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Head to head · updated 5 September 2026

Rainman Portable AC 140L vs Rainman Portable AC 75L

Portable AC 140L costs 1.9× less energy per litre (9.8 against 18.2 Wh/L). Portable AC 140L makes 1.9× the water per hour (127 against 68.5 L/hr). Portable AC 75L is about $927 cheaper on indicative pricing.

RainmanPortable AC 140L9.8 Wh/LRainmanPortable AC 75L18.2 Wh/L
SpecPortable AC 140LPortable AC 75L
BrandRainmanRainman
Output100–154 L/hr55–82 L/hr
Power draw1,250 W1,250 W
Energy per litre9.8 Wh/L18.2 Wh/L
Run time for 100 L0.8 h1.5 h
Energy for 100 L984 Wh1,825 Wh
Power sourceAC 240VAC 240V
ConfigurationPortablePortable
Membranes2 × 40in1 × 40in
Indicative price$5,329$4,402
Efficiency rank10 of 3027 of 30

Highlighted cells mark the better figure on that row alone. Lower is better for energy, run time and price; higher is better for output.

Buy the Portable AC 140L if…

Your boat runs on solar and every watt-hour is spoken for, because this is the cheaper litre to make; you want tanks full in the shortest possible run, or you have a genset that is going to run anyway.

Get a quote on the Portable AC 140L

Buy the Portable AC 75L if…

The purchase price matters more to you than the running cost.

Get a quote on the Portable AC 75L

Common questions

Which is more efficient, the Portable AC 140L or the Portable AC 75L?
The Portable AC 140L, at 9.8 watt-hours per litre against 18.2. Over 100 litres a day that is a difference of about 841 Wh.
Which makes more water, the Portable AC 140L or the Portable AC 75L?
The Portable AC 140L, at 127 L/hr against 68.5. That is 1.9 times the output per hour running.
Which is cheaper?
On indicative pricing the Portable AC 75L at $4,402, about $927 less than the other. Both figures exclude freight, duty and installation, and Australian dealer pricing normally reads higher.
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