Industry code 35.300 · Oslo
Steam and air conditioning supply in Oslo
There are 40 active companies in steam and air conditioning supply in Oslo. No new companies have been registered in the last 12 months. Together they have 270 registered employees. The largest company is Hafslund Celsio AS with 265 employees. The oldest, Bogerud Varmesentral AS, was founded in 1965. 98% are limited companies.
- Active companies
- 40
- New in the last 12 months
- 0
- Registered employees
- 270
- Share of limited companies
- 98 %
The largest companies in steam and air conditioning supply in Oslo
Sorted by number of employees. Figures are from the Register of Legal Entities and the Register of Company Accounts.
| # | Company | Org. no. | Employees | Revenue | Founded |
|---|---|---|---|---|---|
| 1 | Hafslund Celsio AS | 977296919 | 265 | NOK 2.4 bn | 1997 |
| 2 | Saren Energy AS | 925200719 | 5 | NOK 475.8 m | 2020 |
| 3 | Diakonhjemmet Energisentral AS | 823749112 | – | NOK 9.5 m | 2019 |
| 4 | Slemmestad Energi AS | 825901272 | – | – | 2020 |
| 5 | Kht Consulting AS | 914397472 | – | NOK 1.6 m | 2014 |
| 6 | Saren Infrastructure AS | 916558627 | – | NOK 475.8 m | 2015 |
| 7 | Sarpsborg Infrastructure AS | 916776373 | – | – | 2016 |
| 8 | AS Ammerud Varmesentral | 920474659 | – | NOK 16 m | 1969 |
| 9 | Myrvoll Energi AS | 920676650 | – | NOK 3.5 m | 2018 |
| 10 | Nk Energieiendom Drift AS | 921220286 | – | NOK 41.3 m | 2018 |
| 11 | Tokerud Varmesentral AS | 921587775 | – | NOK 18.7 m | 1971 |
| 12 | Billingstad Energi AS | 921660944 | – | NOK 8 m | 2018 |
| 13 | Bogerud Varmesentral AS | 921773331 | – | NOK 9.8 m | 1965 |
| 14 | Fyri Energi AS | 923211772 | – | NOK 2.9 m | 2019 |
| 15 | Cm District Energy Norway AS | 924368195 | – | – | 2019 |
| 16 | Cm District Energy Norway Holding AS | 924601213 | – | – | 2020 |
| 17 | Haakonsvern Energi AS | 925263036 | – | NOK 11.1 m | 2020 |
| 18 | Hovinbyen Energy Hub AS | 925628468 | – | NOK 3.5 m | 2020 |
| 19 | Sov Eiendom AS | 927676893 | – | NOK 29.4 m | 2021 |
| 20 | Bispevika Energisentral AS | 927968045 | – | NOK 4.5 m | 2021 |
| 21 | Silver Retail AS | 928122573 | – | – | 2021 |
| 22 | Saren Midco AS | 929418468 | – | – | 2022 |
| 23 | Abp Energitunnel AS | 929914368 | – | – | 2022 |
| 24 | Abp Fjernvarme Drift AS | 929919688 | – | – | 2022 |
| 25 | Lilleaker Energi AS | 930384186 | – | NOK 600k | 2022 |
Newest companies in steam and air conditioning supply in Oslo
- Saren Interco AS2 Oct 2025
- Svas Topco AS21 Aug 2025
- Svas Midco I AS4 Jul 2025
- Svas Midco Ii AS4 Jul 2025
- Svas Bidco AS4 Jul 2025
- Geoheat AS4 Nov 2024
- Furuset Bergvarme AS21 Apr 2023
- Lilleaker Energi AS8 Dec 2022
- Abp Fjernvarme Drift AS24 Sept 2022
- Abp Energitunnel AS23 Sept 2022
Frequently asked questions
How many companies in steam and air conditioning supply are there in Oslo?
The Register of Legal Entities lists 40 active companies in steam and air conditioning supply in Oslo. No new companies have been registered in the last 12 months.
Which is the largest company in steam and air conditioning supply in Oslo?
Hafslund Celsio AS is the largest by number of employees, with 265 employees. The organisation number is 977296919.
How many people work in steam and air conditioning supply in Oslo?
The companies have 270 registered employees in total. The figures are based on employee counts in the Register of Legal Entities, and 2 of the 25 largest companies have reported employees.
How long have there been companies in steam and air conditioning supply in Oslo?
The oldest active company, Bogerud Varmesentral AS, was founded in 1965. 98% of the companies are limited companies.
Source: the Register of Legal Entities and the Register of Company Accounts. The overview shows active companies registered in the municipality with industry code 35.300. Figures are updated continuously.