Building Envelope Code Requirements General Requirements Section C402.1 Building thermal envelope to comply with the following: • Specific insulation requirements of Section C402.2 • Thermal requirements of either: • R-value-based method of Section C402.1.3 • U-, C-, and F-factor-based method of Section C402.1.4 OR • Component performance alternative of Section C402.1.5 • Fenestration in building. [...] Dept of Energy requirements Additional Efficiency Package Options Section C406 • Buildings shall comply with one or more of the following: • More efficient HVAC performance • Reduced lighting power • Enhanced lighting controls • On-site renewable energy • Dedicated outdoor air system • High efficiency water heating • Enhanced envelope performance • Reduced air infiltration Additional Efficiency Pa. [...] Dept of Energy Occupant Sensor Controls Sections C405.2.1, C405.2.1.1 • Occupancy sensors are required in many spaces, including: • Classrooms • Conference/multipurpose rooms • Lounges/breakrooms • Enclosed offices • Open plan office areas • Restrooms • Storage rooms • Warehouse storage areas • Occupancy sensor function (other than for warehouses): • Automatically turn lights off within 20 minutes. [...] • Many more stakeholders than IECC Development • Glide slope to Net Zero by 2030 • Expanded Appendices • Carbon Impact/Credits 2024 National Energy Standard (Cont.) • More focus on Electrification • Tables for Envelope and Fenestrations (402/403)updated • More reliance of high performance • More focus on testing/verification • More intent to move appendices items forward in 2027 & 2030 versions 20. [...] 90.4 -Small Computer rooms still under 90.1 Key Takeaways • 2024 Energy Standard has new requirements for: • Electrification • EV Charging • Solar • Grid Interaction • Carbon • Using & Understanding Guides and formulas is critical • Good Design!!! • Proper envelope construction is key • Right-sizing HVAC is required • Documenting construction and certification 77 Resources • DOE 2018 IECC Presenta.
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Table of Contents
- Slide 1: Nebraska Commercial Energy Code: Air Infiltration, Lighting and HVAC Controls 1
- Slide 2: Housekeeping 2
- Slide 3: Who We Are 3
- Slide 4: About the Nebraska Training Program 4
- Slide 5: Overview 5
- Slide 6: Defining the Building Envelope 6
- Slide 7: Building Envelope 7
- Slide 8: Building Envelope 8
- Slide 9: Building Envelope 9
- Slide 10: Building Envelope: Control Layers 10
- Slide 11: Building Envelope: Many Wall Types 11
- Slide 12: Applied Building Science to the Building Envelope 12
- Slide 13: 2018 IECC Climate Zones 13
- Slide 14: (Not so) Advanced Physics in Building Science 14
- Slide 15: Moisture Flows Four Ways 15
- Slide 16: Moisture Flows Four Ways: Air Transported Moisture 16
- Slide 17: Moisture Flows Four Ways: Air Transported Moisture 17
- Slide 18: Building Envelope Code Requirements 18
- Slide 19: General Requirements Section C402.1 19
- Slide 20: Mandatory Requirements 20
- Slide 21: Air Leakage Section C402.5 (Mandatory) 21
- Slide 22: Air Barrier Construction Section C402.5.1.1 (Mandatory) 22
- Slide 23: Vestibules Section C402.5.7 (Mandatory) 23
- Slide 24: Additional Efficiency Package Options Section C406 24
- Slide 25: Additional Efficiency Package Options Section C406 25
- Slide 26: Performance Testing 26
- Slide 27: Air Leakage & Continuous Air Barrier Testing Section C402.5 27
- Slide 28: 2018 IECC vs ASHRAE 90.1-2016 28
- Slide 29: ASHRAE 90.1 2016 Section 5: Building Envelope Overview 29
- Slide 30: Structure of Standard 90.1-2016 30
- Slide 31: Some Key Changes 31
- Slide 32: Some Key Changes 32
- Slide 33: Existing Buildings 33
- Slide 34: Existing Buildings - Scope Chapter 5 34
- Slide 35: Questions so far? 35
- Slide 36: Lighting (and a Little Power) 36
- Slide 37: Commercial Compliance Options 37
- Slide 38: When do the Lighting and Power Requirements Apply? 38
- Slide 39: Electrical Lighting and Power Systems Requirements 39
- Slide 40: Summary of Changes - Interior Lighting Power Density (LPD) Limits 40
- Slide 41: High-Efficacy Lamps: Definition 41
- Slide 42: Interior Lighting Power Allowance Section C405.3.2 42
- Slide 43: Building Area Compliance Method 43
- Slide 44: Space-by-Space Compliance Method – 9.6.1 44
- Slide 45: Lighting Power Densities Table C405.3.2(1) and Table C405.3.2(2) 45
- Slide 46: Lighting Controls Section C405.2 (Mandatory) 46
- Slide 47: Occupant Sensor Controls Sections C405.2.1, C405.2.1.1 47
- Slide 48: Light-reduction Control Section C405.2.2 48
- Slide 49: Daylight-responsive Controls Section C405.2.3 49
- Slide 50: Sidelit Zone Section C405.2.3.2 50
- Slide 51: Toplit Daylight Zone Section C405.2.3.3 51
- Slide 52: Daylight Areas– 9.4.1.4 52
- Slide 53: Exterior Lighting and Building Lighting Power Sections C405.4, C405.4.1 (Mandatory) 53
- Slide 54: Lighting Alterations 54
- Slide 55: Automatic Receptacle Control – 8.4.2 55
- Slide 56: HVAC (Just a little bit) 56
- Slide 57: Load Calculations are Mandatory 57
- Slide 58: HVAC 101 - Controls 58
- Slide 59: Building Controls are Complicated 59
- Slide 60: Impacts of Non-Ducted Return Air Plenums 60
- Slide 61: Problems of Non-Ducted Return Air Plenums 61
- Slide 62: Problems of Non-Ducted Return Air Plenums 62
- Slide 63: HVAC 101 – Moisture Removal 63
- Slide 64: New Compliance Pathways 64
- Slide 65: Appendix G – Performance Rating 65
- Slide 66: Mechanical Compliance 66
- Slide 67: 90.1 Simplified Approach Option for HVAC Systems 67
- Slide 68: COMcheck 68
- Slide 69: Systems Commissioning and Completion Requirements Section C408 69
- Slide 70: Functional Testing of Lighting Controls Section C408.3.1 70
- Slide 71: Commissioning: Building Envelope Data Points 71
- Slide 72: 2024 National Energy Standard 72
- Slide 73: 2024 National Energy Standard (Cont.) 73
- Slide 74: 2024 National Energy Standard (Cont.) 74
- Slide 75: 2024 IECC The final result is a code that: 75
- Slide 76: ASHRAE 90.1 2019 Changes 76
- Slide 77: Key Takeaways 77
- Slide 78: Resources 78
- Slide 79: MEEA YouTube Videos 79
- Slide 80: Questions? 80
- Slide 81: Thank you! 81
