 Manufacturing2.2 Museum1.6 Office1.3 Retail1.9 School1.5 Space type Building area method

© 2009 Trane 8 Lighting Power Densities Space type Interior LPD, W/ft² Office, enclosed Office, open plan Conference Training Lobby Lounge Dining Food prep May trade power between spaces Space-by-space method

© 2009 Trane 8 Interior Lighting Control Must provide: At least one control in each space Automatic shutoff for buildings > 5,000 ft²

© 2009 Trane 7 Applies to building alterations and additions

© 2009 Trane 7 Alterations and Additions Individual components must comply with requirements When changing multiple components, annual energy use ≤ compliant design

© 2009 Trane 6 Limitation on system fan power

© 2009 Trane 6 Air System Design & Control Fan system power limitation:  Applies to systems > 5 hp OptionConstant volumeVariable volume 1) Nameplate hp hp ≤ CFMs x hp ≤ CFMs x ) System bhp bhp ≤CFMs x A bhp ≤CFMs x A Change

© 2009 Trane Fan Power Limitation Pressure Drop Adjustment A = Σ (PD x CFM design / 4131) PD specified for  Ducts  Filters  Gas-phase air cleaners  Heat recovery devices  Sound attenuation sections  Other devices Change

© 2009 Trane prescriptive HVAC requirements Air System Design & Control VAV fan control  Motors ≥ 10 hp require one of the following: Variable-speed drive Vaneaxial fan with variable-pitch blades Design wattage ≤ 30% at 50% air volume  DDC systems must include setpoint reset (fan-pressure optimization) (was 15 hp) Change

© 2009 Trane 5 Limitation on reheat with new energy

© 2009 Trane simultaneous heating–cooling Zone-Control Exceptions Airflow must not exceed the larger of:  Standard 62’s for requirements zone OA or  0.4 cfm/ft² or  30% of supply air or  300 cfm or  Standard 62’s multiple-space requirements Site-recovered or site-solar energy accounts for 75% of reheat

© 2009 Trane simultaneous heating–cooling Dehumidification Exceptions Reducing supply airflow to 50%, or minimum ventilation rate Systems < 6.67 tons that can unload at least 50% Systems < 3.3 tons Systems with specific humidity requirements (museums, surgical suites) 75% of reheat/recool energy is site-recovered or site-solar

© 2009 Trane 4 Requirement for air- and waterside energy recovery

© 2009 Trane 4a Airside Energy Recovery Required if:  Supply air capacity ≥ 5,000 cfm  Minimum outdoor air ≥ 70% Recovery system effectiveness ≥ 50% Exceptions  Labs, toxic exhaust, etc.  Largest exhaust < 75% outdoor air  Heating systems in hot climates  Cooling systems in cool, marine climates

© 2009 Trane 4b Waterside Energy Recovery Must recover condenser heat for service water heating (SWH) if:  Facility operates “24/7” and  Heat rejection > 6,000,000 Btu/h and  Design SWH load > 1,000,000 Btu/h Where required, meet smaller of:  Recover 60% of rejected condenser heat or  Preheat water to 85°F

© 2009 Trane 3 Fan pressure optimization for DDC/VAV systems

© 2009 Trane 3 Fan-Pressure Optimization communicating BAS duct pressure VAV damper position

© 2009 Trane 3 Fan-Pressure Optimization Damper position (% open) of critical VAV box 75% 65% Increase duct static setpoint Reduce duct static setpoint No action Control logic

© 2009 Trane 2 Mandatory requirements for equipment efficiency

© 2009 Trane 2 Examples of Mandatory Efficiency § : “… Where multiple rating conditions or performance requirements are provided, the equipment shall satisfy all stated requirements …” Equipment typeMinimum efficiency Self-contained, water-cooled11.0 EER w/electric resistance heat10.3 IPLV (20–100 tons) Water-source heat pump12.0 EER (cooling) (1.5–5.25 tons) 4.2 COP (heating) Centrifugal chiller, 6.10 COP0.576 kW/ton water-cooled ( 300 tons) 6.40 IPLV0.549 IPLV (at ARI rating conditions)

© 2009 Trane VFDs and Centrifugal Chillers “… Where multiple rating conditions or performance requirements are provided, the equipment shall satisfy all stated requirements, unless otherwise exempted by footnotes in the table …” from ASHRAE , Section , Minimum Equipment Efficiencies “… If a frequency conversion device or motor starter is furnished as part of the compressor circuit, the compressor power input shall be measured at the input terminals of the frequency converter or motor starter” from ARI Standard 550/ Must meet full-load and part-load requirements

© 2009 Trane 1 Already part of state/local energy codes

© 2009 Trane ASHRAE Standard 90.1 and Energy Codes IECC–Chapter 8 adopts by reference IECC–Chapter 7 describes an alternate path for compliance  Includes many provisions of  ASHRAE is proposing code changes to increase stringency International Energy Conservation Code (IECC)

© 2009 Trane ASHRAE Standard 90.1 adoption Outside the U.S. United States ASHRAE Standard Thailand Major changes based on building envelope studies Canada Similar or higher efficiency levels Brazil Law (2004), Energy Efficiency Standards China Modifying for high local ambient wet bulbs

© 2009 Trane ASHRAE Standard 90.1 adoption by U.S. Department of Defense “2-1 MANDATORY ENERGY AND WATER CONSERVATION CRITERIA. Family housing (residential) shall be designed and constructed in accordance with the latest Energy Star standards, per other appropriate service-specific criteria and guidance. Other facilities shall be designed and constructed in accordance with the latest edition of ASHRAE Standard 90.1.” —Excerpt from Unified Facilities Criteria _UFC pdf

© 2009 Trane ASHRAE Standard 90.1 and LEED ® -NC Version 2.2 EAp2: Minimum energy performance  Mandatory provisions of and Prescriptive requirements of or Performance requirements of Section 11 EAc1: Optimize energy performance  Awards points for improving performance rating of the design building vs. baseline building per

© 2009 Trane LEED NC 2009 : EAp2 Minimum energy performance Option 1: performance compliance path  Mandatory provision (5.4, 6.4, 7.4, 8.4, 9.4, and 10.4)  Baseline building complies with Appendix G Building PRM  10% better than for new construction, 5% better for existing building Option 2: prescriptive compliance path  ASHRAE AEDG small office buildings 2004 small retail buildings 2006 small warehouses and self-storage buildings 2008 Option 3: prescriptive compliance path  Advanced Buildings Core Performance Guide

© 2009 Trane Members$74 Others$93 ASHRAE Standard Availability  Read online  Order from bookstore (electronic or paper)  Check for addenda (continuous maintenance)  Download compliance forms Members$88 Others$110 TechnologyLinkLanding/category/1638

© 2009 Trane ANSI/ASHRAE/IESNA Standard Questions?