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Frequently Asked Questions
How is a modular unit specified?
By choosing sections and their order.
Mixing, filtration, coils, humidification, recovery, fan.
The sequence is part of the decision.
There is no model number to select from a range.
The duty determines what appears in the unit.
Why does this suit demanding applications?
Because the requirement is met by selection.
A laboratory and an office use the same catalogue.
So do a pool hall and a cleanroom.
Nothing has to be found that happens to fit.
Unusual duties stop being a problem.
Why does the casing matter so much?
It cannot be changed once the unit is built.
Thermal transmittance affects surface temperature.
Thermal bridging can create condensation on the outside.
Leakage lets the fan's work escape before the duct.
Deflection decides rigidity at operating pressure.
Can casing performance be compared between suppliers?
Yes, because the figures are classified.
They are declared values, not descriptive claims.
Transmittance, bridging, leakage and deflection all have classes.
That makes a direct comparison possible.
Ask for the classification, not an assurance.
How does delivery affect the design?
The unit must physically reach the plant room.
It is broken into modules for that reason.
Openings, corners and lifting routes all constrain it.
Reassembly happens on site.
A unit that cannot be delivered cannot be installed.
What access does the unit need afterwards?
A person must reach every serviceable part.
Filters, drains, dampers and the fan all qualify.
Panel positions and door swings matter.
So does the free working space in front of it.
This belongs in the drawing, not the commissioning report.
Where are these units usually installed?
In a plant room, indoors, at the heart of the system.
They serve a building or a large zone.
Ductwork distributes from the unit outwards.
Weatherised versions exist for outdoor siting.
The indoor case is the more common one.