Relatively good performance in a small space but sturdy construction. Unfortunately, after one year it burned out with minimal use

The product is downright unacceptable. I used it for 60 minutes with a thermometer in a 4-square meter bathroom and the temperature only increased by half a degree. From 19°C to 19.5°C.

I have it for 1 day. I gave it 4 stars mainly for the build quality and not for the performance. I measured it with a device and it consumes slightly more than 500W. It is a high-quality device, it doesn't make any noise, and it doesn't flicker. I tested it a) in a large, high-ceiling bathroom of about 12 square meters and I couldn't notice any difference. I also tested it in a small, low-ceiling WC-shower of 3 square meters and it raised the temperature from 15oC to 17oC in about 30 minutes. It's not meant to heat up the WC for taking a shower, but if you have a small space of 2-3 square meters without heating, it can help break the cold. I will test it more and come back with further feedback.