28/11/2025
The new Rinnai JX series air conditioner has just hit the market at Harvey Norman, replacing the J series. Here's my detailed review:
• The foam packaging has been replaced with cardboard.
• They give you a cardboard template for the indoor unit.
• The indoor PCB is well encapsulated but not completely gecko proof.
• The indoor unit is straighter, meaning you can't see the interconnections if you run them out the side of the unit.
• The indoor unit doesn't feel as solid as the J series ones.
• You can use the remote control from the old Rinnai series on this one.
• The energy efficiency star rating is neck and neck against the J series.
• The electricals are a little different, and all JX series now use the standard 3 core + earth wiring (though was quietly brought out in the later stages of the J series).
• The 3.5Kw JX series gas pipe size is smaller than that of the J series.
• The JX factory gas charge raises a few questions, with little to no difference between the 2.5Kw (830g), 3.5Kw (830g), and 5Kw (850g) units.
• I've discovered a vulnerability with the outdoor PCB - which can easily be fixed using roof & gutter silicon sealant.
• Based on a little research on the remote controls, I suspect it's a rebadged AUX branded air conditioner (or vice versa).
I'd say yay, if you can find an installer willing to silicon the exposed inverter board IC.
Hisense J series is my other favourite, being one of the cheapest to buy. Those are fully gecko proof, but they use capillary refrigerant metering (except for the 7Kw and 8Kw units) meaning a fraction less energy efficiency. Their indoor units are fairly light in comparison to the Rinnai J series.
I think expensive doesn't mean best. They're all R32, so what's the point?
Mitsubishi? I'm not a fan of those. And there's a few different Mitsubishi types. Seen a couple of MHI fail before their time.
Fujitsu? I don't like them at all. Had a few of their schrader valves fail.