Industrial HVAC

Industrial HVAC is not comfort cooling. On a production site the plant exists to hold a process inside a tolerance — a chilled water circuit feeding moulding tools, an extract system pulling fume off a line, a plantroom keeping a cold store or a test area within spec. Failure gets measured in scrapped batches and idle shifts, not in complaints about a warm office. We work on industrial premises across Newbury, Thatcham, Hungerford and the wider A34 and M4 corridor into North Hampshire and South Oxfordshire, on plant that has to keep running.

Specification starts with the process rather than the floor area. The questions that matter are what the load genuinely is, how much of it happens at once, what the plant does when ambient reaches the top of a Berkshire summer instead of the nominal rating condition, and what the site does if a machine trips at three in the morning. Those answers decide whether one larger chiller or two smaller machines in a duty and assist arrangement is right, whether glycol is warranted and at what concentration, and whether free cooling coils earn their space.

Plantrooms fail on layout at least as often as on equipment. Pumps fitted with no room to withdraw a motor, valves buried behind a header, no drain point at the low end, strainers that can only be cleaned by dismantling something else — these are what turn a two-hour job into a lost shift. When we design or rework a plantroom, access and isolation come first: duty and standby sets individually isolated, commissioning valves that can actually be read, labelled headers, and a viable lifting route for anything heavier than one person can carry.

Large extract behaves nothing like office ventilation. Capture at source beats dilution almost every time, but only when the hood, the duct velocity and the fan curve are matched — undersized ductwork on a long run quietly strangles a fan and nobody notices until throughput drops. Make-up air is the part most often forgotten: pull several cubic metres per second out of a building and something has to replace it. Where extract serves a substance hazardous to health, COSHH requires thorough examination and testing at least every fourteen months, so alterations have to be planned around it.

Most industrial work is dictated by the shutdown window rather than by the job. We plan tie-ins around the production calendar — maintenance weeks, bank holidays, night shifts — and pre-fabricate as much as possible away from the live area so time on the critical path is spent connecting rather than measuring. Isolation valves fitted during an earlier phase let later work happen on a section instead of a whole circuit, and temporary hire chillers or fans can bridge the gap where a process genuinely cannot pause.

Planned maintenance on industrial plant should follow run hours, not the calendar. Equipment running eight thousand hours a year works through filters, belts, bearings and compressor oil at intervals a nine-to-five office unit never approaches, and the trend matters more than any single reading — superheat drifting across three consecutive visits says far more than one snapshot. GB F-Gas rules add a separate legal duty, setting leak-check frequency by the CO2 equivalent of the charge, so one large chiller can carry a heavier obligation than a dozen small splits.