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Calculate intensity using the matching floor area

About 11 minutes · 3 reading + 8 practice and checks
Time includes reading, practice, and questions. Extra videos or further study are optional.
See this course’s project requirements

A fictional building-energy brief with source/unit checks, whole-year site energy, floor-area intensity, fair comparison limits, anomaly questions and an evidence-based monitoring proposal.

Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.

What to include

  • Save audited annual energy inventory and excluded-meter list; include the original-case decision evidence and a separate changed-case result.
  • Save fuel-specific conversion ledger and site total; include the original-case decision evidence and a separate changed-case result.
  • Save site EUI with boundary/period/no score label; include the original-case decision evidence and a separate changed-case result.
  • Save bounded building comparison and needed peer data; include the original-case decision evidence and a separate changed-case result.
  • Save source/site scenario comparison with factor limitations; include the original-case decision evidence and a separate changed-case result.
  • Save building energy inventory/conversion/EUI/source/comparison brief; include the original-case decision evidence and a separate changed-case result.

Review and revise

Use these criteria to check your work and choose what to improve.

  • The final packet uses the supplied task-specific constraints and all six records agree.
  • Every result can be traced to an identifier, input, calculation or stated decision rule.
  • Changed-case practice updates dependent records and keeps holds or uncertainty visible.
  • The packet states the learner role, authority boundary and specific next verification needed before real work.
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Before you begin

The idea in everyday life

Original fictional workplace practice; paper or a local document is sufficient. The rules and records below are supplied for this exercise, not asserted universal workplace policy. Aspen A annual site 1,282,400 kBtu ,20,000 ft²gross floor area. Site EUI unit kBtu/ft²/year. Tenant-only floor area 15,000 ft²does not match whole building energy. No ENERGY STAR score is calculated.

The idea

Energy use intensity divides energy by the matching gross floor area and period; it is not an energy efficiency score or proof that two buildings have same use.

Follow along

Calculate intensity using the matching floor area — worked practice

Energy use intensity divides energy by the matching gross floor area and period; it is not an energy efficiency score or proof that two buildings have same use.

Aspen A annual site 1,282,400 kBtu ,20,000 ft²gross floor area. Site EUI unit kBtu/ft²/year. Tenant-only floor area 15,000 ft²does not match whole building energy. No ENERGY STAR score is calculated. Use paper or a local document. Preserve the original case and make a separate changed-case record.

  1. 1. Step 1

    Write energy period and gross-area denominator.

    You should see: 12 months and 20,000 ft²same A boundary.

    Keep the stated identifier, unit and policy alongside this result so another reader can check it.

  2. 2. Step 2

    Divide annual site energy by area.

    You should see: 1,282,400/20,000=64.12 kBtu/ft²/year.

    Keep the stated identifier, unit and policy alongside this result so another reader can check it.

  3. 3. Step 3

    Test the incorrect tenant-only denominator.

    You should see: 15,000 would give 85.4933 but mismatches boundary.

    Keep the stated identifier, unit and policy alongside this result so another reader can check it.

  4. 4. Step 4

    Save site EUI with boundary/period/no score label.

    You should see: 64.12 is an intensity, not official score or verified efficiency grade.

    Keep the stated identifier, unit and policy alongside this result so another reader can check it.

Now change one thing

Same energy serves verified gross area 22,000 ft². What is EUI rounded to two decimals?

Your work

What to finish

Save site EUI with boundary/period/no score label; include the original-case decision evidence and a separate changed-case result.

Common mistake

Watch for this

Using occupied area against whole building energy or calling a simple EUI an official performance certification.

How can I tell I understand it?

Using the supplied identifiers, I can save site EUI with boundary/period/no score label. My changed-case record names the revised condition and explains which dependent decision it changes.

Try 3 questions

Quick knowledge check

Answer all 3 questions. Get at least 2 right and the lesson completes automatically.

Not yet passed

You’ll get an explanation for each answer. Signed in? Your results save to your account.

1Aspen A EUI1,282,400/20,000 iswhat?
2Why is Aspen 15,000 ft²tenant denominator wrong for whole building energy?
3Does Aspen 64.12 constitute an official ENERGY STAR score?
0 of 3 answeredApply the lesson to a short question, then review the explanation.
3
Finish this lesson

Pass the check. We’ll save the progress.

Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.

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Sources and further reading

Explore the references behind this lesson.

What is Energy Use Intensity (EUI)? | ENERGY STAR
Source & access notes · checked 2026-10-01

Public agency or educational context; no source exercises are copied and no simulated threshold is presented as an official rule. Page title and relevant content inspected; no interactive controls or credential process tested.

Access: Readable official page retrieved with the web reader on 2026-10-01.

Reuse: All teaching cases, data, worked steps and questions are original. Link and limited paraphrase for context; no copied source exercises.

The Difference Between Source and Site Energy | ENERGY STAR
Source & access notes · checked 2026-10-01

Public agency or educational context; no source exercises are copied and no simulated threshold is presented as an official rule. Page title and relevant content inspected; no interactive controls or credential process tested.

Access: Readable official page retrieved with the web reader on 2026-10-01.

Reuse: All teaching cases, data, worked steps and questions are original. Link and limited paraphrase for context; no copied source exercises.

11-3013.00 - Facilities Managers
Source & access notes · checked 2026-10-01

Occupational task and responsibility context; the exercise policies and quantities are original fictional inputs. Page title and relevant content inspected; no interactive controls or credential process tested.

Access: Readable official page retrieved with the web reader on 2026-10-01.

Reuse: All teaching cases, data, worked steps and questions are original. Link and limited paraphrase for context; no copied source exercises.

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