Ventilation Blocks: What They Are For and How to Choose

A ventilation block is a precast reinforced-concrete element with ready-made vertical ducts for natural ventilation and smoke removal in multi-storey buildings. The blocks are installed floor by floor, and the ducts join into a continuous shaft without on-site bricklaying.

What they are for

• Remove stale air from kitchens, bathrooms and utility rooms.
• Form a ready ventilation shaft — no manual duct bricklaying on site.
• Factory duct geometry gives stable draught.
• Fire-resistant and durable, with no maintenance needed inside the shaft.

Duct types

There are blocks with satellite ducts (a satellite duct on each floor connecting to a collective duct) and blocks with collective through ducts. The choice depends on the number of storeys and the project ventilation scheme.

How to choose

• Number of storeys and the ventilation scheme in the project.
• Number and purpose of ducts — exhaust, smoke removal.
• Floor height (to match the block height).
• Compatibility with floor slabs and other precast elements.
• Project and current code requirements.

Advantages of the precast solution

• Fast crane installation together with the building shell.
• Factory quality and precise duct geometry.
• Fewer wet processes on site.
• Durability of reinforced concrete.

We will select a ventilation-block size for your project and arrange production and delivery — contact PVK Arsenal.