A Singapore customer has placed an order for a customised air handling unit (AHU), confirming the project specification and moving it into production. The order reflects steady demand from overseas clients for factory-built, application-specific air handling rather than off-the-shelf boxes that never quite fit the duty.
What a Customised Air Handling Unit Includes
An AHU conditions and moves air for a building: it draws return and fresh air, filters it, heats or cools it through coils, and delivers it through the duct network. A customised unit is built around the project's airflow, pressure, and hygiene needs rather than a fixed catalogue size. Common sections are mixed-air, filtration, cooling and heating coils, fan, and supply, arranged in the order the space requires, so the air is treated in the right sequence.
For humid or coastal sites such as Singapore, corrosion resistance is a primary design input. The factory's marine anti-corrosion version of the combined air handling unit uses coated coils, stainless fixings, and a treated casing so the unit keeps performing in high-salt, high-humidity air. This is the same family of construction used on vessels and shore-side marine buildings, where a rusted casing is not a cosmetic issue but a leak and a failure.
Filtration and heat recovery are often the parts that decide indoor air quality and running cost. A hospital or lab AHU will carry higher-grade filters, while a commercial tower may add a heat-recovery wheel to cut the energy needed to condition fresh air. The Singapore order was specified to match the local duty, not a generic template, which is why a customised unit was the right call rather than a stock size.
The fan inside the AHU is selected to the unit's own resistance, including the coils and filters, so the package performs as a whole. Treating the fan and the casing separately is how suppliers end up with a unit that cannot reach its airflow once the filters load.
Typical AHU Configuration
The table lists the sections and parameters normally reviewed when a unit is customised, so the buyer can see what is being decided and why.
| Item | Specification | Note |
|---|---|---|
| Airflow | 2,000 to 80,000 m3/h | per unit, project sized |
| Filtration | G4 to H13 | grade set by space use |
| Coils | chilled / hot water | or direct expansion |
| Heat recovery | wheel or plate, 60% to 75% | optional, cuts fresh-air load |
| Casing | marine anti-corrosion option | coastal and marine sites |
Because the unit is built to order, the fan selection, coil rows, and filter stage are matched to the duty, which avoids the oversizing that wastes energy and the undersizing that leaves a space uncomfortable. The marine option also protects the investment through a long tropical service life.
Section order is not trivial: putting the fan before the coils versus after changes the noise and the coil life, so the layout is part of the engineering, not just the footprint. A customised unit lets that order be chosen rather than inherited.
Checklist Before an AHU Order
Buyers specifying a customised AHU should confirm the points below with the supplier, because the answers decide whether the unit performs or merely fits.
- State the airflow and pressure: these set the casing size and fan, so give real figures, not estimates.
- Define filtration grade: match the filter to the space, from G4 comfort to H13 cleanroom.
- Choose corrosion protection: for coastal or marine use, specify the anti-corrosion build.
- Decide on heat recovery: a wheel or plate exchanger often pays back in tropical climates.
- Confirm dimensions: check the unit fits the plant room and the access route for delivery.
Why Direct Factory Supply Helps
Ordering a customised AHU direct from the manufacturer shortens the chain between the design intent and the built unit. The same engineering team that sizes the fan also builds the casing, which reduces the mismatch that appears when components are sourced separately and bolted together on site.
For overseas projects, clear specification at the order stage prevents costly rework and shipping delays once the unit is en route, because a unit built wrong is expensive to fix on a distant dock. Direct supply also keeps the performance test in the same hands as the build.
The Singapore order shows the pattern the factory supports: a defined duty, a corrosion-matched build, and a single accountable supplier from enquiry to commissioning.
Before a customised AHU is shipped, a factory acceptance test protects both sides, and the buyer should ask to witness or receive the report. The test confirms the fan reaches the specified airflow against the coil and filter resistance, that the filtration stage is fitted as ordered, and that the controls respond, all under conditions close to the site duty. For a coastal or marine build this is also the moment to confirm the anti-corrosion treatment is on every exposed surface, not just the casing face, because a missed bracket is where corrosion starts. A unit that passes acceptance arrives as a known quantity, while one that ships untested arrives as a question, and on an overseas project the difference is measured in freight and delay if it must come back.
Keruite engineers respond to selection enquiries within 24 hours, backed by the factory's own performance testing laboratory and more than 30 years of fan manufacturing experience.
