Chiller Dimensions and Clearance: Planning the Space
What dimensions to check before a chiller arrives, how much clearance it needs, and the space mistakes that cause noise, overheating and service pain.
Plan for the chiller's footprint plus clearance at the fan, the coil and the service panel, plus room to reach hoses, filter and drain. A unit squeezed into a cupboard loses capacity and becomes unserviceable, even when the dimensions fit on paper.
The dimension question sounds trivial: measure the space, check the spec sheet, buy the unit that fits. In practice, most cramped chiller installations fail on clearance and access rather than on the footprint.
The four dimensions that matter
| Dimensions to confirm before ordering | ||
|---|---|---|
| Dimension | Where to measure | Why it matters |
| Footprint | Length × width of the cabinet | Whether it fits the floor space |
| Height | Cabinet top to floor | Under-bench and shelf installs |
| Service side | Panel clearance | Filter, valves, electrical access |
| Fan and coil side | Airflow clearance | Capacity and overheating |
Add the hose route and the door swing to the list; both are easy to forget and hard to fix.
Clearance is a performance specification
Manufacturers specify clearance because the chiller has to breathe. The number is usually given at the fan outlet and the coil face.
- Measure from the fan grille, not the cabinet corner.
- Do not aim the discharge at a wall that reflects hot air back.
- Leave space above the unit; heat rises.
- Keep the coil face clear of stored items.
A unit with 100 mm where the manual asks for 300 mm will run hotter and derate sooner. In a small room it may trip on high pressure during a hot day.
Service access is not optional
You will need to reach four things: the filter, the isolation valves, the electrical connections and the drain. If any of them is behind the unit in a cupboard, every routine task becomes a project.
- Leave the service panel side unobstructed.
- Do not stack storage in front of the chiller.
- Allow room to remove a hose without kinking it.
- Make sure the drain and drip tray are reachable.
Planning the room, not just the unit
| Room checks | |
|---|---|
| Check | Why |
| Floor load | A full tub plus chiller is heavy |
| Drain route | Emptying and condensate need somewhere to go |
| Electrical outlet | Protected circuit within cable reach |
| Ventilation | Heat rejection needs air movement |
| Noise path | Fan and compressor sound travels |
| Door width | Delivery may not fit a narrow route |
Under-bench and cupboard installs
These are the most common space-saving choices and the most common source of problems.
- A cupboard needs real ventilation: louvres or a vent, not a gap under the door.
- An under-bench void traps heat; measure the air temperature after an hour of running.
- Hoses must not be crushed by the unit or the bench.
- The unit must be removable without dismantling the bench.
If you cannot meet those, put the chiller somewhere else and run longer insulated hoses instead.
Delivery and access
The dimension people forget is the route to the room. A chiller that fits the space may not fit through the door, around the stair turn or into the lift.
- Measure every opening on the route, including the narrowest point.
- Check the unit's packaging dimensions, not just the cabinet.
- Ask whether the unit can be carried upright or must be palletised.
- Confirm who is responsible for moving it, and whether they will lift it over a step.
When the only space is bad
Sometimes there is genuinely nowhere good to put the chiller. In that case, the options are:
- Move the unit outdoors and run insulated hoses, accepting some heat gain.
- Improve the space: add a vent, remove a cupboard door, fit a louvre panel.
- Choose a water-cooled unit if a drain or a loop exists.
- Downsize the tub so a smaller chiller can live somewhere sensible.
What does not work is installing an air-cooled chiller in a sealed cupboard and hoping. The unit will run hotter, derate and eventually trip.
Building a plinth or platform
If the floor is uneven or cold, a simple plinth solves both.
- Use 18 mm plywood on battens, sealed against water.
- Leave a fall towards the front edge where the drip tray sits.
- Allow a gap underneath for air circulation.
- Fix the plinth securely so a full tub cannot shift it.
Noise and vibration
Space planning is also noise planning.
- Keep the unit off shared walls where possible.
- Use a rubber mat or feet to decouple vibration.
- Do not mount it on a hollow floor above a living space.
- Point the fan away from seating, desks and beds.
- Leave a gap so the unit does not resonate against a wall.
A simple space checklist
- Measure the footprint and height, then add the manual's clearance.
- Confirm the service side is reachable.
- Confirm the hose route is short and not kinked.
- Confirm the electrical outlet is within reach and protected.
- Confirm the drain and drip tray are accessible.
- Confirm the delivery route fits the unit and the tub.
- Run the unit for an hour and check the room temperature.
Frequently asked questions
How much space does a chiller need around it?
Follow the manual's clearance at the fan and coil, and keep the service panel reachable. Typical guidance is a few hundred millimetres at the airflow sides plus working space at the service side.
Can a chiller be installed in a cupboard?
Only with real ventilation. A sealed cupboard recirculates hot air, and the chiller loses capacity or trips on protection.
Can I put a chiller under a bench?
Yes, if the void is ventilated, the hoses are not crushed, and you can still reach the filter and valves. Measure the temperature in the void after an hour of running.
Does the chiller need to be level?
Yes, both for vibration and for condensate drainage. A slight fall towards the drain is often specified.
How close can a chiller be to a wall?
The manual's clearance applies to the wall behind the coil and to the fan discharge. Do not reduce it to gain a few centimetres of floor space.