epb/README.md

Energy performance of buildings

# Energy performance of buildings

This library provides helpers for energy performance of buildings computation.

## Installing

```sh
npm i epb
```

## Usage

### `energyClass`

Get the energy class (like `A++`, `A+`, `A`, `B`...) following the regulator rules, given the energy consumption.  
If the energy class cannot be calculated from the provided data, `null` is returned.

```js
const consumption = 100
const ecls = await energyClass('brussels', consumption)
// ecls === "C+"
```

### Regulators

Currently supported:

- `brussels`
- `flanders` (_exception: energy classes are not used in Flanders_)
- `france`
- `wallonia`

### `totalConsumption`

Get the total consumption of a building in a year, given its energy consumption and its total area.

```js
const consumption = 100
const area = 250
const total = totalConsumption(consumption, area)
// total === 25000
```