Commercial Provisions

Commercial Provisions
2009 IECC TRAINING Commercial Provisions Energy Systems Laboratory

Agenda Introductions Legislative Background Information
SECO Rule Making Regional Efforts 2009 IECC Significant Changes

Introductions Me - Ed Dryden 12 Years HVAC Industry Experience
25 years experience in municipal code enforcement Certified Building Official & other ICC Certifications IAS Committee Member for 3 Years Member of North Central Texas Council of Government’s Building & Energy Code Advisory Board Current Building Official, City in North Texas Instruct energy code workshops for ESL for 4 years You…..

American Recovery and Reinvestment Act
General Requirements of ARRA Target Benchmarks: 2009 IECC for Residential ASHRAE for Commercial 90% compliance: Model Energy Codes (state-developed) exceeding 2009 IECC or SB16 is Texas’ response (adopted 09 IECC effective 2012)

Legislative Background Information
In 2001 (SB 5) the legislature made the finding that an effective building energy code is essential to: (1) reducing the air pollutant emissions that are affecting the health of residents of this state; (2) moderating future peak electric power demand; (3) assuring the reliability of the electrical grid; and (4) controlling energy costs for residents and businesses in this state.

To accomplish these findings: 1. The energy efficiency chapter of the IRC, (2000/2001 supplement) was adopted as the energy code in this state for single-family residential construction, and 2. The IECC (2000/2001 supplement) was adopted as the energy code in this state for all other residential, commercial, and industrial construction.

A City shall establish procedures: (1) for administration and enforcement; and (2) to ensure that code-certified inspectors shall perform energy inspections A City may establish procedures to adopt local amendments to the energy codes, but Local amendments may not result in less stringent energy efficiency requirements in nonattainment areas and in affected counties, and Local amendments must comply with the National Appliance Energy Conservation Act

If the SECO determines, based on written recommendations from the ESL, that the energy efficiency provisions of the latest editions of the IRC or the IECC for residential or commercial energy efficiency and air quality are equivalent to or more stringent than the base codes, SECO may by rule adopt and substitute in the energy code the equivalent or more stringent editions

Effective January 1, 2012, the energy efficiency provisions of the International Residential Code as they existed on May 1, 2009, are adopted as the energy code in this state for single-family residential construction Effective April 1, 2011, the International Energy Conservation Code as it existed on May 1, 2009, is adopted as the energy code for use in this state for all residential, commercial, and industrial construction that is not single-family residential NOTE: Single family is defined as 1& 2 family detached dwellings and townhomes in the statute

ESL, at the request of a City, shall determine the relative impact of proposed local amendments to an energy code, including whether proposed amendments are substantially equal to or less stringent than the unamended code. For the purpose of establishing uniform requirements throughout a region, and on request of a council of governments, a county, or a municipality, the laboratory may recommend a climatically appropriate modification or a climate zone designation for a county or group of counties that is different from the climate zone designation in the unamended code.

North Central Texas Council of Governments has reviewed and provided “recommended” amendments to the 2009 IECC and the energy provisions of the 2009 IRC “Recommended” amendments have been reviewed and approved by ESL as not less stringent Available for viewing and download at:

Chapter 1 NCTCOG Recommended Amendment
Historic Buildings. Any building or structure that is listed in the State or National Register of Historic Places; designated as a historic property under local or state designation law or survey; certified as a contributing resource with a National Register listed or locally designated historic district; or with an opinion or certification that the property is eligible to be listed on the National or State Registers of Historic Places either individually or as a contributing building to a historic district by the State Historic Preservation Officer of the Keeper of the National Register of Historic Places, are exempt from shall comply with all of the provisions of this code. Exception: Whenever a provision or provisions shall invalidate or jeopardize the historical designation or listing, that provision or provisions

Chapter 1 101.4.3 Additions, alterations, renovations and repair
4 New Exceptions in 09 IECC 5. Reroofing for roofs where neither the sheathing nor the insulation is exposed. Roofs without insulation in the cavity and where the sheathing or insulation is exposed during reroofing shall be insulated either above or below the sheathing. 6. Replacement of existing doors that separate conditioned space from the exterior shall not require the installation of a vestibule or revolving door, provided, however, that an existing vestibule that separates a conditioned space from the exterior shall not be removed, 7. Alterations that replace less than 50 percent of the luminaires in a space, provided that such alterations do not increase the installed interior lighting power. 8. Alterations that replace only the bulb and ballast within the existing luminaires in a space provided that the alteration does not increase the installed interior lighting power.

Chapter 1 NCTCOG Recommended Amendment
Alternative compliance. A building certified by a national, state, or local accredited energy efficiency program and determined by the Energy Systems Laboratory to be in compliance with the energy efficiency requirements of this section may, at the option of the Code Official, be considered in compliance. The United States Environmental Protection Agency's Energy Star Program certification of energy code equivalency shall be considered in compliance. Reflects the mandate of Texas HB 1365, 78th Legislature

Chapter 1 Administration
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Chapter 2 Definitions Air Barrier Curtain Wall Daylight Zone
Demand Control Ventilation Entrance Door Fans……. High Efficacy Lamps Labeled/Listed Storefront

Chapter 2 Definitions x

Chapter 3 Climate Zones

Chapter 3 Climate Zones NEW in 2009 IECC
Insulation product rating. The thermal resistance (R- value) of insulation shall be determined in accordance with the U.S. Federal Trade Commission R -value rule (CFR Title 16, Part 460, May 31, 2005) in units of h × ft2 × °F/Btu at a mean temperature of 75°F (24°C).

Chapter 5 Commercial Provisions
501.2 – Application - Commercial buildings must comply: 502 – Building envelope requirements, 503 – Building mechanical systems, 504 – Service Water Heating, and 505 – Electrical power and lighting systems OR 506 – Performance plus 11 Mandatory items Compliance must be demonstrated with either IECC or ASHRAE 90.1 in its entirety – no more mixing envelope, lighting, mechanical or service water heating.

502.1 General (Prescriptive). Insulation and fenestration criteria. The building thermal envelope shall meet the requirements of Tables 502.2(1) and based on the climate zone specified in Chapter 3.. Buildings with a vertical fenestration area (40%) or skylight area (3%) that exceeds that allowed in Table shall comply with the building envelope provisions of ASHRAE/IESNA 90.1. U -factor alternative. An assembly with a U -factor, C -factor, or F -factor equal or less than that specified in Table shall be permitted as an alternative to the R -value in Table 502.2(1).

Section Insulation and fenestration criteria The building thermal envelope shall meet the requirements of Tables 502.2(1) and based on the climate zone If vertical fenestration or skylight are exceed that allowed then the envelope shall comply with 90.1 or- Section U-factor alternative Assembly U-factors, C-factors or F-factors equal or less than Table are permitted

Chapter 5 Commercial Provisions - Envelope

When using Rx Table approach compliance method, a R-5 thermal block is required

Table 502.2(1) - Roofs for metal buildings, insulation is expressed as R13 + R13 Detailed description is found in Table 502.2(2) First R-value is faced fiberglass insulation batts draped over purlins Second R-value is unfaced fiberglass insulation batts installed parallel to the purlins A minimum R-3.5 thermal spacer block is placed above the purlin/batt and roof deck is secured to the purlins Known as “Sag and Bag” technique

– Opaque doors All are required to meet the U-factor requirement for doors as specified in Table 502.2(1). Includes overhead coiling and metal roll-up doors used for conditioned loading docks.

502.4 Air leakage (Mandatory). Window and door assemblies. Curtain wall, storefront glazing and commercial entrance doors. Sealing of the building envelope. Hot gas bypass limitation. Outdoor air intakes and exhaust openings. Loading dock weatherseals. Vestibules. Recessed lighting.

– Window and door assemblies AAMA/WDMA/CSA 101/I.S.2/A440 or NFRC 400 – Curtain wall, storefront glazing, and commercial entrance doors tested for leakage ASTM E 283

Section Sealing of the building envelope Openings in the building envelope shall be sealed, caulked, gasketed, taped or covered with a moisture vapor-permeable wrapping material. Provisions for expansion and contraction required Section Outdoor air intakes and exhaust openings Stair & elevator shaft intakes and other openings integrated in the envelope shall be equipped with not less than Class I motorized, leakage rate damper – max leakage rate of 4 cmf per sq ft – AMCA 500D Exception: Gravity dampers okay in buildings < 3 stories

Section Loading dock weatherseals Cargo doors and loading docks must be equipped with weather seals to restrict infiltration Section Vestibules Doors separating conditioned space from unconditioned space from the exterior must protected with a enclosed vestibule Doors must be self closing 6 Exceptions: Doors that are not Entrance Doors, Doors opening from a space less than 3,000 square feet in area

Section Recessed lighting NOTE: Section revised in entirety Recessed lights installed in building envelope shall be IC rated and labeled as meeting ASTM E 283 – no more than 2 cfm of air movement at a pressure differenct of 1.57 psf All recessed lights shall be sealed with a gasket or caulked

Store Front and Curtain Walls Glazing Requirements If compliance approach uses other than default U-factor and/or SHGC values for glazing the designer must provide Label Certificate NFRC provide 3 options: Pre-certified assemblies from many manufacturers Site built approach, and Since January 1, 2010 implemented Component Modeling Approach (CMA) Label Certificates are site specific

The NFRC's new Component Modeling Approach (CMA) Product Certification Program enables whole product energy performance ratings for commercial projects. The concept is performance data from the three primary components that make up a fenestration product are used for obtaining an overall product performance rating. Three primary components used are: Glazing: : Glazing optical spectral and thermal data from the International Glazing Database (IGDB) Frame: Thermal performance data of frame cross-sections Spacer: Keff of spacer component geometry and materials The Component Modeling Approach Software Tool (CMAST) establishes a set of performance libraries of approved components (frames, glass, and spacer) which can be accessed for configuring fenestration products for a project, and obtaining a U-factor, Solar Heat Gain Coefficient (SHGC), and Visible Transmittance (VT) rating for those products, which can then be reflected in a CMA Label Certificate for code compliance.

Break 15 minutes

Chapter 5 Commercial Provisions - Mechanical
Section General Mechanical systems and equipment providing heating, cooling or ventilating needs shall comply with either: 503.3 – Simple Systems, or 503.4 – Complex Systems. There are 11 Mandatory requirements applicable to both simple and complex systems

Section Simple HVAC systems and equipment Simple systems are served by unitary or packaged HVAC equipment, each serving one zone and controlled by a single thermostat in the zone served. It also applies to two-pipe heating system, where no cooling system is installed. Section Complex HVAC systems and equipment Any system that is not a simple system Remember: There are 11 mandatory requirements applicable to both simple and complex systems

– Calculation of loads – Equipment & system sizing – Equipment performance requirements – System controls – Ventilation – Energy recovery ventilation systems – Duct & plenum insulation sealing – Piping insulation – System completion – Fan system design & control – Heating outside a building

Section Calculation of heating & cooling loads Design loads must be calculated Loads shall be adjusted for energy recovery systems Standard is ASHRAE/ACCA Standard 183 Alternate designs shall be determined by an approved equivalent Using design parameters from Chapter 3

Section Equipment and system sizing “Shall not exceed the loads calculated.” Single piece equipment with both heating & cooling must satisfy this provision for one function – other function as small as possible within available equipment options Exceptions: Required standby equipment to have controls to operate automatically when primary equipment is not operating Multiple units with combined capacities that exceed design load shall have controls to sequence operation

Section – Equipment performance requirements Equipment efficiencies listed in 7 tables Single phased air cooled A/C & heat pumps <65k Btuh set by National Appliance Energy Conservation Act of 1987 (NAECA) All efficiencies verified by approved certification programs Mixing manufacturer’s components (indoor/outdoor coils) to be verified with calculations and supporting data

Section HVAC system controls Each heating and cooling system shall be provided with: Thermostatic Controls Set point overlap restriction Off-hour controls Setback capabilities Automatic setback and shutdown capabilities Shut off damper controls Snow melt system controls

Section Thermostatic controls One stat each zone – must respond to temp in zone (exceptions for permeter systems) Humidification/dehumidification requires minimum one humidistat Heat pump supplementary heat Section Set point overlap restriction T-stats controlling both heat & cool must have 5 degree F min deadband

Section Off-hour controls Each zone must be controlled by automatic time clock or programmable controls T-stats must have setback capability to maintain min of 55 degree F or max 85 degree F Must have automatic time clock or programmable controls For 7 different daily schedules per week Retain programming for 10 hours when power lost 2 hour over ride capability; or occupancy sensor

Section – Shutoff damper controls Motorized dampers required on outdoor air supply and exhaust ducts Exception #2 – Gravity dampers permitted in Climate Zones 1, 2 and 3 – Snow melt system controls Automatic controls that meet both: Shut of when the pavement temperature is above 50oF and no precipitation is falling and An automatic or manual control that will shutoff when the outdoor temperature is above 40oF

Section Ventilation Ventilation – natural or mechanical - must be provided per Chapter 4 IMC Where mechanical ventilation is provided, system must have capability to reduce OA supply to minimum required by Chapter 4 IMC Section Demand control Ventilation

Section – Demand control ventilation - A ventilation system capability that provides for the automatic reduction of outdoor air intake below design rates when the actual occupancy of spaces served by the system is less than design occupancy

The requirement for Demand Control Ventilation is triggered when: The space is larger than 500 square feet in area, Has an average occupant load of 40 people per 1000 square feet per Table IMC, and Is served by one or more of the following: Air side economizer, Automatic modulating control of the outdoor air damper, and/or A design outdoor airflow greater than 3,000 cfm Note there are 4 exceptions

Section Energy recovery ventilation systems - Systems that employ air-to-air heat exchangers to recover energy from exhaust air for the purpose of preheating, pre-cooling, humidifying or dehumidifying outdoor ventilation air prior to supplying the air to a space either directly or as part of an HVAC system Triggered for individual fan systems with both: Design supply air > 5,000 cfm, and Min OA > 70% of design supply air

Section Duct and plenum insulation and sealing All supply and return ducts must be insulated R-5 in unconditioned spaces R-8 when outside the building Air handlers and filter boxes joints and seams sealed to comply with IMC 603.9 All duct system joints and seams must be sealed with approved mastics, tapes High pressure duct systems (> 3 inches w.g.) must be pressure leak tested

Section Piping Insulation Piping serving as part of heating or cooling systems must be insulated according to Table

Section HVAC completion – Air system balancing in accordance with the IMC – Hydronic system balancing Individual hydronic heating and cooling coils to be equipped with means for balancing and pressure test connectors – Manuals that minimally include: Equipment capacities Operation and maintenance manuals System control maintenance calibration; wiring diagrams, schematics, control sequence, control set points, narrative

Section Air system design controls HVAC systems having a total fan system motor name plate horsepower > 5 hsp shall satisfy Option #1 or option #2 Fan system motor nameplate horsepower, or Fan system brake horsepower And For each fan, the selected fan motor may be no larger than the first available bhp

Section Heating outside a building Heating systems installed outside a building shall only be radiant systems, and Controlled by occupancy sensor or timer so that…. No heat when no occupants present

– Calculation of loads – Equipment & system sizing – Equipment performance requirements – System controls – Ventilation – Energy recovery ventilation systems – Duct & plenum insulation sealing – Piping insulation – System completion – Fan system design & control – Heating outside a building

Break 15 minutes

Section & Economizers Economizers required for both simple and complex systems; exception for improved efficiencies for zones 2B, 3B & 4B Note: Exceptions for simple and complex differ

Section Complex Systems Economizers – Variable air-volume (VAV) fan control – Hydronic systems Hydronic (water loop) heat pump systems w/ several sub items – Heat rejection equipment fan speed control – Requirements for complex mechanical systems serving multiple zones – Heat recovery for service water heating

Section – Variable air-volume (VAV) fan control Individual VAV fan motors >10 Hp (7.5 kW) Driven by mechanical or electrical variable speed drive, or Have controls or devices resulting in a fan motor demand <50% of the design wattage at 50% of design airflow when static pressure set point = 1/3 of the total design static pressure

Section Hydronic Systems Controls – Three-pipe systems PROHIBITED – Two-pipe changeover system Dead band between changeover of 15oF outside air temperatures Allow operation in one mode for at least 4 hours before changing over to the other mode Allow heating and cooling supply temperatures at the changeover to be no more than 30oF apart

Section – Heat rejection equipment fan speed control Fan Motors >7½ HP must have: Capability to operate fan at < 2/3 of full speed or less, and Controls that automatically change the fan speed to control the leaving fluid temperature or condensing temperature/pressure of heat rejection device Exception: Factory installed heat rejection devices within HVAC equipment meeting equipment efficiency requirements

Section – Requirements for complex mechanical systems serving multiple zones Supply air systems serving multiple zones must be VAV systems. Controls are required to reduce primary air to each space before allowing: Reheating Recooling Mixing

Section – Requirements for complex mechanical systems serving multiple zones The primary air supply must be reduced by one of the following means before reheating, recooling, or mixing takes place: 30% of the maximum supply air flow to each zone 300 cfm (142 L/s) where maximum flow rate is less than 10% of total fan system supply airflow rate Minimum ventilation requirements of the International Mechanical Code® (IMC®) 6 exceptions

Section – Heat recovery for service water heating Condenser heat recovery required for heating or reheating service hot water where: Facility operates 24 hours a day, and Total installed heat capacity of water cooled systems >6,000,000 Btu/hr of heat rejection, and Design service water heating load exceed 1,000,000 Btu/h

Section 504 Service Water Heating Minimum efficiency requirements for equipment Temperature controls must allow set point of 110° F for dwelling units and 90° F for all other occupancies Outlet temp to public lavatories shall be limited to 110° F Heat traps required to prevent thermosiphoning

Section Pipe Insulation Circulating systems 1” of insulation on piping R-3.5/inch minimum Noncirculating systems without integral heat traps 1/2” for first 8 feet Section Hot Water System Controls Automatic circulating hot water systems and heat trace turned off automatically or manually when the system is not in operation

Section Pools Pool Heaters Readily accessible On/Off switch on heater Natural gas or LPG heaters shall not have continuously burning pilot lights Time switches to turn off heaters & pumps All – Heated and Unheated Exception Where 24 hour operation is required for public health standards Where pumps are required to operate solar and waste- heat recovery pool heating systems

Section Pool Covers Pool Covers Required for Heated Pools Vapor retardant, on or at the pool surface > 900F requires R-12 minimum Exception 60% of the energy for heating is from site-recovered or site-solar energy

Chapter 5 Commercial Provisions–Electrical Power & Lighting Systems
Section General (Mandatory) The lighting requirements cover these elements: Light system controls Connection of ballasts Maximum lighting power for indoor applications Minimum lighting equipment for exterior applications

Section Lighting Controls (Mandatory) – Interior lighting controls Each area enclosed by walls shall have at least one manual control – w/ exceptions – If manual control required, additional controls required Light reduction controls Automatic lighting shutoff Occupant over ride Holiday scheduling Daylight zone control Sleeping unit controls

Section – Light reduction controls S Dimmer Switch D Alternate Luminaires Alternate Lamps (a/b) Full Range Dimming Alternate Rows

Section – Automatic lighting shutoff Buildings larger than 5,000 square feet Scheduled basis, using time-of-day Areas not to exceed 25,000 or more than one floor An occupant sensor Within 30 minutes of occupants leaving Signal from another control or alarm system when the area is unoccupied Only one of the 3 options is required

Section Occupant Override If an automatic time switch control is installed, it must have an occupant override, be readily accessible, and have the following: Be in view of the lights Manually operated. Two-hour override limit Controls area less than 5,000 square feet Holiday scheduling feature

Section Daylight zone control Daylight zone defined as: Area under skylights Area adjacent to windows The lights located in Daylight zones, as defined, must be switched independently of general area lighting

Section – Sleeping units Sleeping units in hotels, motels, boarding houses must have one master switch at main entry to control all permanently wired lights and switched receptacles

Section – Exterior lighting controls Must be controlled so they are automatically shut off during daylight hours Seven day/seasonal daylight program Minimum 10-hour battery backup

Section – Tandem wiring (Mandatory) Exceptions Electronic high-frequency ballasts Luminaires on emergency circuits Luminaires with no available pair in the same area

Section – Exit signs (Mandatory) Internally illuminated exit signs not to exceed 5 watts per side

Section – Interior lighting power requirement (Prescriptive) – Total connected interior lighting power Sum of the watts of all interior lighting Screw lamp holders – max labeled wattage Low-voltage lighting – transformer wattage Other luminaires Line-voltage lighting track and plug-in busway Minimum 30 watt per linear foot, System circuit breaker, or Other current limiter(s)

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Table , Footnote b – Merchandise Display The additional lighting allowance for merchandise display lighting applies to retail sales

Additional Interior Lighting Power Allowance = 1000 watts + (Retail Area 1 x 0.6 W/ft2) + (Retail Area 2 x 0.6 W/ft2) + (Retail Area 3 x 1.4 W/ft2) + (Retail Area 4 x 2.5 W/ft2) Retail Area 1 = Floor area for all products not listed in Area 2, 3, or 4 Retail Area 2 = Floor area for the sale of vehicles, sporting goods, and small electronic Retail Area 3 = Floor area for the sale of furniture, clothing, cosmetics and artwork Retail Area 4 = Floor area for the sale of jewelry, crystal and china

Section – Exterior Building Grounds Lighting Exterior grounds luminaires > 100watts, minimum efficacy of 60 lumens/watt required

Section – Exterior Building Lighting Power The total exterior lighting power allowance for all exterior building applications is the sum of the base site allowance plus the individual allowances for areas that are to be illuminated and are permitted in Table (2) for the applicable lighting zone Exceptions

Chapter 5 Commercial Provisions – Total Building Performance
506.1 – General The Total Building Performance Method allows trade-offs between the building envelope, mechanical systems, service water heating and lighting systems in commercial buildings. Following loads shall be included: cooling, heating, service water heating, fans systems, lighting power, receptacle loads and process loads.

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