Grün Engineering
Generator building with four exhaust stacks on a coastal site at dusk
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Flagship project Generator exhausts GE2953, GE4024

Applecross salmon farm

Four Ø400 generator exhausts and silencers from one plantroom on the west coast of Scotland.

Site
Applecross salmon farm
Town
Kishorn, Scotland
Sector
Aquaculture
Status
Complete

Key facts

generator sets, 1,400 kVA each
4
twin wall exhaust, 25 mm insulation, rated 600°C
Ø400
silencers, Ø1,080 x 2.8 m, on frames we made
4
on site, 5 to 14 November 2024
2 weeks
progress reports with photos
Daily

The challenge

A new salmon farm on Loch Kishorn makes its own power. Four generators sit in one plantroom, and each needs an exhaust out through the roof.

It is one of our most remote sites. Materials, the cherry picker and the lifting team all came in on the single-track coast road.

Roof work had to carry on through persistent heavy rain.

What we did

Four separate Ø400 routes with test points and tee caps, grouped through the roof onto cantilever brackets.

The silencers sit on frames we made over the generator sets, lifted in with the lifting team on site.

The runs hang on strut channel and rod from the roof steels.

A chop saw station inside the plantroom kept cutting quick and the site tidy. We adjusted the roof method to suit the weather.

The result

The main install took two site weeks in November 2024.

Final connections were made once the generators were set. In December 2025 we fitted two elbows cut to suit, sealed the V band joints and lagged all eight elbow sections.

Certificate of conformity issued on 16 December 2025.

On site.

7 photographs. Tap a photo to see it larger.

Applecross salmon farm, Kishorn. The plantroom block and its four stacks at dusk.
Applecross salmon farm, Kishorn. The four risers above the roof on cantilever brackets.
Applecross salmon farm, Kishorn. The generator room with exhausts and silencers in place.
Applecross salmon farm, Kishorn. Four insulated exhaust runs at high level.
Applecross salmon farm, Kishorn. Inspection tees with caps where each run turns up into its riser.
Applecross salmon farm, Kishorn. A silencer on its frame above the generator.
Applecross salmon farm, Kishorn. Lagged flexible connection from the engine up to the silencer.

The drawing.

From our 3D model.

Labelled isometric drawing of four generator sets, four silencers on frames and four Ø400 stacks rising through the roof
Isometric from our 3D model, built off drawing 001 and the completion photos.

Finishing details

The details we leave behind.

  • Capped inspection tees on exhaust runs

    Test points and tee caps

    Each route has test points, and a tee cap where it turns up into its riser.

  • Silencer on a galvanised frame

    Silencer frames

    Each silencer sits on a frame we made over its generator set.

  • Lagged flexible exhaust connection

    Lagged connections

    Flexible connections from each engine, lagged. All eight elbow sections on the final connections lagged too.

  • Four stacks above a clad roof

    Cantilever brackets

    The four risers are grouped above the roof on cantilever brackets.

Handover

What the client got.

The documents on record for this job. Handover documents normally go into the customer's project folder before the engineers get home.

  • Design and GA drawingDrawing 001
  • Daily progress reportsWith photos, from site
  • Progress report, final connections16 December 2025
  • Certificate of conformity16 December 2025

Related services

Generator exhausts and silencers Steelwork and supports Design and calculations

Short job records: GE4024.

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