Main or additional heating. For additional heating (in addition to the Central or individual), choose a power of 15 W / m. for rooms where the heating cable acts as the main source of heat, choose 18 W/m.
Two-core or single-core. Two-core – slightly more expensive, easier to install, heats up faster (than single-core). Single-core – cheaper, but harder to install. Requires preliminary calculations of the laying area due to the design of the cable.
We recommend buying a "thin warm floor SNT-15": fits under the tile without screed, fast heating, installation is easier than single-core, reliable due to the possibility of a small overheating.
Think where to start?
start with popular cable warm floors, or ask a specialist.