What Is a Square Cooling Tower?
A square cooling tower is a rectangular-frame, crossflow-style industrial cooling tower: hot process water is distributed across the top of a fill pack while air is drawn horizontally through it by an induced-draft fan. The square/rectangular casing makes it easy to bolt several identical cells side by side, which is why this is the design most manufacturers reach for once a plant's cooling load outgrows a single small unit.
It does the same basic job as any other cooling tower -- removing waste heat from condenser water, chillers or a process heat exchanger by evaporating a small percentage of the circulating water -- but the square/multi-cell layout is specifically about scaling that job up cleanly as a plant grows.
FRP vs Concrete Construction
GEM builds square towers in two structural materials, and the right one depends on scale and site conditions rather than performance alone:
- FRP (fibre-reinforced plastic) casing -- corrosion-free, lightweight, faster to install, and needs no repainting. This is the practical choice for most single- and small multi-cell installations.
- RCC / concrete construction -- used at the large end of the range (multi-cell banks well above a few hundred TR), where a poured or precast concrete basin and cell walls are more economical and more serviceable over a multi-decade plant life than a very large FRP structure.
Single-Cell vs Multi-Cell: Which Do You Need?
A single cell is the right answer when one tower comfortably covers the plant's peak heat load with some margin for a hot day. Multi-cell (two, three or more identical cells sharing a common basin and header) becomes the right answer once any of the following applies:
- The total load exceeds what a single practically-sized cell can handle.
- The plant cannot tolerate a total loss of cooling if one cell is down for maintenance -- with multiple cells, the others keep running while one is serviced.
- The site expects future expansion; adding a matching cell later is simpler than replacing an undersized tower.
GEM's Square Cooling Tower Range
GEM's Square Cooling Tower line covers 100 TR to 1,000 TR per cell, offered in single-cell and multi-cell configurations, and in standard, high-temperature and low-noise (quiet) build variants -- the same engineering choices covered in detail in our GCT vs SCT series guide, which walks through GEM's high-temperature, quiet and heavy-duty tower families.
If your process doesn't need a square/crossflow footprint specifically, it's worth comparing against GEM's Bottle Cooling Tower (a lightweight FRP round design for smaller, single-unit loads) or Cross Flow Cooling Tower (closed-circuit design that keeps the process fluid isolated from the open evaporative circuit) before deciding.
Frequently Asked Questions
What capacity range do square cooling towers cover?
GEM's square cooling towers are built from 100 TR up to 1,000 TR, and multi-cell configurations extend beyond that by adding identical cells on a shared basin.
Is FRP or concrete better for a square cooling tower?
FRP is lighter, corrosion-free and faster to install, and covers the great majority of installations. Concrete/RCC construction is generally reserved for the largest multi-cell banks, where it works out more economical and easier to service long-term.
When should I choose multi-cell over a single large cell?
Choose multi-cell when the load exceeds a practical single-cell size, when the plant cannot afford a total cooling outage during maintenance, or when future capacity expansion is expected.
Explore GEM's cooling tower range:
