2018 IECC Commercial RequirementsOverview

Eri/Makela Group

Online WebinarDavid Freelove

Recognition

About Idaho Code Collaborative

Mission:The Idaho Energy Code Collaborative facilitates energy code implementation through education, outreach and technical assistance and prepares for the adoption of new energy codes by vetting changes and providing an open forum for stakeholders to voice concerns and reach consensus.

History of Energy Codes

• •MEC 1992, ’93, 95 – “Early” energy codes,• complicated, DP windows required• •IECC 98, 2000, ‘03 – “Strengthening”,• SHGC of 0.4 required where < 3500 HDD• •IECC 2004, ‘06 – “Simplification”,• Fewer CZ’s, eliminate % glazing,• certificate required• •IECC 2009 – Duct + envelope testing,• efficient lighting – ARRA “mandated”• •IECC 2012 – More challenging than ever – much• stricter testing requirements!• • The code keeps raising the bar (typically 1‐3%) until more recently!• • ‘09 Code is ~15% more stringent than ‘06 version• • ‘12 Code is ~26% more stringent than ‘06 version• • ‘15 Code target is ?? > than ‘06 version

Idaho Energy Circuit Rider

“Dedicated to education all Idaho citizens and stakeholders on the practical value of energy codes”

• Design Professionals• Contractors• Jurisdictions• Public/ Homeowners

energy@idabo.org208-880-7589

Who are you?

• Name

• Organization/company

• How long have you been

• in the design,

• construction, contractor

• or enforcement

• industry?

Inspections

• Who inspects the energy provisions for

• Envelope?

• Lighting?

• Mechanical?

• Domestic Hot Water?

• Renewables?

– Energy codes and standards set minimum efficiency requirements for new and renovated buildings, assuring reductions in energy use and emissions over the life of the building. Energy codes are a subset of building codes, which establish baseline requirements and govern building construction.

– Code buildings are more comfortable and cost-effective to operate, assuring energy, economic and environmental benefits.

Why Care About the IECC?

Climate Zones

Ch. 1 Scope and Application / Administrative and Enforcement

Ch. 2 Definitions

Ch. 3 General Requirements

Ch. 4 Commercial Energy Efficiency

Ch. 5 Existing Buildings

Ch. 6 Referenced Standards

Index

Structure of the 2015 IECC

Ch. 1 Scope and Application / Administrative and Enforcement

Ch. 2 Definitions

Ch. 3 General Requirements

Ch. 4 Residential Energy Efficiency

Ch. 5 Existing Buildings

Ch. 6 Referenced Standards

Index

Commercial

Section

Residential

Section

2015 IECC Scope and Administration Major Changes

2015 IECC Scope and Administrative Major Changes

Does My Project Need to Comply with the Commercial Provisions in the IECC?

All Buildings Other Than:

✓One- and two-family residential

✓R-2, R-3, R-4 three stories or less in height

ScopeSection C101.4.1 - Mixed Occupancy

Section C101.5 - Compliance

✓Treat the residential occupancy under the applicable residential code

✓Treat the commercial occupancy under the commercial code

✓Code Official has final authority

– Compliance materials, Software, worksheets

ScopeSection C102.1 – Alternative Materials, Design, and Methods of Construction

and Equipment

• The code is not intended to prevent installation of any material or prohibit design of construction that is not specifically prescribed in this code

• Such material, equipment, or design shall be approved by the code official

✓Inspections, C104– Successive and final inspections, and reinspections if necessary

✓Code Validity, C105– Code deemed to be illegal or void shall not affect the remainder of

the code

✓Codes and standards, C106– Provisions take precedence and considered part of the requirements

of the code

✓Fees, C107– Must be paid before permit is issued– Required in accordance with schedule

✓Stop Work Order, C108✓Authority of code official✓Failure to comply

✓Board of Appeals, C109

ScopeSection C104-C109

• Construction work for which a permit isrequired is subject to inspection by code official or designated agent

• Required inspections include:

– Footing and foundation

– Framing and rough-in

– Plumbing rough-in

– Mechanical rough-in

– Electrical rough-in

– Final

InspectionsSection C104

Codes and standards listed in Chapter 6 are considered part of the requirements of this code to the “prescribed extent of each such reference and as further regulated in Sections C106.1.1 and C106.1.2”

• Conflicts, C106.1.1 – where differences occur between this code and the referenced codes and standards, provisions of this code apply

• Provisions in reference codes and standards, C106.1.2 –“where the extent of the reference to a referenced code or standard includes subject matter that is within the scope of this code, the provisions of this code, as applicable, shall take precedence over the provisions in the referenced code or standard”

Referenced Codes and StandardsSection C106.1

Fenestration Product ratingC303.1.3

• U-factors of the fenestration products(windows, doors and skylights) shall be determined in accordance with NFRC 100

Exception: Where required, garage door U-factors shall be determined in accordance with either NFRC 100 or ANSI/DASMA 105

• U-factors shall be determined by an accredited, independent laboratory, and labeled and certified by the manufacturer

NFRC Certificate

Buildings or portions of buildings that are separated from remainder of building by building thermal envelope assemblies complying with C402 are exempt from the Envelope provisions if:

– Peak design rate of energy < 3.4 Btu/h/ft2 or 1.0 watt/ft2 of floor area for space conditioning purposes, OR

– Those portions or building that do not contain conditioned space, OR

– Greenhouses

Low-energy BuildingsSection C402.1.1

•Separate buildings with floor area not more than 500ft² (50m²)

•Buildings intended to house electronic equipment with installed equipment power totaling not less than 7W/ft² (75W/m²) and not intended for human occupancy

•Buildings with a heating capacity not greater than (17,000 Btu/hr)(5kW) and a heating thermostat set point that is restricted to not more than 50°F

•Buildings with an average wall and roof U-factor less than 0.2 in CZ1-5 and less than .12 in CZ6-8

•Buildings that comply with the roof solar reflectance and thermal emittance provisions for CZ1

Buildings that comply with the following are exempt

from the building thermal envelope

provisions:

Equipment BuildingsC402.1.2Equipment Buildings C402.1.2

Prescriptive

C402 Envelope

C403 Mechanical

C404 SWH

C405 Lighting

Pick One

C406.2 – Eff. HVAC

Performance

C406.3 – Reduced LPD

C406.4 – Digital Lighting Controls

C406.5 – On-Site Renewable

Energy

C406.6 – Outdoor Air System

C406.7 – Reduced Energy Use in

SWH

C406.8- Enhanced Envelope

Performance

C406.9- Reduced Air Infiltration

Performance Approach

C407 Total Building Performance

C402.5 – Air Leakage

C403.2 –Provisions applicable to all mechanical systems

C404 – SWH

Lighting Mandatory

Sections

C405.2

C405.3

C405.4

C405.6

C405.7

C405.8

C405.9

ASHRAE 90.1 - 2013

✓Roof/Ceiling Assembly

✓Wall Assembly

✓Vertical Fenestration and Skylights

✓Floor Assembly

✓Slab Edge

✓Below Grade Wall Assembly

What is the Building Thermal Envelope?

Table C402.1.3 Opaque Thermal Envelope

+ R-5 Full Slab

Table C402.1.3Heated Slabs

• Climate zone 5

- Group R R-15 for 36 inches below grade + R-5 entire slab

- ALL OTHER R-15 for 36 inches below grade + R-5 entire slab

• Climate zone 6

- Group R R-15 for 48 inches below grade + R-5 entire slab

- ALL OTHER R-15 for 36 inches below grade + R-5 entire slab

Below-grade Walls SectionC402.2.5

• C-factor to be in accordance with Table C402.1.4

• R-value of continuous insulation within or on below grade exterior walls to be per C402.1.3

• C-factor or R-value required to extend to a depth of not less than 10 feet below outside finished ground level or level of lowest floor in conditioned space enclosed by the below-grade wall, whichever is less

Mandatory Requirements

• Thermal envelope air leakage• Air barriers • Fenestration air leakage• Rooms containing fuel-burning appliances• Doors and access openings to shafts, chutes,

stairways and elevator lobbies • Air intakes, exhaust openings, stairways and

shafts• Loading dock weatherseals• Vestibules • Recessed lighting

Air Barriers and Construction C402.5.1 and C402.5.1.1

Air barrier requirements: Placement allowed

Inside of building envelope

Outside of building envelope

Located within assemblies composing envelope OR

Any combination thereof

Air Barrier Compliance Options C402.5.1.2

Materials Assemblies

Testing

Three ways to comply with air

barrier requirements

Air Barrier Materials (Compliance) C402.5.1.2.1

Materials with air permeability ≤ 0.004 cfm/ft² under pressure differential of 0.3 in. w.g. when tested in accordance with ASTM E 2178 comply with materials provision.

The following materials meet this requirement:

Materials

Air Barrier Building Testing AlternativeC402.5

Thermal envelope of buildings must comply with either the materials or assemblies provision OR be tested in accordance with ASTM E 779 at a pressure differential of 0.3 inch water gauge or equivalent method approved by code official

Building thermal envelope with a tested air leakage rate of ≤ 0.40 cfm/ft² complies with air leakage requirements

Duct and Plenum Insulation and SealingC403.2.9 Mandatory

Required for Supply and Return Ducts and Plenums Ducts

• Located in Unconditioned Space – R6Insulation

• Ducts Located Outside the Building Envelope – R8 Insulation in CZ 1-4 and R12 in CZ 5-8

• Located in Envelope Assembly – Must Be Separated from Building Exterior with R8 Insulation in CZ 1-4 and R12 in CZ 5-8

Exceptions• Ducts Located within Equipment• Maximum Design Temperature Difference (Interior – Exterior) is < 15°F

Refrigeration SystemsC403.2.14 - .17

Refrigeration Equipment Performance• Sets maximum kWh/day for the following type of refrigeration equipment

• Commercial refrigeration e.g refrigerators and freezers with solid or transparent doors

• Commercial refrigerators and freezers• Walk-in Coolers, freezers, refrigerated warehouse freezers

• Automatic door closers• Minimum envelope insulation levels• Double or triple-pane glass with inert gas or heat-reflective treated glass for reach-

in doors• Fan motor requirements for evaporator and condenser motors• High efficacy lighting

• Refrigerated Display Cases• Lights controlled by automatic time switch or occupancy sensor• Temperature based defrost termination and anti-sweat controls

Mechanical Systems Commissioning and Completion C403.2.11 Mandatory

HVAC Commissioning

Applies to buildings with a total building equipment capacity ≥

• 480,000 Btu/h cooling capacity, or

• 600,000 Btu/h heating capacity

Requires:

• Commissioning plan

• Systems adjusting and balancing

• Functional performance testing

• Equipment

• Controls

• Economizers

• Preliminary commissioning report

• Construction documents and O&M Manuals

• Final commissioning report and air balancing report

Commissioning Exceptions

• Total equipment capacity includes water heating

• Combined capacity of heating and water heating is less than 600k Btu

• Less than 480k Btu of cooling capacity

• Systems included in C403.3 that serve individual dwelling units and sleeping units.

Commissioning PlanC408.2.1

• Developed by a registered design professional or approved agency and include the following items

1. A narrative description of the activities that will be accomplished during each phase including personnel intended to accomplish each phase

2. A listing of specific equipment, appliances or system to be tested and a description of test performed

3. Functions to be tested including, but not limited to calibrations and economizer controls

4. Conditions under which the test will be performed. Shall affirm winter and summer design conditions

5. Measurable criteria for performance

CommissioningC408.2.2 System Adjusting and Balancing

• Shall be balanced with generally accepted engineering standards

• Air and water flow rates shall be measured and adjusted per product specifications

• Test and balance activities shall include air system and hydronic system balancing

• Discharge dampers for air system balancing prohibited on constant and variable fans 10hp and larger

• Hydronic systems shall be equipped with means for balancing, pumps shall maintain design flows, and have the ability to measure or test pressure across the pump

C408.2.3Functional Performance Testing

C408.2.3Functional Performance Testing

C408.2.4Preliminary Commissioning Report

C408..2.4.1Acceptance of Report

408.2.5Documentation requirements

C408.2.5.3System Balancing Report

C408.2.5.4Final Commissioning Report

What’s Covered Under Electrical Power and Lighting Systems Requirements?

Mandatory Interior Lighting requirements

•Required Controls

•Wattage/Efficiency Limits

Interior Lighting Power Allowances (watts/ft2)

Exterior Lighting Controls

•Required Controls

•Lamp Efficiency

Exterior Lighting Power Allowances (watts/ft2)

Electric Metering

Interior Lighting Controls C405.2

Lighting systems must have the following controls:

• Occupant sensor controls (C405.2.1)

• Time-switch controls (C405.2.2)

• Daylight-responsive controls (C405.2.3)

• Specific application controls (C405.2.4)

• Exterior lighting controls (C405.2.5)

Exemptions:

•Security or emergency areas that must be continuously lighted

•Interior exit stairways, interior exit ramps and exit passageways

•Emergency egress lighting that is normally off

Occupancy sensors exempts the requirement for time-switch controls and light reduction controls

Interior Lighting PowerC405.4.2

Two methods to determine allowance:

Building Area Method

• Floor area for each building area type x value for the area

• “area” defined as all contiguous spaces that accommodate or are associated with a single building area type as per the table

• When used for an entire building, each building area type to be treated as a separate area

Space-by-Space Method

• Floor area of each space x value for the area

• Then sum the allowances for all the spaces

• Tradeoffs among spaces are allowed

Building Area Method Table (Partial)

Table C405.4.2(1) Interior Lighting Power allowances: Building Area Method

Building Area Type LPD (w/ft2)

Automotive facility .80

Convention Center 1.01

Courthouse 1.01

Dining: Bar lounge/leisure 1.01

Dining: Cafeteria/fast food 0.9

Dining: Family 0.95

Dormitory 0.57

Exercise Center 0.84

Fire Station 0.67

Gymnasium 0.94

Health Care Clinic 0.90

Hospital 1.05

Hotel/Motel 0.87

Library 1.19

Manufacturing Facility 1.17

Space-By-Space Method Table (Partial)

Table C405.4.2(2) Interior Lighting Power Allowances:

Space-By-Space method

Common Space-By-Space Types LPD (w/ft2)

Atrium First 40 ft in height 0.03 per ft. in total height

Atrium Above 40ft in height 0.40 + 0.02 per ft. in total height

Audience/seating area

For Auditorium

For Performing Arts Theatre

For Motion Picture Theatre

Class Room/Lecture/Training

Conference/Meeting/Multipurpose

Corridor

0.63

2.43

1.14

1.24

1.23

0.66

Dining Area

In a penitentiary

In a facility for the visually impaired

Bar/Lounge/Leisure Dining

Family Dining Area

0.96

1.90

1.07

0.89

Electrical/Mechanical 0.95

Food Preparation 1.21

Laboratory for Class Rooms 1.43

Laboratory Otherwise 1.81

Skylight Minimum Fenestration AreaSection C402.4.1

• Limited to ≤ 3% of Roof Area

• Up to 6% allowed if automatic daylighting controls installed in toplit zones

Existing BuildingsSection C503 - Alterations

• Envelope – where existing building exceeds fenestration area limitations of Section C402.4.1 prior to alteration, building is exempt from C402.4.1 provided there is no increase in fenestration area

2018 IECC COMMERCIAL ADDITIONAL REQUIREMENTS

Additional Efficiency Requirements

High Efficiency HVAC

Onsite Renewables

One Additional Efficiency Feature Must Be Selected to Comply with the IECC

•More efficient HVAC•Reduced lighting power density•Enhanced lighting controls•On-site renewable energy•Dedicated outdoor air system•High-efficiency SWH

More Efficient HVAC Equipment Performance C406.2

– Equipment must exceed minimum efficiency requirements listed in Tables C403.2.3(1) through C403.2.3(7) by 10% in addition to requirements of Section C403

– Where multiple performance requirements are provided, equipment must exceed all requirements by 10%

– Variable refrigerant flow systems must exceed ASHRAE 90.1 by 10%

High Efficiency HVAC

Reduced Lighting Power DensityC406.3

Total interior lighting power of building must be determined using 90% of lighting power values specified in Tables C405.4.2(1) times the floor area for building types OR by using 90% of the interior lighting power allowance calculated by the space-by-space method

Interior lighting in the building must have the following controls:

• Luminaires must be capable of continuous dimming

• Luminaires must be capable of being addressed individually

• Not more than 8 luminaires may be controlled together in a daylight zone

• Fixtures must be controlled through a digital control system

• Construction documents must include submittal of a Sequence of Operations

• Functional testing of lighting controls must comply with Section 408

Enhanced Digital Lighting ControlsC406.4

On-Site Renewable EnergyC406.5

Total minimum ratings of on-site renewables must comply with one of the following

Provide not less than 0.5 watts per square foot of conditioned floor area

Provide ≥ 3 percent of the energy used within the building for building mechanical and service water heating equipment and lighting regulated in Chapter 4

• Buildings covered by Section C403.4 shall be equipped with an independent ventilation system designed to provide > the minimum 100% outdoor air to each occupied space.

• Ventilation system must be capable of total energy recovery

• HVAC system must include supply-air temperature controls that automatically reset supply-air temperature in response to building loads or outdoor air temperatures

• Controls must reset the supply-air temperature at least 25% of the difference between the design supply-air temperature and design room-air temperature.

Dedicated Outdoor Air SystemsC406.6

Reduced Energy Use in SWHC406.7

Buildings must be of the following types to use this compliance option:• Group R-1: Boarding houses, hotels or motels• Group 1-2: Hospitals, psychiatric hospitals and nursing homes• Group A-1: Restaurants and banquet halls or buildings containing food preparation

areas• Group F: Laundries• Group R-2: Buildings with residential occupancies• Group A-3: Health clubs and spas• Buildings showing a service hot water load of 10% or more of total building energy

loadsLoad Fraction (C406.7.1)Building SWH system must have one or more of the following that are sized to provide not less than 60% of hot water requirements or sized to provide 100% of hot water requirements if the building otherwise complies with C403.4.7:• Waste heat recovery from SWH, heat recovery chillers,

building equipment, process equipment, or a combined heat and power system

• Solar water-heating systems

Enhanced Envelope PerformanceC406.8

• Enhanced Envelope Performance- Total UA of building thermal envelope as designed to be not less than 15% below total UA of building thermal envelope per Section C402.1.5

Reduced Air InfiltrationC406.9

• Reduced Air Infiltration – Air infiltration verified by whole-building pressurization test

• Per ASTM E779 or ASTM E1827

• By independent third party

– Measured air-leakage rate not to exceed 0.25 cfm/ft2 under pressure differential of 0.3 inches w.c.(75 Pa), with calculated surface area the sum of above-and below-grade building envelope

– Submit report to code official and building owner

• Including: tested surface area, floor area, air by volume, stories above grade, and leakage rates

Exception: Buildings over 250,000 ft2 of conditioned floor area don’t need testing on whole building, can test representative above-grade sections. Tested areas to total not less than 25% of conditioned floor area and tested per C406.9

Questions