Specialist building services piping since 1991

Experience on projects that matter.

A selection of Rennsli's projects over the years, from Alþingishúsið to Hyatt Centric and Hellisheiðarvirkjun.

Nationwide reach

Projects across Iceland

From the capital region to Borgarfjörður and Breiðafjörður. Select a location on the map to see the projects there.

All projects

Grensás, Landspítali Healthcare

Grensás, Landspítali

Complete plumbing and medical gas systems (ISO 7396-1) for a new rehabilitation ward, including BREEAM commissioning and handover.

Ístak 2024
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Hyatt Centric, Laugavegur 176 Hotels

Hyatt Centric, Laugavegur 176

Domestic water, drainage and sprinkler systems for a 172-room hotel in the heart of the city.

Ísfast 2025
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Alþingishúsið Public buildings

Alþingishúsið

Building services piping in Alþingishúsið, a heritage-protected building in full operation. A focus on careful workmanship and conduct on site.

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Hellisheiðarvirkjun Energy & utilities

Hellisheiðarvirkjun

Piping and systems in one of the country's largest geothermal power plants. Experience with large industrial and energy facilities.

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Reykjavik Edition Hotels

Reykjavik Edition

Piping systems and sprinkler systems for an international luxury hotel.

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VON Guldsmeden Hotels

VON Guldsmeden

Domestic water and drainage for a hotel.

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Fosshótel Reykholt Hotels

Fosshótel Reykholt

Piping systems for a hotel in rural Iceland.

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Hótel Flatey Hotels

Hótel Flatey

Building services piping for a hotel.

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RR hótel, Veghúsastíg Hotels

RR hótel, Veghúsastíg

Piping systems for a hotel in the city centre.

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ION Hótel, Nesjavöllum Hotels

ION Hótel, Nesjavöllum

Piping systems for a hotel at the edge of the highlands.

2023
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Dómkirkja Íslands Public buildings

Dómkirkja Íslands

Building services piping in a heritage-protected church building.

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Þjóðminjasafnið Public buildings

Þjóðminjasafnið

Piping systems in a museum building with demanding requirements.

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Þjóðmenningarhúsið Public buildings

Þjóðmenningarhúsið

Building services piping in a historic building.

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Menntaskólinn í Reykjavík Public buildings

Menntaskólinn í Reykjavík

Piping systems in a school building.

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Stýrimannaskólinn Public buildings

Stýrimannaskólinn

Building services piping in a school building.

2025
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Borgarnes íþróttahús Public buildings

Borgarnes íþróttahús

Piping systems for a sports facility.

Ístak 2025
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Þýska sendiráðið Public buildings

Þýska sendiráðið

Building services piping for an embassy.

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Smárabíó Public buildings

Smárabíó

Piping systems for a cinema.

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Hringhamar 10–14 Residential

Hringhamar 10–14

Plumbing, fire protection and piping systems for an apartment building.

VHE 2025
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Laugavegur 182 Residential

Laugavegur 182

Piping for an apartment building.

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Tryggvagata 13 og 19 Residential

Tryggvagata 13 og 19

Piping systems for an apartment building in the city centre.

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Kleppsvegur Residential

Kleppsvegur

Plumbing and snow melting for an apartment building.

Ístak 2024
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Helluvað Residential

Helluvað

Piping for a residential development.

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Skessuhorn Residential

Skessuhorn

Piping systems for a residential project.

2023
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Orkuveita Reykjavíkur, innanhúsfrágangur Energy & utilities

Orkuveita Reykjavíkur, innanhúsfrágangur

Internal piping installations for a utility company.

2024
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ON rammasamningur Energy & utilities

ON rammasamningur

Framework agreement with a focus on BREEAM and the Nordic Swan Ecolabel.

2024
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Laugardalslaug Swimming pools

Laugardalslaug

Piping systems for one of the country's busiest swimming pools.

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Sundlaug Garðabæjar Swimming pools

Sundlaug Garðabæjar

Piping and systems for a swimming pool.

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