This scenario assumes the repair directly defers a replacement purchase.
Impact methodology
How the Repair Impact estimate works.
Version 1.0.0, reviewed 2026-09-01. This page records the model's sources, assumptions, illustrative communication range and limits.
Use the calculator01 — Formula
A straightforward comparison, not a lifecycle assessment.
Indicative CO₂e impact deferred
= annualised manufacturing impact × selected life-extension years × decision weighting × quantity
− estimated technician travel impact
Manufacturing impact is annualised using the source's representative product life. The calculation is capped at that reference life. Travel is applied once to the selected total service journey, even when multiple items are repaired during that visit.
02 — Product factors
Published category averages.
| Category | Manufacturing | Reference life | Representative mass proxy | Source |
|---|---|---|---|---|
| Washing machine | 341.0 kg CO₂e | 12.0 years | 65.0 kg (Washing machine) | Impact CO₂ / ADEME |
| Dishwasher | 271.0 kg CO₂e | 12.0 years | 47.0 kg (Dishwasher) | Impact CO₂ / ADEME |
| Refrigerator | 257.0 kg CO₂e | 10.0 years | 51.0 kg (Fridge-freezer) | Impact CO₂ / ADEME |
| Electric oven | 218.0 kg CO₂e | 12.0 years | 56.0 kg (Electric cooker) | Impact CO₂ / ADEME |
| Laptop | 182.0 kg CO₂e | 5.0 years | 3.0 kg (Laptop) | Impact CO₂ / ADEME |
| Smartphone | 79.3 kg CO₂e | 2.5 years | 0.5 kg (Mobile phone) | Impact CO₂ / ADEME |
| Television | 328.0 kg CO₂e | 8.0 years | 22.0 kg (40–46 inch display) | Impact CO₂ / ADEME |
Product manufacturing factors are representative Impact CO₂ / ADEME category data. Product mass uses the closest suitable category from Merseyside Recycling and Waste Authority average weights as a transparent proxy. For example, the refrigerator manufacturing factor uses a fridge-freezer mass proxy, and the electric-oven factor uses an electric-cooker mass proxy. These values are not measurements of the user's item.
03 — Travel factor
A UK-oriented service-visit deduction.
The calculator converts the selected total mileage to kilometres and applies 0.16152 kg CO₂e per km. The factor represents an average petrol car and comes from the UK Government GHG Conversion Factors 2026.
It does not model vehicle type, traffic, routing, parts delivery, repeat visits or journeys shared across multiple jobs.
Optional DVLA work-vehicle data is kept separate from this model. A DVLA recorded CO₂ value is a vehicle tailpipe rate, while this calculator uses a representative UK travel CO₂e factor; they are not interchangeable and are not added together.
In summary: product manufacturing factors use representative Impact CO₂ / ADEME data, while technician travel uses a UK 2026 government conversion factor. This is an indicative eServUK V1 model, not an item-specific UK lifecycle analysis.
04 — eServUK assumptions
Decision weightings distinguish the selected scenario.
This scenario reduces the estimate because the final decision is not yet certain.
This scenario uses a cautious weighting while repair feasibility remains unknown.
These weightings are transparent eServUK V1 modelling assumptions, not published probabilities of repair success.
05 — Illustrative comparison
Tree growth as a scale comparison.
The in-conversation card divides its indicative CO₂e impact by 60.0 kg CO₂ per tree-year. This uses the U.S. EPA Greenhouse Gas Equivalencies Calculator — urban tree seedlings grown for 10 years, which publishes 0.060 metric tonnes CO₂ per urban tree per year for its urban-tree-seedlings-grown-for-10-years scenario.
This is an illustrative scale comparison only. It does not represent trees planted by eServUK or the customer, carbon removal delivered, or offsets purchased. Comparison method DEC-073, reviewed 2026-09-09.
06 — Limitations
Use the result as an order of magnitude.
- The model does not assess the actual fault, parts, materials or repair energy.
- It does not compare the in-use energy efficiency of the current and replacement products.
- It does not account for refrigerant leakage, hazardous materials or specific disposal routes.
- Potential product mass kept in use is a representative proxy, not a verified recycling or landfill outcome.
- The ±35% band is an illustrative communication range. It is not derived from a probability distribution.
- Safety, compliance and reasonable repairability take priority over an estimated environmental benefit.
Not certified carbon accounting.
The calculator is public decision support. It must not be used as an official carbon inventory, offset claim, product environmental declaration or proof that a specific repair has reduced emissions.