THE FUTURE IS HERE: New Homes, New Codes and Net Zero Living

Transcription

1 THE FUTURE IS HERE: New Homes, New Codes and Net Zero Living Andrew Oding CEA, BSSO, LEED AP CHAIR, Canadian Home Builders Association NET ZERO HOUSING COUNCIL

2 1. What are Net Zero Energy homes? 2. Net Zero homes and Natural Gas The opportunities The technologies 3. Next Steps for the industry

3 Net Zero Home Definition A Net Zero Energy home is one that is designed, modelled and constructed to produce as much energy as it consumes on an annual basis. NOT Net Zero as operated but uses assumptions for occupant consumption The energy produced is a) generated on-site and b) renewable. Net Zero can be achieved via net-metering AND/OR battery storage. It includes all forms of energy (ie passive and thermal) including acknowledgment of gas and electrical base loads. Net Zero Ready (NZEr) = A Net Zero home that has not yet installed the renewables(e.g Solar)

4 THE ROAD AHEAD 2017 OBC Net Zero READY

5 Net Zero- Benchmarks Around the world Japan: 20,000 zero energy homes in 2014! USA-California: All homes to be NetZero Ready by 2020! Europe: All new buildings zero energy 2021! UK: Grading of all Homes! A to G scale.

6 2017 regulations coming: Officially identifying Net Zero/Carbon Neutral ready Homes $20,000 incentive for homeowners who meet Net Zero/Carbon Neutral ready 2030 Building Code Residential Target Engage consumers with electric vehicles through building code requirement for electric charging stations in every new home and residence. HERD (Home Energy Rating Disclosure) Mandatory Energy Audit requirement before re-sale of home. And on and on.. Climate Change and the Ontario Building Code

7 5 Net Zero Communities across Canada ECOII: Owens Corning & Natural Resources Canada

8 Existing Programs 21%+ of all starts in Canada (33%+ of all starts in Ontario-2014 = Energy Star) 8

9 We need to speak the same language Gigajoule (GJ) Current Energy Rating System 0 to 100 index, 100 is Best NEW Energy Rating System Gj/m 2 0 is best

10 NEW Energy Rating System Includes AC loads Better reflection of air tightness & ventilation Better reflection of energy improvements Updated algorithms ZERO means zero offsite energy use

11 Canadian Housing and the Giga-what? 2011 Household and the Environment: Energy Use - Statistics Canada Average NEW Dwelling Townhomes/Duplexs/etc. Net Zero/ Net Zero Ready Homes GJ/yr 94 GJ/yr 36 to 40 GJ /yr

12 30 years ago. Typical 1975 to 1982 Household Elec: 10,000kWh< Nat Gas: 300m3 < Green House Gas: 19 to 22 TONNES ANNUAL CONSUMPTION: 200GJ< Lights / Appliances 10% AC? (Not included) Hot water 15% Heating 75%

13 A CODE BUILT HOME TODAY NBC 9.36 / Ontario Building Code Elec: 9,500kWh< Nat Gas: 150m3 < GHG: 11 TONNES < ANNUAL CONSUMPTION: 115 GJ< AC? NOW STANDARD-

14 A NET ZERO HOUSEHOLD Net Zero / 2030 Home Elec: 8,000kWh< Nat Gas: 90m3 > GHG: 1.0 TONNES < ANNUAL CONSUMPTION: GJ< AC? NOW STANDARD-

15 A GAS-CENTRIC NET ZERO HOME

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17 A COMMON NET ZERO HOME ENERGY PROFILE Annual Energy Consumption by Device End-use Value Space heating Primary 4 Secondary 2 DHW heating 4 Occupant Base loads 22 HRV & Fans 1 Air Conditioner 1 Total annual energy consumption 34 GJ 34 GJ ANNUAL CONSUMPTION Ontario Building Code Home = 105GJ to 120GJ

18 A COMMON NET ZERO HOME ENERGY PROFILE 34 GJ Annual Consumption + 9kW Photovoltaic (36GJ) = NET ZERO (slightly Net Positive +2GJ) Carbon Reduction? GHG reduced from 8 tonnes to 1-2 tonnes

19 WHAT HAVE WE LEARNED SO FAR ABOUT NET ZERO HOMES?

20 LESSONS LEARNED Better initial ROI with Enclosure and Mechanical Upgrades vs SOLAR (Renewables) If we rely only on solar here is what we get. Photovoltaic= $2 to $3 per watt CREATED Enclosure /Mechanicals = $0.30 to $1 per watt SAVED

21 LESSONS LEARNED Net Zero Homes Are LOW LOAD Homes 2017 Building Code Net Zero Ready

22 LESSONS LEARNED Net Zero /Low load homes shouldn t be complicated

23 LESSONS LEARNED Net Zero Homes are Fuel Agnostic Dual Fuel /Hybrid Solutions work Enables smart use of Electrical or Gas Balance point can be either Operational OR Economic Provides resilience Low Ambient ASHP HI SEER Cooling

24 LESSONS LEARNED DOMESTIC HOT WATER IS A BIG DEAL In Net Zero homes DHW is tied with space heating as the 2 nd largest load

25 LESSONS LEARNED SMART COMFORT CONTROL, NOT SET BACK THERMOSTATS Low, slow heat loss /heat gain = No gain from set backs day to day : SET IT AND FORGET IT Should work with dual fuel options, with ventilation appliance(hrv/erv) and optimize for fuel swapping or energy optimization controls

26 EQuilibrium Program ~ $120,000 Now NRCan Net Zero communities initiatives ~ $65-80,000 Targeting $40,000 for Net Zero $15,000 for Net Zero Ready $15,000 for envelope & mechanical upgrades $25,000 for PV/Solar LESSONS LEARNED What are the costs?

27 Natural Gas and Net Zero Housing The Opportunities and Technologies

28 GAS BASED TECHNOLOGIES Shrinking loads Challenge or Opportunity for utilities? Gas based heat pump systems; Heating AND Cooling! Combined heat and power (CHP and micro-chp) for: Single detached homes

29 GAS BASED TECHNOLOGIES Incredible opportunity for enhanced UTILITY PARTNERSHIPS CHP in Multi family buildings (fastest growing building type in Canada (MURBS, Midrise) Community Scale CHP; 1 utility, 1 grid.

30 GAS & NET ZERO COMMUNITY PLANNING 1. Building design, orientation and utility grid options/design NEED TO COMPLETED EARLY IN DEVELOPMENT PROCESS 1. Master planned, resilient, independent and net positive energy producing communities. 2. Potential to leverage Federal and Provincial investment in community scale project(okotoks: Drakes Landing AB) 3. Explore utility partnerships with developers: 1 utility / 1 grid

31 REVIEW Learn How Net Zero Homes and Building Perform(What are the metrics??) Low load, Net Zero communities present opportunities for resilient, affordable, net positive gas based communities (and can work alongside renewables e.g Solar) Identify the opportunities for affordable fuel(nat Gas) technologies and community scale micro-grids Start early and align strategic partnerships : Developer, Builder, Utility, Building official, Manufacturer, Trades! Be a LEARNING CORPORATION. Good to Great & Alvin Toffler-writer extraordinaire

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