Next Generation EnerGuide Rating System Presented to: Canadian Renovators ’ Council

Download Next Generation EnerGuide Rating System Presented to: Canadian Renovators ’  Council

Post on 03-Jan-2016




0 download

Embed Size (px)


Next Generation EnerGuide Rating System Presented to: Canadian Renovators Council February 23 rd , 24 th 2011. 1. The Next Gen ERS. The EnerGuide Rating System has been very successful The ERS has been in use for 12 years. Originally developed for Federal Voluntary programs - PowerPoint PPT Presentation


  • **Next Generation EnerGuide Rating System

    Presented to:Canadian Renovators CouncilFebruary 23rd, 24th 2011

  • *The EnerGuide Rating System has been very successfulThe ERS has been in use for 12 years.Originally developed for Federal Voluntary programsNearly a million houses labelledToday: Many more stakeholders using the system for many more activitiesRegulatoryIncentivesProgramsTime to take what we have learned and develop the next generation of the ERS

    The Next Gen ERS

  • *A standard development process using:A Standard Council of Canada based approach,Committees of balanced representation, A process based on consensus principles, andPublic review.Ensures transparency and buy-in by all stakeholders

    The Next Gen ERS Process

  • *Committee Structure

  • *Vision of ERS in the marketplaceThe ERS will provide a national system, supporting (and supported by) regional solutions, to:Help Canadian homeowners, industry and stakeholders, become energy literate regarding houses and the decisions related to themProvide specific, readily accessible energy performance information to support decision making in designing, constructing, purchasing, renovating or operating a house

  • *ERS ObjectivesProvide the consumer, industry and other stakeholders with clear, easily understood, home energy information at a reasonable costServe as the backbone of all home energy programming and policy development in CanadaProvide a robust, efficient and effective delivery modelAccount for total energy use and production

  • *Straightforward, meaningful portrayal of home energy useAllows comparison of all homes regardless of type or locationGood design is reflected in the rating design mattersPositions the house against the same house built to codeEnergy improvement can be expressed in straight percentagesHarmonizes with the appliance scaleFuel neutral, size neutral, seamless with any code and with any code changesWhole house consumptionEnergy Rating:Provide the consumer and stakeholders with clear, easily understood, cost effective home energy information

  • *Increases energy literacyAllows the consumer or regulator to extract the selective information they requireProvides information to support policies

    In addition to the energy use figure, provide a nutrition label style array of informationProvide the consumer and stakeholders with clear, easily understood, cost effective home energy informationThe label will be supplemented with a Guide to the Label and a Homeowner Information Sheet.

    Additional information will be available through a suite of on-lines services at

  • *The My EnerGuide Homeowner Information Sheet will include such information as:A description of how energy is used in the homeA listing of data that was collected to rate the house incl.: Airtightness levels Insulation levels Window sizes and performance Mechanical system performanceThe next steps a homeowner can take to upgrade the energy performance of their house

    Provide the consumer and stakeholders with clear, easily understood, cost effective home energy information

  • *Serve as the backbone of all home energy policy and programming in CanadaStandard home evaluationStreamlined base rating with blower door test Add-on modules:Renovation Upgrade EvaluationConstruction Upgrade Service for New HomesEfficient Living AssessmentConstruction Blower Door testComplimentary to codeReport on GHGs, regionally

  • *Account for total on-site energyuse and production (1 of 3) Heat LossWindows, exterior doors and skylights,Ceiling assemblies, with and without attics,Above grade wall assemblies,Below grade wall assemblies,Exposed floor assemblies, Basement slab insulation, andAirtightness.Base house energy use and productionSpace heating and coolingHot waterMechanical ventilationPassive solar gainsGains from active renewable energy systems

  • *Account for total on-site energyuse and production (2 of 3)

    Occupancy driven energy useSet to Standard Operating ConditionsSet point temperaturesHot water loadElectrical loadsLightingAppliancesOther electrical loads (computers, dvd, small appliances)Use of Base load packages (standard, mid, high) to set the base electrical load

  • *

    The rating should cover the house itself, not the propertyLarge a-typical loads will not be included in the rating but will be noted on the homeowner information sheet (e.g.. pools, hot tubs)Renewables will be included where it can be shown that renewable supply is dedicated to the home solar hot water solar PV wind

    Account for total on-site energy use and production (3 of 3)

  • *More InformationDevelopment of Next Generation Energy Efficiency Housing Standards:

    To register as an observer

  • *Next StepsFinalize recommendations on standardPublic review: March/April 2011PilotLaunch: not before April 2012

  • *


    Next Generation ERS

    ***The current EnerGuide Rating System has been around for more than a decade. It was originally developed by the Federal Government (in consulation with stakeholders from across the country) for use in Federal programs. It has been very successful. More than XXX houses have been labelled resulting in XXX energy efficiency retrofits and designs of more efficient new houses.

    However, over the years more stakeholders from across the country have started to use it different ways. It is finding itself in both government and private sector programs (e.g. LEED, Built Green, Power Smart); it is often the bases for government incentives in both new and existing homes; it is now being used to develop performance levels in code and in some cases as a stated requirement; finally it is being considered as the basis for mandatory labelling.

    This is all good news because it means that across the country stakeholders are using a consistent methodology for rating the performance of a house. However, with these myriad of uses it is time to take a step back after 12 years and ask such questions as what should the system of the future be? and How can this system be improved to meet the needs of these new stakeholders and activities?

    This is what we are now doing. NRCan has launched a process to develop the Next Generation of the EnerGuide Rating System.*The development of the next generation of the EnerGuide Rating System is being undertaken using a Standard Council of Canada based approach. This means that an Advisory Committee has been put in place for the process. It was formed ensuring balanced representation for both expertise and geographical location. The committee recommendations are based on consensus and will have a public review period. All of this will ensure transparency of the process.*The committees have been in place for a year now and are working very hard. The Policy Advisory Committee is made up of representatives of provincial and territorial ministries and is responsible for all recommendations coming out of the process. The Technical subcommittee is working on all of the technical criteria and calculations for the system. The Information Subcommittee is formulating recommendations on the outputs from the system (for example, the label, homeowner reports, web presence, etc.). The Delivery Subcommittee is looking at high level recommendations for such things as training and certification requirements.

    *The vision the PAC has laid out for the next generation of the EnerGuide Rating System is to provide a national system that not only supports regional solutions but is also supported by regional solutions. What is meant by that is that NRCan is working very closely with their stakeholders to ensure that the rating system can be used to support local programs, regulations, etc. and that in turn regional stakeholders can help support the development of the ERS to meet needs across the country.

    Energy literacy is a big component of the PACs vision for the ERS. They want to increase all stakeholders understanding of how energy is used in houses and then provide readily accessible energy performance information to support decision making in designing, constructing, purchasing, renovating or operating a house.

    *The PAC has recommended 4 objectives be followed in the development of the next gen ERS.

    The system must be able to provide information on which industry and homeowners can make informed decisions about energy use in the home. This is a critical element. Energy literacy is being put as a top priority. The ERS system must be developed in such a way as to be able to be used by different stakeholders for different purposes in different places across the country. The key is to build a system based on scientific principles that has been developed and vetted by the some of the best experts in the country. Then other stakeholders can build their programs around the energy calculations used in the ERS, knowing the robustness of the system. Perhaps it sounds like a tall order but the committees are managing just that.The third objective is to provide a robust, efficient and effective delivery model. This is meant to build on the current system and take it even further now that partners across the country are beginning to use it, or consider using it, for such things as regulation (codes and mandatory labelling). You want high quality for voluntary programs, you need even higher robustness for regulation. The system must go beyond just space heating and hot water this time round and include all energy uses including production. This means air conditioning will also be included as well as energy production systems such as solar hot water, solar photovoltaics and wind.

    *In order to provide clear easily understood information on the energy consumption of the house the PAC is recommending a consumption based scale. This is a straightforward, meaningful portrayal of energy use. The rating is expressed in GJ per year. In general, the scale ranges from 0 (on the left), representing a net zero house, to as high as is required for the house being rated (on the right). The rating estimates the amount of energy the house consumes in a year less the amount of energy provided from on-site renewable energy sources. The scale allows for houses which produce more energy then they consume in a year (to the left of the zero).

    It rates the house as is without building policies into the equation (i.e. fuel neutral, size neutral). This means jurisdictions dont need to undo policy before they use it. The system is more flexible and a jurisdiction can simply apply their policies as part of their programs or activities.

    When a homes energy improves it can be expressed as a straight percentage. If a home goes from 100 to 75 the homeowner can easily see that it is a 25% improvement. Under the current system the general belief is that one EnerGuide point is a 1% change. That is incorrect, so it isnt clear to the homeowner (or other stakeholders) how much you have improved.

    Good design is reflected in the rating. Two houses that are the same except one has been built to take advantage of passive solar gains, that one will rate better.

    Finally, since there is a need to provide a reference point that gives an indication of the performance level of the house for comparison purposes there is a fulcrum that shows the rating of a the same house if it were built to code. (David note that the fulcrum may still change in some jurisdictions but this is where we are at right now).*The PAC also wants more information provided to the homeowner directly on the label. The label itself will help to increase energy literacy. It will also provide more details from awhich the consumer or regulator can extract the relevant information to them.

    The label is just one component of a package that would include a guide to the label and a homeowner information sheet as well as a web site with more information on the suite of services available through the EnerGuide Rating System. Of course the website will be continually under development over coming years as more and more information targetted specifically at applicable stakeholders is added. **In order to be able to serve as the backbone of all home energy policy and programming in Canada the PAC is recommending that the standard home evaluation be divided into a base rating and available add-on modules.

    The base rating would simply rate the actual performance of the house but would not provide any upgrade recommendations. The upgrade recommendations would be part of an add-on service that could be purchased in addition to the base rating. The reason for having a base rating that has no upgrade recommendations is to get the cost of a base rating down. Under mandatory labelling, where everyone is required to have their house rated when selling it, it has to be a very low cost. In many cases the seller will not care about upgrades and often wont even be home (done with the real estate agent). This split allows homeowners to choose just to have the house rated and nothing else. Of course in jurisdictions that dont have mandatory labelling the base rating and the upgrade recommendations can be bundled and only sold as a united package. The design of the system thus allows for the necessary flexibility. It should be noted that it was decided that the base rating should continue to have a blower door test.

    The other add-on services that will be offered are:a Construction upgrade service which will have the EA working with the builder (and/or homeowner) to develop a more efficient design for the new houseAn efficient living assessment which enable an EA to go through the house and do an evaluation based, not on standard operating conditions, but rather the actual operating conditions the homeowner uses (e.g. temperature set points, electricity usage, hot water usage). The EA will actually perform an electricity and hot water audit of the house. The full extent of the this add-on has not yet been defined.A construction blower door test. This is the blower door test that is done during construction to help educate the builder as to where leaks are in the house that can be fixed.

    Ive mentioned previously that it needs to be complimentary to code.Finally the PAC has recommended that GHGs be reported, on the label, and calculated regionally.*To meet the need to account for total on-site energy use and production the system will take into consideration the following items*In order to be able to compare one house with another it is important to rate the house and not how the homeowner operates the house. As such the rating will use standard operating conditions for such things as set point temperatures, hot water load and electrical load.

    However, there is one change from the current system. The PAC felt it was very important that homeowners understand (be educated on) the contribution electrical loads can make to the house energy consumption and in particular reward those...


View more >