MAC500 Series — the cold-room workhorse
● People-safe · runs 24/7 · no ozoneMount it high in the provision cold room and switch it on. The MAC500 runs continuously, stripping out the ethylene gas that ripens produce and cutting airborne bacteria, viruses and mould by up to 99.9% within 3 hours — keeping fruit and vegetables fresh roughly a week longer, with no chemicals and no filters. It's the JIMCO unit with the most sea time behind it — and it comes in two mountings: the wall- or shelf-mounted MAC500s, and the flush-ceiling MAC500c for new-build and refit.
Fresh provisions, the whole voyage
In a sealed cold room, ethylene from ripening produce builds up and ages the whole store at once. The MAC500 breaks that cycle with contained UV-C — a process called photolytic oxidation: UV-C at 200–300 nm photolyses organic molecules directly, while a trace of UV-C-generated ozone oxidises odour, bacteria, mould and ethylene. It removes ethylene at up to 1.6 mL/h in a 20 m³ room — and because it produces no NOx and no free ozone, it is safe to run 24/7 with the crew working around it.
- Degrades ethylene — the gas that ripens and rots fruit & vegetables
- Cuts airborne bacteria, viruses, mould & fungi — up to 99.9% in 3 hours
- Removes odour from the room, fabrics and surfaces — no masking
- No ozone, no NOx — safe in occupied cold rooms, stores and cabins
- Plug-and-play: mount high, switch on; only the 8,000 h UV lamp is consumable
One UV-C engine, two ways to fit it
The disinfection performance is identical. The only decision is how the unit goes into the space — and that is usually decided by whether the deckhead is already closed.
MAC500s
A standalone unit you mount high on a bulkhead or stand on a shelf, plugged into a nearby socket. Nothing to build in — it can be fitted to a vessel in service, in an afternoon, and moved later. This is the unit with the sea time behind it.
- Fit it when the ship is in service and the space is finished
- 310 × 90 × 90 mm · 1.98 kg
- White, black, grey or stainless-steel finish
MAC500c
The same engine in a low-profile housing that sits flush in the deckhead and disappears. Specify it while the ceiling is open — in new-build accommodation, galleys, messes and stores where a visible box on the bulkhead is not wanted.
- Fit it when the deckhead is open — new-build or refit
- 578 × 204 × 86 mm · 3.2 kg
- Flush ceiling mount — integrated installation
MAC500 Series — full spec sheet
Shared UV-C platform; the two variants differ only in housing, size and how they mount.
| MAC500s — wall / shelf | MAC500c — flush ceiling | |
|---|---|---|
| Technology | UV-C air & surface disinfection (no ozone, no NOx) | |
| UV lamp | 1 × 8 W | |
| Power consumption | 25 W | |
| Voltage | 230 V or 115 V | |
| Coverage | up to 60 m³ per unit | |
| Dimensions | 310 × 90 × 90 mm | 578 × 204 × 86 mm |
| Weight | 1.98 kg | 3.2 kg |
| Mounting | high on wall or shelf — plug-and-play | flush ceiling — integrated / new-build |
| Finish | white, black, grey or stainless steel | low-profile ceiling housing |
| Lamp life / maintenance | 8,000 operating hours | lamp change ~once a year (running-hours dependent) |
| Consumables | UV lamp only — no filters | |
| Documented effect | Danish Technological Institute (Reports 153323 ethylene · 933322 MS2 virus); bacteria/fungi by Analytical Laboratories, Singapore; UL-certified / CARB-listed MAC500s version available | |
| Origin | Made in Denmark by JIMCO A/S | |
Manufacturer specifications: MAC500s product page · MAC500c product page · MAC500c brochure (PDF) — consumable: replacement UV-C lamp (1 × 8 W, 8,000 h)
Where the MAC500 goes on a ship
One unit covers up to 60 m³ — size by room and fit a unit per space that matters.
Provision cold rooms
The flagship use — longer fruit & vegetable shelf life and far less binned food on long passages. MAC500s.
Dry & chill stores
Keeps bread, dairy and dry goods fresher and mould-free, with a consistently clean-smelling store. Either variant.
Cabins, mess & hospital
Cleaner air where the crew lives and eats — reducing airborne bacteria and viruses and limiting disease spread. Either variant.
New-build accommodation
Galleys, messes and cabins where the deckhead is still open and an integrated, flush installation is wanted. MAC500c.
The MAC500 Series up close
The MAC500 UV-C engine on the job
Two films from JIMCO covering the two jobs the same unit does: keeping the provision store's produce alive, and keeping the air clean where the crew lives.
MAC500 Series — FAQ
What is the difference between the MAC500s and the MAC500c?
Is it safe to run with the crew present?
How much longer will provisions last?
What if my cold room is bigger than 60 m³?
How fast does it cut airborne viruses?
Is it certified?
What does it cost to run and maintain?
Can I mix the two variants across one vessel?
Spec the MAC500 Series for your cold rooms
Send us your room volumes in m³ and whether each space is finished or open, and we'll come back with the unit count and the right variant per space — through ShipServ or direct.