# How do I calculate the carbon footprint of a kitchen chimney?

Canonical: https://senseible.earth/answers/kitchen-chimney-carbon-footprint-per-unit

Add the steel or glass hood, motor and blower, filters and controls per chimney with supplier figures. Add sheet metal work, painting, assembly and testing energy, then divide by chimneys built.

## Bought-in parts

- Stainless or painted steel hood, or glass panel.
- Motor, blower and controls.
- Baffle or filter set and lights.

## Assembly

- Cutting, bending and welding of the hood.
- Painting or polishing.
- Assembly, suction testing and packing.

## Per unit

Report per chimney by width and suction rating.

## Worked example: kitchen chimney unit per unit (one month)

- Electricity: 10,000 kWh x 0.710 = 7,100 kg CO2
- Chimneys built: 3,000
- Plant total: 7,100 / 3,000 = 2.367 kg CO2 per unit
- Add hood steel, motor and filters for the full figure

Inputs are illustrative; use your own bills and production records.

## What Senseible does here

Senseible reads the plant's electricity bills (CEA grid factor 0.710 kg CO2 per kWh, CO2 Baseline Database version 21.0) and fuel invoices (IPCC 2006 defaults) into a fingerprinted Scope 1 and 2 record, the plant-level input to a per-unit figure. Bought-in materials go to the supplier evidence trail; product reports are self-declared drafts.

- [Product carbon footprint calculator](https://senseible.earth/calculators/product-carbon-footprint)
- [Stainless steel utensils footprint](https://senseible.earth/answers/stainless-steel-utensils-carbon-footprint-per-kg)
- [Electric motor footprint](https://senseible.earth/answers/electric-motor-carbon-footprint-per-unit)
- [Steel industry](https://senseible.earth/industries/steel)

Sources: [GHG Protocol Product Standard](https://ghgprotocol.org/standards), [ISO 14067:2018, Carbon footprint of products (iso.org)](https://www.iso.org), [IPCC 2006 Guidelines, Volume 2 Energy (fuel defaults)](https://www.ipcc-nggip.iges.or.jp/public/2006gl/vol2.html), [CEA CO2 Baseline Database, version 21.0](https://cea.nic.in/cdm-co2-baseline-database/?lang=en)

Last reviewed 2026-10-20.