The article discusses the importance of using passive energy-saving technologies in energy-efficient homes in Russia. It explains the concept of passive houses and solar houses, emphasizing the use of solar energy for heating. The focus is on a common system called a "vegetarian," which involves heating the space between the house and nature. Different types of vegetarians and their benefits are described, along with practical recommendations for optimal performance. The study concludes that solar houses with a vegetarian offer clear advantages in terms of passive heating and architectural appeal.