Worked examples

WORKED EXAMPLES

See the working, not just the answer.

Three worked examples on made-up buildings. Each one gives you the answer, then every step of the sum, where each number came from and how solid it is.

FreeNo accountAbout two minutes eachNothing you type leaves your device

How every example works.

  1. 1

    Describe a made-up building

    Floor area, energy bills, what the walls and heating are like. Start from the example, or change any box.

  2. 2

    Get the answer straight away

    The year it falls off its carbon path, where the money goes, what pays back first.

  3. 3

    Open the working

    Every step of the sum, with its source and how solid it is: Verified, Industry, Estimate or Judgement.

Example 1 · carbon path
The carbon path example: a chart showing an office crossing its carbon limit in 2032
About 2 minutesFreeEvery step shown

When does this building fall off its carbon path?

Lenders and investors test buildings against CRREM, the carbon limit for each type of building, year by year to 2050. See the year an example building goes over, and what a heat pump would change.

You type
Floor area, and a year of electricity and gas from the bills.
You see
The year it crosses the limit, a chart to 2050, every step of the sum, and the heat pump comparison.
About 2 minutesFreeEvery step shown

Before a BER upgrade: where does the money go?

Before anyone pays for a survey, see which upgrade measures an example building would typically need, in the order they are usually done, and roughly what each tends to cost.

You type
Floor area, and what the walls, windows, roof, heating and lighting are like now.
You see
A low-to-high budget, a picture of where the money goes, and why the order of the work matters.
Example 2 · upgrade budget
The upgrade budget example: a bar showing most of the money goes on walls, windows and roof
Example 3 · quick wins
The quick wins example: bars showing an energy bill shrinking step by step
About 2 minutesFreeEvery step shown

Which energy savings pay back first?

Rank the low-cost ways to cut an energy bill by how quickly each pays for itself, with each saving taken from the bill that is left, so the total is counted honestly.

You type
Floor area, the yearly energy bill, and how the building runs.
You see
Each measure with its cost, saving and payback, and the bill shrinking step by step.

Honest about the edges.

These are teaching examples on made-up buildings. Their figures are rules of thumb and published averages, each labelled with how solid it is. They are not advice, a design, a survey, a quote or a valuation.

Before you act on anything about a real building, ask a qualified engineer who has seen it. Legacy Business Engineers provides training and software. It does not provide engineering design services.

Where this is going.

The Glass Engine, in development, will apply the same method to real building services options: compare them, pick the strongest, and show every step behind the pick.

About the Glass Engine

Learn the whole method.

DC-LEARN teaches it on one building, step by step. The first three modules are free.