Technology, design and craftsmanship

These are the hallmarks of every KHIS BY FRANTS SEER bathtub. Each plank of white ash wood (also known by its latin name: Fraxinus Americana) is thermally processed at 215°C for water-resistance and durability. This process also naturally darkens the wood, which is then hand-cut and oiled or waxed. The process is eco-friendly, and no toxic or harsh chemicals are used at any point. Each piece of wood is paired with a custom-designed rubber seal to prevent water loss when the wood naturally expands or contracts. Finally, all the parts are fitted together by hand using two strong, hidden cables. This assembly imitates yacht deck technology, and the invisibility of the cables ensures the elegant exterior of the bath. Each KHIS bath is a feat of engineering, and the designs are protected by an OHIM registration (similar to a trademark). When combined with any number of customisations, the final result is always a beautiful, unique bath of the highest quality craftsmanship.

KHIS bath

Assembled individually

KHIS bathtub is assembled by hand, every project individually, from hand-cut and hand-nished ashen parts. Every detail is unique in its measures, making each KHIS bathtub engineering achievement.


Color of KHIS bathtub is dark brown, almost black — due to the thermal processing of the wood at 215°C. Apart of elegant appeal, it gives the wood extraordinary water-resistance and durability. As with all products designed for indulgence, postprocessing is vital part of the process — KHIS bathtubs have eco-friendly post-processing, either by natural linen seed oil or hot waxing. KHIS is available in 3 different models, with 3 different finishing lines. Also bottom of the bathtub of your choice — wooden or made of stone — is available.

KHIS bath
KHIS bath

Unique technology

Combination of materials, design and technology can make simply good things great. KHIS bathtubs use rubber seals to connect hand-cut wooden parts, made of Nordic ash — the combination that's made to last, providing durability and aesthetic appeal.

Thermally modified wood — what is it? Find out from our cooperation partner's website.