What a winter site audit finds that a summer one misses | Overstory

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A frosty field with bare trees at dawn

11 February 2026

Heat leaks, idle compressors and the boiler nobody switches off.

Written by Helena Voss4 min

The number

11 percent

At one site these three came to 11 percent of the gas bill.

We prefer to audit factories in January.

What shows up in the cold

Loading doors open for whole shifts
Compressors running through the night for one valve
Heating fighting extraction in the same hall

At one site these three came to 11 percent of the gas bill.

Book a baseline callAll insights

An open book showing a photograph of a windswept tree

Next · ReportImpact report 2025: 2.1 million tonnes, counted twice

Insights

What we learn on client work, written down plainly: how to count, what to cut first and what a regulator will ask for.

An open book showing a photograph of a windswept tree

Report12 May 2026 · 9 minImpact report 2025: 2.1 million tonnes, counted twiceWhat our clients cut last year, how we measured it and where we were wrong.

Insights

What we learn on client work, written down plainly: how to count, what to cut first and what a regulator will ask for.

An open book showing a photograph of a windswept tree

Report12 May 2026 · 9 minImpact report 2025: 2.1 million tonnes, counted twiceWhat our clients cut last year, how we measured it and where we were wrong.

Insights

What we learn on client work, written down plainly: how to count, what to cut first and what a regulator will ask for.

An open book showing a photograph of a windswept tree

Report12 May 2026 · 9 minImpact report 2025: 2.1 million tonnes, counted twiceWhat our clients cut last year, how we measured it and where we were wrong.

Sun breaking over a misty field at dawn

Start here

Thirty minutes with a consultant. You leave with a rough footprint, the two biggest cuts and what a full pathway would cost.

01Company size

02What you need first

Your call: Pick a size and a service

Book a baseline callEmail us instead

No cost, no deck. Replies inside one working day.

Sun breaking over a misty field at dawn

Start here

Thirty minutes with a consultant. You leave with a rough footprint, the two biggest cuts and what a full pathway would cost.

01Company size

02What you need first

Your call: Pick a size and a service

Book a baseline callEmail us instead

No cost, no deck. Replies inside one working day.

Sun breaking over a misty field at dawn

Start here

Thirty minutes with a consultant. You leave with a rough footprint, the two biggest cuts and what a full pathway would cost.

01Company size

02What you need first

Your call: Pick a size and a service

Book a baseline callEmail us instead

No cost, no deck. Replies inside one working day.

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