62%
of each fitting reused, by weight
Remanufacture · Sheltered housing
Trust Housing Association, Mission Place
Communal lighting renewal in an occupied sheltered housing scheme, with every fitting position surveyed and recorded before anything was specified.
19.9 kgCO₂e
embodied carbon retained per fitting. Self-assessed to CIBSE TM65:2020
The appraisal
Every position assessed before anything was specified
Mission Place is a Trust Housing Association sheltered housing development in Motherwell. We surveyed the communal areas position by position — two floors, seven hallways, stairwells and two common rooms — and recorded every fitting individually before specifying anything.
The appraisal reached a different answer in almost every room. Where the existing fitting was an ASD Harmony and was worth keeping, we remanufactured it: the original aluminium housing and polycarbonate diffuser retained, everything inside replaced, built to a 26-point specification with a verification method against every requirement.
Where it was not worth keeping, we specified bought-in replacements by name — and in two positions specified new product in preference to a remanufactured one.
Occupied building
Installed and certified circuit by circuit
Installation ran circuit by circuit in an occupied building, with residents at home throughout and no decant. We issued 47 Minor Works Certificates and a BS 5266-1 emergency lighting completion certificate with the full compliance checklist completed, not simply signed.
A year later the same remanufactured product was specified again for a second Trust Housing scheme.
Embodied carbon
What the carbon figure does and does not mean
19.9 kgCO₂e is embodied carbon retained — the carbon in the housing and the diffuser we did not have to make again. It is not an operational energy saving.
A remanufactured fitting and an equivalent new one draw the same load, so the energy saving at Mission Place came from replacing what was there before, which is a different comparison against a different baseline. If you have a carbon figure to publish, you need to know which of the two you are quoting. We will tell you which.
The evidence behind the figures
Where these numbers come from
| Figure | What it rests on | Status |
|---|---|---|
| 62% of each fitting reused by weight | Bill of materials within the TM65 calculation; component weights measured | Measured |
| 19.9 kgCO₂e retained per fitting | Embodied carbon calculation to CIBSE TM65:2020, mid-level method, 1.3 buffer factor | Self-assessed, May 2023 |
| 26-point specification with a verification method against every requirement | Approved remanufacturing specification, 18 May 2023 | Specified |
| 47 Minor Works Certificates | Project handover file — 40 internal, seven external | Certificates issued |
| BS 5266-1 completion certificate with the checklist completed | Emergency Lighting Completion Certificate 107-ML1-11112024RH, 11 November 2024 | Certificate issued to the client |
| Specified again for a second Trust Housing scheme | Procurement schedule, 27 September 2024 | Purchasing record |
| Survey of every position | Lighting survey record, 13 September 2023 | Primary record |
Open evidence pack
Every figure here sits on a dated project record
The full case study sets out the specification, the conformity assessment, the certification and the carbon calculation, and names the source document behind every figure.
Download the Mission Place case study (PDF) ↓
Conversation, not tender
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