Pro Breeze Osmo® Moisture Absorber Refill Tablets Review (2026)

The Pro Breeze Osmo refills consist of two 700g extra-large tablets that fit into standard non-electric moisture absorber units. These work via a chemical reaction where the salt tablets absorb airborne moisture and dissolve into a collected liquid. Being fragrance-free and non-electric, they offer a silent and invisible way to manage relative humidity in spaces where a mains-powered unit would be impractical or too expensive to run.

In typical UK winter conditions, these tablets perform well in confined areas like wardrobes or under-sink cabinets. They are significantly slower than electric units, often taking several days to show visible water collection. However, their lifespan of up to 100 days per tablet (depending on local humidity) makes them a practical 'set and forget' solution for seasonal condensation.

Because these tablets require no electricity, the energy saving is 100% compared to running a small Peltier-effect dehumidifier, which might cost £5–£10 per month in electricity. However, for serious damp issues, relying solely on passive absorbers can be a false economy if it fails to prevent structural mould damage that requires expensive repair. We recommend them as a supplement to, rather than a replacement for, proper ventilation and heating.

Extremely straightforward: simply remove the tablet from its plastic wrapper and place it into the designated tray of your moisture absorber unit. Ensure the unit is on a flat surface to prevent spillages of the collected brine.

The primary running cost is the replacement of the tablets. At roughly £5 per refill, the annual cost per unit sits between £15 and £20, which is often cheaper than the electricity required to run a small plug-in unit for the same duration.