2019.008 TEUI Calculator (kWh/m2*yr)

We have made this handy calculator that lets you determine the energy performance of your home or building in the units of the most widely used Building Energy energy metric, the TEUI or Total Energy Use Intensity. The units are the amount of all energy sources in Kilowatt Hours (ekWh – where e stands for equivalent) required as a function of building area in square metres per year: kWh/m2/yr. Simply fill in the fields to the best of your knowledge below and the calculator converts all of the units for you. Conversion references are provided in the footnotes below. Here is what you should expect as a range:

  • 1995 Canadian National Household Average: 325 kWh/m2/yr
  • 2015 Canadian National Household Average: 203 kWh/m2/yr
  • 2019 An Average Ontario House with Eco-conscious users: 130 kWh/m2/yr
  • 1996 An Off-Grid R2000 House in Germany: 36 kWh/m2/yr
  • 2012 A Passive House Level Building in Quebec: 49 kWh/m2/yr
  • 2019 Passive House Requirements: ~90 kWh/yr (15 TEDI + 75PER)

Happy crunching!


A wee blurb on how this all gets calculated and the references and units used. If you’d like to see a graphic representation of these kinds of results please visit our blog post: https://www.andythomson.ca/2018/11/20/how-many-miles-per-gallon-does-your-building-get/

  • Conversion of Natural Gas to Gigajoules (m3 to GJ) multiply m3 by 0.0373 (source: https://www.nrcan.gc.ca/energy/natural-gas/5641#conversion)
  • Conversion of GigaJoules to kWhr (GJ>kWh) multiply GJ by 277 (source: https://www.nrcan.gc.ca/energy/natural-gas/5641#conversion)
  • Conversion of Square Feet to Square Metres: Multiply sf by 10.7639
  • Conversion Factor for MTCO2 from m3 of natural Gas (Direct & Inderect) Multiply m3 by 0.00263 (Source: Environment Canada, Emission Factors from Canada’s GHG Inventory. Available at: http://www.ec.gc.ca/ges-ghg/)
  • Calculate your Carbon Footprint from Electricity (Ontario only) Multiply kWh by 0.00004 (Source: https://calculator.carbonfootprint.com/calculator.aspx?tab=2)
  • Wood heat conversion factor: 1,000kWh/m3 (Source: http://seacourse.dk/wiki/tiki-index.php?page=Calculating+in+KWh)
  • Convert GtCarbon to CO2ppm Atmospheric: 1ppm = 7.81GtCO2 and 1ppmCO2a = 2.13Gt unburned carbon. (Sourcehttps://www.skepticalscience.com/print.php?r=45 )
  • 2795Gt of Carbon then equates to 1312.2ppmCO2a (‘business as usual’ case scenario per IPCC RCP8.5, 2018)
  • *2795Gt is the worst case TOTAL scenario for 5ºC of warming (per ICPP RCP8.5), and 15% of 2795Gt is 419.25Gt CO2 (the percentage attributable globally to buildings). This by the way is an endgame scenario – and would lead to runaway warming. So if everyone lived like me, we’d hit that ceiling in the number of years indicated above. Fortunately for all of us, development does not happen so fast, especially due to climate change itself.
  • Canadian Residential Sector Energy Use: http://oee.nrcan.gc.ca/corporate/statistics/neud/dpa/showTable.cfm?type=CP&sector=res&juris=ca&rn=1&page=0

5 thoughts on “2019.008 TEUI Calculator (kWh/m2*yr)

  1. Questions for the OAA TEUI Calculator RFQ:

    1. Dates: in the Timeline section, the RFQ notes that all submissions are due July 31, 2020; however, it also notes in the following paragraph that the awarded party will be announced July 20, 2020. Please clarify the closing and award dates.

    2. Coding language: The RFQ notes under section D. Project Scope, that “an approach using D3/Javascript will be given preference”. While fluent in these languages, we are curious to know if the OAA will consider other languages that could be well-suited for this project if proper rational is provided?

    Thank you and best regards,


  2. Hi Daniel,

    1. Check the OAA site, an addendum was added with corrected dates = but they just launched a new website today so the URI has probably changed. The text in the most recent OAA newsletter says: “Interested parties must reply to the RFQ by Friday, July 31, 12:00 pm noon.”

    2. Any responsive/dynamic/animated coding would be acceptable. There are other legacy projects in D3 which is why we had considered this – they may marry together someday. If a non D3 approach is less expensive – you could provide a breakout price for it.

  3. Re. ‘Data Validation’ – The person using the calculator is responsible for the accuracy of the input data. Licensed, professional architects are required to calculate areas accurately. Reading energy bills can be somewhat confusing, we may need to show some screenshots of typical energy bills in Ontario to indicate the requirements. There are always the outlier cases where an owner is in Florida for a Winter and so their Winter loads are artificially low. This, and intentional fudging of numbers may occur. It’s something we can refer to in the final terms of use, that practitioners take responsibility for the TEUI they are reporting, just as with any code or other building related metric we require to stand behind.

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.