Passive house "is the culmination of building energy-saving concepts and various technological products. By fully utilizing renewable energy such as solar energy and geothermal energy, the primary energy consumption for heating does not exceed 15 kilowatts per square meter ▪ The house of the year. The concept of "passive house" was first proposed by Professor Bo Admsen and others from Lund University in Sweden in the early 1980s. Its idea is to build a house with a necessary comfort level that can reach an indoor temperature of over 20 ℃ in winter, relying solely on natural heat sources such as solar radiation, human body heat release, indoor lighting, and electrical heat dissipation, without the need for additional heating. The principle of passive houses is to use various energy-saving technologies to construct the best building envelope structure and indoor environment, greatly improving the building's insulation performance and airtightness, and minimizing the building's heating and cooling needs. On this basis, various passive building methods such as natural ventilation, natural lighting, solar radiation, and indoor non heating heat sources are used to achieve a comfortable indoor hot and humid environment and lighting environment.        

Requisitos para la base de madera de casas pasivas:

Technical measures - Thermal insulation system. The external wall of the thermal insulation system adopts a double-layer plywood structure, with a 20cm thick polystyrene insulation layer installed between the inner cement wall and the outer red brick. The windows are constructed with three layers of glass and equipped with anti radiation layers and movable mesh sunshades to ensure good air tightness and insulation effect. ——The roof of the passive room powered by solar energy equipment is equipped with photovoltaic power generation equipment, which can provide about 80% of the electricity required for building operation and use; Another function is shading, creating large shadows on the roof, reducing heat radiation under direct sunlight in summer, and allowing for more oblique sunlight in winter. ——Underground water pump for heating and cooling "passive houses" achieve winter heating and summer cooling through the combination of several technologies, among which an important part is the underground water pump, which is located 35 meters underground. The pipeline circulates the groundwater for heating and cooling; Cold beams can utilize high-temperature frozen water, namely groundwater, which can be applied here. ——The ventilation device of the central ventilation equipment building is also connected to the thermal cycle system, which has the functions of heat recovery, cooling, and dehumidification. Its heat recovery power and cooling are between 80% and 90%, minimizing energy loss to the greatest extent possible. Passive house design principle 1: The heating area should fully consider the winter sunlight, the main orientation of the building should be south facing, and more south facing windows should be installed to ensure natural lighting and ventilation effects. 2. Compact size, good A/V ratio (external surface to volume ratio), simple exterior facade, minimizing bumps and unnecessary shapes and components on the surface, and reducing the heat dissipation area on the external surface. 3. The outer protective structure is designed without a thermal bridge, and in the structural design, the terrace, equipment room, and other structural parts with high heat dissipation should be separated from the heating room by a partition structure design measure. 4. The peripheral protective structure, doors and windows, and various pipeline facilities should have excellent air tightness. Special instructions should be given for the method of air tightness, and key nodes should be marked with the method. 5. Ventilation and air exchange equipment should be equipped with efficient energy recovery devices, and indoor and outdoor air intake and exhaust days should be arranged reasonably. 6. Good sound insulation measures should be fully considered for indoor partitions, floors, doors and windows, drainage pipes, electrical switches, and various equipment. 7. Fully utilize renewable energy and avoid or reduce the use of disposable energy. 8. Energy saving building equipment. The advantage of passive housing is that it is an ultra-low energy building that can meet heating and cooling needs with minimal energy consumption, resulting in significant energy savings. 2. Cancel traditional heating and cooling systems, change the urban construction form and energy-saving design concept of buildings. Reduce carbon dioxide emissions and improve the severely polluted air environment. 4. A more comfortable and healthy living environment, high sound insulation, and indoor temperature and humidity suitable for human needs. Maintain fresh indoor air with a carbon dioxide content not exceeding 1000ppm (0.1%). 6. There is no dust indoors, clean air, and indoor PM2.5 is below the national limit under severe fog and thunder conditions outdoors.