Nanofiltration IMT-RS8 NANO

The IMT-RS8 NANO is an under-sink water purifier with a 0.001 μm nanofiltration membrane. It removes viruses, bacteria, chlorine, pesticides, heavy metals, iron, manganese, nitrates, nitrites and microplastics. Unlike reverse osmosis, it keeps beneficial minerals (calcium, magnesium). It is a more affordable alternative to the IMT-NC9 nanofiltration unit, with the same PPC cartridge and the same NF membrane.

Both units have the same PPC cartridge and the same 0.001 μm NF nanofiltration membrane, automatic membrane flushing and 5-second bayonet filter changes, and both support Wi-Fi and the E-Water app as well as the SMART faucet. The IMT-RS8 NANO has no C carbon cartridge, uses LED indicators instead of a display and has a flow rate of 1.57 l/min. The IMT-NC9 additionally has the C cartridge, a colour touch display, a flow rate of 2.23 l/min and F. A. Porsche design.

Reverse osmosis removes almost everything from water, including beneficial minerals. IMT-RS8 NANO nanofiltration removes contaminants (pesticides, heavy metals, bacteria, viruses, nitrates) but keeps calcium, magnesium and potassium. The result is naturally mineralised, partially softened water.

Yes, very effectively. The IMT-RS8 NANO uses the same nanofiltration membrane as the IMT-NC9. Most pesticides have a molecular weight of roughly 200–400 g/mol, i.e. at or above the cut-off of a nanofiltration membrane. Their metabolites, which predominate in wells (e.g. the ESA and OXA metabolites of metazachlor or metolachlor), are also negatively charged and repelled by the membrane. Uncharged pesticides such as atrazine are additionally captured by the activated carbon in the PPC pre-filter. The weak spot is small uncharged metabolites, typically desphenyl-chloridazon. If a water test shows it at a higher concentration, we will recommend reverse osmosis. The EU drinking-water limit is 0.1 µg/l for each individual pesticide and 0.5 µg/l for their total.

Yes, most of them. The 0.001 μm membrane corresponds to a cut-off of roughly 200–300 g/mol. The most closely monitored PFAS are larger: PFOS is about 500 g/mol, PFOA about 414 g/mol. The membrane surface is also negatively charged and repels negatively charged PFAS molecules. For these substances, the scientific literature typically reports nanofiltration rejection of over 90 %, often around 99 %. Long-chain PFAS are further adsorbed by the activated carbon in the PPC pre-filter. Short-chain PFAS with small molecules (e.g. PFBA, TFA) are captured less well by nanofiltration. For those, reverse osmosis is more reliable.

We do not yet have a specific independent PFAS test of the IMT-RS8 NANO. PFAS are a group of more than ten thousand substances with different properties, so a single "PFAS efficiency" figure would be misleading. The efficiency is based on the physical principle of the membrane, i.e. its cut-off and electrical charge, and on published results for nanofiltration membranes.

Since 12 January 2026, EU drinking water has been subject to a limit of 0.1 µg/l for the sum of 20 monitored PFAS. On a public water supply, ask the operator for test results. For a private well, we recommend testing in an accredited laboratory, including pesticide metabolites. With low or undetectable levels, the IMT-RS8 NANO is an excellent choice; where higher levels are confirmed, we will recommend reverse osmosis. Send us your results and we will advise you free of charge.

A faucet is not included. To dispense filtered water you need a one-way or three-way faucet purchased separately. Optionally, you can buy the matte-black SMART faucet with TDS measurement, which shows the quality of the filtered water. It dispenses filtered water only and is not three-way.

The PPC cartridge is changed every 6–12 months. The NF nanofiltration membrane lasts 24–36 months. Both cartridges are the same as in the IMT-NC9. The unit monitors filter status automatically and alerts you via an LED indicator and in the E-Water app when a change is due.

A filter change takes 5 seconds thanks to the bayonet lock, and you need no tools. Simply shut off the water supply to the unit, open the filtered-water tap to release the pressure, swap the cartridge and turn the supply back on.

Yes. The IMT-RS8 NANO removes the bacteria, viruses, heavy metals, iron, manganese and nitrates typical of well water while keeping minerals. H2O nanotec offers a free consultation based on your water test.

Yes. The IMT-RS8 NANO removes microbiological contaminants and most chemical pollutants while keeping minerals. The result is clean, naturally mineralised water. It is suitable for everyday drinking, cooking and preparing baby food.