Kaldera Cold Therapy Plunge 320 vs Lumi Therapy Pod MAX Ultra
Two cold plunge tubs side by side: Kaldera Cold Therapy Plunge 320 at £109 and Lumi Therapy Pod MAX Ultra at £89. Prices and specifications checked against each maker's page, last on .
Choose the Kaldera Cold Therapy Plunge 320 if
Nothing in the published data puts it ahead.
Choose the Lumi Therapy Pod MAX Ultra if
- it costs £20 less (22% cheaper)
- it holds more water (420 L against 320 L), useful if you are tall or want room to move
| Kaldera Cold Therapy Plunge 320 | Lumi Therapy Pod MAX Ultra | |
|---|---|---|
| UK price | £109 | £89 |
| Type | Inflatable or portable tub | Inflatable or portable tub |
| Capacity | 320 L | 420 L |
| Includes chiller | No | No |
| Material | 3-layer PVC shell, powder-coated steel frame | Inflatable, 5-layer insulated PVC with rip-stop polyester outer |
| Insulation | Not stated | 10 mm |
| Dimensions | Not stated | 900 dia x 750 h mm |
| Weight (empty) | Not stated | Not stated |
| Voltage | Not stated | Not stated |
| Filtration | Not stated | Not stated |
| Outdoor use | Not stated | Yes |
| App control | Not stated | No |
| Warranty | Not stated | 6 months |
| Tested by us | No | No |
| Where to buy | Check price at Kaldera Cold Therapy | Check price at Lumi Therapy |
Buying facts
| Kaldera Cold Therapy Plunge 320 | Lumi Therapy Pod MAX Ultra | |
|---|---|---|
| Price per litre of capacity | £0.34 | £0.21 |
| Ice to cool from 15C to 8C, per plunge | 31 kg | 41 kg |
| Brand rating on Trustpilot | No profile found | 3.8 from 4,978 reviews |
| Newest Trustpilot reviews we read | n/a | 12 of 15 at 1-2 stars |
| Amazon UK rating | Not on Amazon UK | 4.1 from 50 ratings |
| Where the seller is based | Not stated | Torquay, Devon |
Trustpilot scores cover the whole brand and its service, not this model alone; we read the newest reviews on each profile at every data run. How we check the data.
Price history
| From | Kaldera Cold Therapy Plunge 320 | Lumi Therapy Pod MAX Ultra |
|---|---|---|
| Not tracked yet | £89 |
No tracked price has changed since 8 Sept 2026; last checked 5 Oct 2026.
What the numbers say
On price, the Lumi Therapy Pod MAX Ultra is £20 cheaper than the Kaldera Cold Therapy Plunge 320 (£89 against £109 in the UK at the time of writing).
Capacity: Kaldera Cold Therapy Plunge 320 320 L, Lumi Therapy Pod MAX Ultra 420 L (advantage Lumi Therapy Pod MAX Ultra).
We have not tested either unit ourselves, so this comparison is built from the makers' specifications, UK pricing and owner feedback; each product page says the same.
Frequently asked questions
Is the Kaldera Cold Therapy Plunge 320 or the Lumi Therapy Pod MAX Ultra cheaper?
The Lumi Therapy Pod MAX Ultra is cheaper at £89, £20 less than the Kaldera Cold Therapy Plunge 320 at £109, on the UK prices we last checked.
Which holds more water, the Kaldera Cold Therapy Plunge 320 or the Lumi Therapy Pod MAX Ultra?
The Lumi Therapy Pod MAX Ultra: about 420 litres against 320 litres.
Do the Kaldera Cold Therapy Plunge 320 and the Lumi Therapy Pod MAX Ultra come with a chiller?
No. Both are cooled with ice or a separate chiller. Our ice calculator and chiller sizing calculator show what each option needs.
Related comparisons
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- Kaldera Cold Therapy Plunge 80 vs Lumi Therapy Pod MAX Ultra
- Lumi Therapy Pod MAX Ultra vs The Pod Company Ice Pod
- Lumi Therapy Pod MAX Ultra vs The Cold Pod Standard
Read the full pages
- Kaldera Cold Therapy Plunge 320: price, specs and verdict
- Lumi Therapy Pod MAX Ultra: price, specs and verdict
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