Commercial kitchen · Netherbank · 2026
Make-up air for eleven kitchens under one roof
Cawdrey Gate Food Hall
A food hall replaces one kitchen extract with eleven, and the air those canopies pull out has to be put back. Untempered make-up air in July arrives at outside condition, and outside condition in a Sheffield summer carries about ten and a half grams of water in every kilogram of air.
The unit that answers that is the coil drawn on our home page. It is a six-row chilled-water coil on a 2,000 l/s make-up air unit, and it is doing two separate jobs at once: dropping the air from 28 °C to 12.7 °C, and taking 2.2 grams per kilogram of water out of it on the way. The second job is three-quarters of the drain load and a quarter of the duty.
What we changed on site was the drain. The unit had been specified before we were appointed and the drain was 22 mm, run level, into an unvented trap. Nineteen litres an hour has to go somewhere.
The coil on this job
Coil 01 — condensing
MUA-1, Cawdrey Gate
Make-up air, 100% outside air, six-row chilled-water coil at 6/12 °C.
| dry bulb | humidity ratio | RH | enthalpy | |
|---|---|---|---|---|
| Air on | 28 °C | 10.6 g/kg | 45% | 55.2 kJ/kg |
| Air off | 12.7 °C | 8.39 g/kg | 92% | 34 kJ/kg |
| Duty | 51 kW total | 37.7 kW sensible | 13.37 kW latent | SHR 0.74 |
| Condensate | 19.1 litres per hour to drain | |||
Same problem, different building?
Ring us or book the survey. Either way the first thing we do is measure what is actually happening in the room.