Humidifiers don’t generally elicit sighs of admiration from design junkies, but the products imported by Swizz Style aren’t your usual household fare. Made by Stadler Form of Switzerland, these sculptural air purifiers, humidifiers, and heaters are as beautiful as they are functional: All products are tested to rigorous standards in European labs for the highest attention to efficacy and efficiency. The Otto fan is a particular standout, with its whisper-quiet operation and body made of fine-grain African sapele.