ASHRAE 90.1-2010 Envelope Highlights

January 7th, 2013

YOUR CONTACTS

• Henry Leung, P.Eng., MBA, LEED AP Senior Design Engineer

• Amir Tehrani, P.Eng., LEED AP

Contract Manager, Partner

AGENDA1. ASHRAE 90.1 Overview

2. Compliance Paths

3. Cost

4. Envelope

5. Mechanical

6. Electrical

To provide minimum requirements for the energy-efficient design of buildings except low-rise residential buildings

30% Energy savings compared to ASHRAE 90.1-2004

OVERVIEW

National Energy Code for Canada

2011

i.e. Canadian ASHRAE 90.1

Mandatory Provisions(required for

most compliance options)

Building System Compliance Options

Energy Code Compliance

Prescriptive Option

Energy Cost Budget

Trade Off Option

Simplified

Envelope

HVAC

Lighting

SWH

Power

Other

Compliance Approaches

LEED

• LEED Canada NC 2009 - Valid until at least 2015

1. ASHRAE 90.1-20072. MNECB 1997

• LEED v4 1. ASHRAE 90.1-20102. maybe NECB 2011

COST

ENVELOPE

SECTION 5ABOVE-GRADE WALL INSULATION

Four types of walls are defined Mass walls

– heat capacity determined from Table A3.1B or A3.1C

– R-value is for continuous insulation or when uninterrupted by framing other than metal clips no closer than 24 in. o.c. horizontally and 16 in. o.c. vertically

Metal building wall R-value – for insulation compressed between metal

wall panels and the steel structure Steel-framed wall R-value

– for uncompressed insulation installed in the cavity between steel studs

Wood-framed and other R-value – for uncompressed insulation installed in

the cavity between wood studs; also acceptable to be continuous insulation uninterrupted by studs

ENVELOPE

Allowed if they don’t increase energy usage of building

Installation of storm windows

Replacement of glazing in existing sash and frame

Alterations to envelope cavities provided they are insulated to full depth with a nominal R-3.0 per in.

Roof and floor alterations where no new cavities are created

Replacement of roof membranes

Replacement of existing doors

Replacement of existing fenestration, provided area of replacement is no more than 25% of total fenestration area

Section 5Envelope Alteration Exceptions

Envelope

Envelope

SECTION 5 – 5.5.4.2.3SKYLIGHT FENESTRATION AREA

Skylights are required in enclosed spaces that are• ≥ 5,000 ft2 and• Ceiling heights > 15 ft and• Space types

– Office - Convention Center– Transportation– Lobby - Automotive Service– Workshop– Atrium - Manufacturing– Concourse - Non-refrigerated

Warehouse– Corridor - Retail– Storage - Distribution/Sorting Area– Gymnasium/Exercise Center

SECTION 5 – 5.5.4.2.3SKYLIGHT FENESTRATION AREA

Total skylight area is either:• Minimum of 3% of roof area with a skylight VLT at least 0.40 OR• Such that the daylight area under skylights is a minimum of half the floor

area and provides a minimum skylight effective aperture of at least 1%Exceptions• Climate zones 6-8• Spaces with LPDs < 0.5 W/ft2

• Shaded spaces• Daylight area under rooftop monitors is > 50% of floor area• Documented that 90% of skylight area is shaded on June 21 (Northern

Hemisphere)/December 21 (Southern Hemisphere) at noon by permanent features

• Required daylight area under skylights may be reduced by amount of:• primary sidelighted area with sidelighting effective aperture > 0.15• secondary sidelighted area with sidelighting effective aperture >

0.30 with general lighting controlled by continuous daylight dimming

SECTION 5 – 5.5.4.5FENESTRATION ORIENTATION

Vertical fenestration area to meet this requirement:

Area South ≥ Area West and Area South ≥ Area East

Exceptions:• Buildings shaded by other buildings within 20 ft to the south

which is at least ½ as tall as the proposed building• Buildings with shade on 75% of the west and east• Alterations and additions that don’t increase vertical

fenestration area

N

No! Yes!

HVAC1. Economizers required for > 4 ton RTU

2. Energy Recovery > 5000 CFM units

HVAC Equipment Covered Air conditioners and condensing units Heat pumps (air, water, and ground source) Water-chilling packages (chillers) Packaged terminal and room air conditioners and heat pumps Furnaces, duct furnaces and unit heaters Boilers Heat rejection equipment (cooling towers) Heat transfer equipment (heat exchangers) Variable refrigerant flow (VRF) air conditioners VRF air-to-air and applied heat pumps Air conditioners serving computer rooms

SECTION 6 – 6.4.1.1 MINIMUM EQUIPMENT EFFICIENCY

DCV must be provided for each zone with a area > 500 ft² and the design occupancy > 40 people/1000 ft² where the HVAC system has:

An air-side economizer, Automatic modulating control of the OSA dampers, or A design outdoor airflow > 3,000 cfm

SECTION 6 – 6.4.3.9 (6.3.2Q)DEMAND CONTROL VENTILATION

Demand control ventilation (DCV): 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.

LIGHTING• Lighting alteration requirements take effect at 10%

replacement• Include exterior areas• Include renovations even when it is just

lamp/ballast replacement

≥ 50% of all 125 volt 15- and 20-amp receptacles (including those in modular partitions) must be controlled by an automatic control device in these space types

Private offices Open offices Computer classrooms

Exceptions Receptacles designated for equipment requiring 24 hr operation Spaces with security or safety concerns

Automatic control devices must function on:

Time-of-day controller provided to control ≤ 25,000 ft2 and not more than one floor

Occupant sensor to turn off receptacles within 30 minutes of occupant leaving the space

Signal from another control or alarm that indicates the area is unoccupied

SECTION 8 – 8.4.2AUTOMATIC RECEPTACLE CONTROL

Automatic lighting shutoff control device required

EXCEPT: Lighting for 24-hour operation Patient care spaces Areas with safety or security concerns

Compliance options:

Control lights on a scheduled basis (automatic time switch) Time-of-day controller Controls ≤ 25,000 ft2 and not more than one floor

Occupant sensor Turn lights off within 30 minutes of occupant leaving the space

Signal from another control or alarm that indicates the area is unoccupied

SECTION 9 - 9.4.1MANDATORY AUTOMATIC SHUTOFF

At least one for each room or space enclosed by ceiling-height partitions

– To have at least one control step between 30% and 70% (inclusive) of full lighting power in addition to all off

• Exceptions:– Lighting in corridors, electrical/mechanical rooms, public

lobbies, restrooms, stairways, and storage rooms– Spaces with only 1 luminaire with rated input power <

100W– Space types with lighting power allowance of < 0.6 W/ft2

– in spaces ≤ 10,000 ft2, each control serves 2,500 ft2 maximum and in spaces > 10,000 ft2, serves 10,000 ft2 maximum

Readily accessible to occupants Override of any time-of-day control for

no more than 2 hours Remote location is allowed to

accommodate areas where safety or security is a concern

SECTION 9 – 9.4.1.2MANDATORY: INDIVIDUAL SPACE CONTROL

Occupancy sensors are required in: Classrooms and lecture halls Conference, meeting, and training

rooms Employee lunch/break rooms Storage and supply rooms between 50

ft2 and 1000 ft2

Rooms used for document copying and printing

Office spaces < 250 ft2

Restrooms Dressing, locker, and fitting rooms

Exceptions:– Spaces with multi-scene control

systems– Shop and lab classrooms– Areas with safety or security concern– Lighting required for 24 hour operation

SECTION 9 – 9.4.1.2 MANDATORY INDIVIDUAL SPACE CONTROLS

Parking garage lighting to be automatically controlled, including daylighting• Must reduce lighting power by minimum of 30% when no activity

detected for no more than 30 minutes within a lighting zone ≤ 3,600 ft2

• Daylight transition zone lighting– Controlled separately to automatically turn on lighting during

daylight hours and off at sunset• Automatically reduce power in response to daylight for luminaires

within 20 ft of any perimeter wall that has– a net opening to wall ratio of ≥ 40% and– no exterior obstructions within 20 ft

Exceptions• Daylight transition zones and ramps without parking are exempt

from 30% reduction and daylight control• Applications using HID of 150W or less or induction lamps are

exempt from 30% reduction

SECTION 9 – 9.4.1.3 PARKING GARAGE LIGHTING CONTROL

Henry Leung, P.Eng., MBA, LEED AP

hleung@bccomfort.com

604-412-0206

THANK YOU