# Bucharest thermal network modernization

> Live situation record from CLSTR: https://clstr.news/situations/bucharest-thermal-network-modernization
> Updated: 2026-10-23T07:38:24.000Z. Sources: 11. Developments: 3.

Termoenergetica has initiated modernization projects on the primary thermal network in Bucharest, specifically targeting Sectors 4 and 5. These infrastructure works are funded by the state budget and European funds under the POIM rehabilitation program.

The modernization efforts involve installing new pipes and connecting them to the existing network, which will cause temporary hot water outages for approximately 1,840 apartment blocks. In Sector 5, works near the Nuțu Ion Street and Drumul Taberei intersection involve a 600 mm diameter primary pipe and are scheduled from September 28 to September 30, with service restoration expected by October 3. In Sector 4, the project involves a 1,100 mm main pipe affecting roughly 1,100 blocks until October 9.

Further maintenance is scheduled for late October in Sector 4. From October 26 to October 30, approximately 166 apartment blocks near Constantin Brâncoveanu Boulevard will face a temporary loss of hot water and heating. This intervention involves connecting modernized pipes to the existing network and replacing an underground chamber, requiring the shutdown of 17 thermal points. Supply will be restored in stages as work is completed.

Bucharest Mayor Ciprian Ciucu has warned that the capital’s heating and hot water supply remains highly vulnerable due to aging infrastructure. He stated that residents should expect continued service disruptions for the next 15 to 20 years, noting that the network has exceeded its lifespan. While the system is approximately 94% functional, the Mayor highlighted that Sectors 3 and 4 face higher risks due to delayed intervention permits. Despite these systemic challenges, officials indicated that heating and hot water bills are expected to remain unchanged for the upcoming winter.

## Timeline

### 2026-10-23: Bucharest heating system faces long-term vulnerabilities

Bucharest Mayor Ciprian Ciucu warns of heating vulnerabilities for the next two decades. Meanwhile, Sector 4 will face a five-day thermal supply suspension starting October 26 for network modernization.

7 sources. https://clstr.news/cluster/bucharest-heating-works-to-affect-166-apartment-blocks

### 2026-09-28: Bucharest thermal network modernization to affect 1,800 blocks

Over 1,800 apartment blocks in Bucharest's Sectors 4 and 5 will face hot water outages starting September 28 due to major thermal network modernization works by CMTEB.

2 sources. https://clstr.news/cluster/bucharest-thermal-network-modernization-to-affect-1800-blocks

### 2026-09-23: Termoenergetica announces heating network works in Bucharest and Ploiești

Termoenergetica is conducting thermal network upgrades in Bucharest's Sectors 4 and 5, affecting nearly 2,000 blocks, while Ploiești prepares for the upcoming heating season.

3 sources. https://clstr.news/cluster/termoenergetica-announces-heating-network-works-in-bucharest-and-ploieti

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Cite as: Bucharest thermal network modernization. CLSTR, https://clstr.news/situations/bucharest-thermal-network-modernization