What’s new in the 2015 Commercial IECC?20… · What’s new in the 2015 Commercial IECC? City of Scottsdale IECC Adoption . Effective Date – January 1, 2017 . 2015 IECC . Major

What’s new in the 2015 Commercial IECC?

City of Scottsdale IECC Adoption Effective Date – January 1, 2017

http://www.azcentral.com/story/news/local/scottsdale/2014/07/08/scottsdale-fashion-square-expansion-now-construction/12381347/

2015 IECC Major Commercial Changes

Improved Energy Efficiency

8.7% energy cost savings

8.5% source energy savings

7.6% site energy savings

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ASHRAE 90.1-2013

Location of daylight zones on floor plan Building thermal envelope represented on plans Lighting fixture schedule with wattage and

controls

More Information on Construction Documents


3

Sequence of Inspections Footing and foundation Framing and rough-in Plumbing, mechanical and

electrical rough-in Final inspection

Enhanced Inspections


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Recognition of third-party inspection agencies not affiliated with the building design or construction

Low-energy buildings greenhouses

Equipment buildings small buildings designed to

house electronic equipment that are no more than 500 ft2

Buildings Exempt from Envelope Requirements


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intended to house electronic equipment with installed power totaling less than 7 w/ft2 and not intended for human occupancy

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

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Alternative Envelope Compliance Path

C402.1.5

Component Performance Alternative. Building envelope values and fenestration areas determined with Equation 4-2 shall be permitted in lieu of compliance with the U-, F- and C-factors in Table C402.1.4.

Equation 4-2 A + B + C + D + E ≤ Zero

A = Sum of UA difference values of building thermal envelope B = Sum of FL difference values of slab-on-grade perimeter condition C = Sum of CA difference values of below-grade wall assembly D = Vertical glazing value E = Skylight value


Skylights and daylighting controls for spaces over 2,500 ft2, directly under a roof with a ceiling height greater than 15 feet in following spaces: office, lobby, atrium, storage space,

gymnasium, exercise center, convention center, retail store, automotive service, non-refrigerated warehouse

Expanded Daylighting Requirements


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total daylight zone under skylights shall be not less than half the floor area

Modification based on orientation of fenestration and overhangs (PF) North - vertical fenestration

within 45 degrees of true north SEW – orientations other than

north Previous values were based on

worst case scenario of south, east, west orientations

SHGC values adjusted for Orientation and PF


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9

Climate Zone 1 2 3 4 Except Marine

5 And Marine 4

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Vertical Fenestration (30% or 40% maximum of gross above-grade wall area)

SHGC Orientation SEW N SEW N SEW N SEW N SEW N SEW N

PF < 0.2 0.25 0.33 0.25 0.33 0.25 0.33 0.40 0.53 0.40 0.53 0.40 0.53

0.2 ≤ PF < 0.5 0.03 0.37 0.30 0.37 0.30 0.37 0.48 0.58 0.48 0.58 0.48 0.58

PF ≥ 0.5 0.04 0.40 0.40 0.40 0.40 0.40 0.64 0.64 0.64 0.64 0.64 0.64


Fenestration SHGC Adjustment

Presenter

Presentation Notes

Where different windows or glass doors have different projection factors, they shall each be evaluated separately. PF = A/B (Equation 5-1) where: PF = Projection factor (decimal). A = Distance measured horizontally from the furthest continuous extremity of any overhang, eave, or permanently attached shading device to the vertical surface of the glazing. B = Distance measured vertically from the bottom of the glazing to the underside of the overhang, eave, or permanently attached shading device.

IMC Ventilation for R-2, R-3 and R-4 three stories or less and four stories or more Where the air infiltration rate in a dwelling unit is less than 5 air

changes per hour when tested with a blower door, the dwelling unit shall be ventilated by mechanical means in accordance with IMC Section 403

IMC 401.2 and 403.3

2015 IECC/IMC Major Commercial Changes

Provide outside air ventilation per IMC Table 403.3.1.1

Presenter

Presentation Notes

When a smoker who lives in an apartment building cracks a window, where does the smoke go? The smoker may be hoping that the smoke will go out the window — but in many cases, cracking a window simply allows exterior air to enter the apartment. This makes it easier for the smoke to travel to adjacent apartments.

Higher equipment efficiencies Motorized dampers to better

control outside air intakes and exhaust

Improved energy recovery ventilation systems

Kitchen exhaust airflow rate Economizers and controls

HVAC Upgrades


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NOMINAL PIPE SIZE (inches)

VOLUME (liquid ounces per foot

length)

MAXIMUM PIPING LENGTH (feet)

Public lavatory faucets Other fixtures & appliances

1/4 0.33 6 50

5/16 0.5 4 50

3/8 0.75 3 50

1/2 1.5 2 43

5/8 2 1 32

3/4 3 0.5 21

7/8 4 0.5 16

1 5 0.5 13

11/4 8 0.5 8

11/2 11 0.5 6

2 or larger 18 0.5 4

Service Water Heating Table C404.5.1 – Piping Volume and Maximum Piping Lengths


Demand-Controlled Hot Water Circulation

C404.7

Return line from the heated-water supply pipe to the heated-water source shall be a dedicated return pipe or a cold water supply pipe

Controls shall limit the temperature of water entering the cold-water piping to 104°F

Controls shall start the pump based on the identification of a demand for hot water within the occupancy

Controls shall automatically turn off the pump when the water in the circulation loop is at the desired temperature and when there is no demand for hot water


Lighting System Power and Controls


1) Occupant or vacancy sensor controls required in more types of spaces

2) Time-switch control requirements 3) Daylight zones and daylight-

responsive controls 4) Reduced interior lighting power

allowances (watts/sq.ft.)

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Elevators, Escalators and Moving Walks


Elevator cabs oLuminaires efficacy oVentilation fan efficiency oSleep mode controls

Escalators and moving walks oRegenerative drive

• supplies electrical energy to building electrical system when escalator is loaded with passengers

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Otis

MEI

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Exception: The following systems are exempt from the commissioning requirements: 1. Mechanical systems and service water

heater systems in buildings where the total mechanical equipment capacity is less than 40 tons cooling capacity and 50 tons combined service water-heating and space-heating capacity

C408.2 16


2. Mechanical systems that serve dwelling units and sleeping units

Enhanced System Commissioning


Enhanced System Commissioning

Lighting System Functional Testing Registered design professional shall ensure that lighting

control systems are calibrated, adjusted and programmed to operate in accordance with construction documents and manufacturer’s instructions 1) Occupant sensor controls

2) Time-switch controls

3) Daylight responsive controls

17 C408.3

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New Chapter on Existing Buildings

Historic Additions Alterations Repairs Change of Occupancy

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2015 IECC Implementation and Compliance

C104.4 Approved Inspection Agencies The code official is authorized to accept reports of third-party inspection agencies not affiliated with the building design or construction.