Ventilation, heating and cooling are inseparably connected. If you are trying to create a specific indoor climate and maintain it, you inevitably seek to isolate yourself from the external environment. When it is cold, windy or humid outside, every open window instantly destroys the indoor climate you have created through heating or air conditioning. The warmth accumulated during winter or the coolness preserved during summer simply escapes outdoors, forcing the system to consume more energy to restore comfort. This raises a fundamental question: is it possible to provide fresh air without compromising the climate inside the home?<\/p>\n
Traditional homes throughout the Mediterranean were built as buildings that were, quite literally, open to the atmosphere. Leaky windows, entrance doors, ventilation shafts, fireplaces, electrical penetrations, poorly executed junctions and thousands of small gaps connected the interior of the home directly to the outside world. Even in properties that are marketed today as modern and energy efficient, the total area of uncontrolled air leakage can be equivalent to an opening the size of a football. At first glance, this may seem beneficial because air is constantly being replaced. In reality, however, this is not ventilation. It is simply a chaotic connection between the home and the atmosphere.<\/p>\n
Uncontrolled air does not arrive where it is actually needed. It enters through random gaps, follows unpredictable paths and leaves through equally random openings. Under such conditions, it is impossible to guarantee a consistent supply of fresh air to bedrooms, living rooms and other spaces where people spend most of their time. Paradoxically, we can have a home that is open to the atmosphere from every direction and still sleep in a room filled with stale air.<\/strong><\/p>\n This problem becomes especially apparent at night. During the mild shoulder seasons in Spain, it is often possible to sleep with the windows open. However, during periods of intense heat, high humidity or winter cold, this simple solution stops working. In summer, even at night, the outdoor air can resemble a steam bath, and opening the windows wide fails to provide the cooling people expect. In winter, an open window quickly removes the warmth accumulated in the bedroom. As a result, people face a primitive choice: ventilation accompanied by heat, cold, noise and pollution, or closed windows and thermal comfort while breathing the same air all night long with almost no fresh air supply.<\/p>\n Air conditioning does not solve this problem either. It can cool the air. It can be programmed to switch on once or twice during the night to maintain the coolness stored in the building. It can make the bedroom temperature more pleasant. What it cannot do is provide fresh air. It simply recirculates the same indoor air again and again. In winter, a similar situation occurs. If you do not sleep with the window open, the air quality in a closed room gradually deteriorates. The result is an absurd situation: people purchase expensive homes, pay substantial energy bills for heating or cooling, yet still find themselves choosing between thermal comfort and proper breathing during the night.<\/p>\n Noise adds another layer to the problem. An open window does not only let in air. It also lets in the scooter passing at five in the morning, a barking dog, conversations from the street, the rubbish lorry, a motorbike, an unexpected noise or the lawn mower of an early rising gardener, all of which can destroy a good night\u2019s sleep in seconds, even in a relatively quiet area. In major cities, this problem becomes constant. That is why ventilation cannot be separated from acoustic comfort. If fresh air requires an open window, your bedroom is no longer protected from outdoor noise. If you close the window to preserve silence, you once again sacrifice proper ventilation. In a conventional home, these contradictions are almost impossible to solve simultaneously.<\/p>\n Furthermore, the expression \u201cfresh air from the window\u201d is often an illusion. Along with outdoor air come dust, pollen, insects, soot particles, vehicle emissions, bacteria and whatever else happens to be present in the surrounding atmosphere. During winter in Spain, it is possible to observe clouds of smoke hanging above certain residential developments after a cold night due to the operation of fireplaces and wood burning stoves. This is the same supposedly fresh air that enters bedrooms through open windows, gaps and basic ventilation systems. Natural pollution must also be considered. One example is the phenomenon known as calima, when dust from the Sahara fills the Mediterranean atmosphere with suspended particles.<\/p>\n And we have not even mentioned the money that literally escapes outdoors together with warmth in winter and coolness in summer. The real problem lies elsewhere. People pay for heating, cooling and maintaining their homes while continuing to live in an environment of poor quality. Noise, stuffy air, draughts, dust, pollen and indoor temperatures that depend on the weather outside are accepted as normal. In reality, they are not. They are signs of a building that is incapable of providing its occupants with a genuinely high level of comfort.<\/strong><\/p>\n This is precisely why discussions about energy efficient homes are often not really about energy at all. They are about a new level of quality of life. Imagine a home where the indoor climate remains stable regardless of heat, cold, wind or humidity outside. A home where bedrooms receive purified air that has passed through a high performance filtration system. A home where you breathe air free from mosquitoes, moths, dust, soot, asphalt particles, pollen and a significant proportion of biological contaminants. A home where fresh air is not delivered vaguely \u201cinto the building\u201d but specifically to bedrooms and living spaces where people need it most. A home where you can sleep with the windows closed, without hearing the scooter outside your window in the morning and without waking up until eleven o\u2019clock.<\/p>\n How is this achieved? Everything begins with airtightness. Without it, high quality ventilation is impossible. Many people still believe that a house should \u201cbreathe\u201d. This is one of the most widespread misconceptions in construction. Buildings should not breathe through gaps and cracks. People should. The fewer uncontrolled pathways air has to enter a building, the more accurately its quality, temperature and distribution can be controlled. For this reason, the foundation of a modern energy efficient home is an airtight building envelope, specialist windows and doors, carefully designed junctions and a mechanical ventilation system with heat recovery.<\/p>\n In Passive House construction, airtightness is not a declaration of intent. It is a measurable performance parameter that must be verified. This is the purpose of the Blower Door test. A pressure difference is created between the inside and outside of the building equivalent to the effect of approximately a 32 km\/h wind acting on the front door. The volume of air leaking uncontrollably through gaps and weak points in the building envelope is then measured. The Passive House standard permits a maximum of 0.6 air changes per hour. For comparison, even many modern buildings exceed 2 air changes per hour, homes built 15 or 20 years ago often achieve between 4 and 8, while older buildings may reach 20. The lower the figure, the higher the airtightness and the more effectively the ventilation system can perform.<\/p>\n In our La Rajoleria 1 project, the Blower Door test result was just 0.29 air changes per hour. This is more than twice as good as the maximum permitted value under the Passive House standard. For us, this figure represents far more than compliance with a certification requirement. It demonstrates that the home fully controls its relationship with the surrounding atmosphere. Outdoor air no longer enters through random gaps and uncontrolled leakage paths. Instead, it is filtered to remove dust, pollen, soot and other contaminants. It exchanges energy with the extracted air through the heat recovery unit without mixing with it. As a result, it enters the home pre warmed in winter and without destroying the accumulated coolness in summer. It is then supplied directly to living rooms and bedrooms. Air extraction takes place from kitchens, bathrooms, utility rooms and other areas where odours and excess moisture are generated. This creates a continuous and controlled airflow in which clean air reaches the spaces where it is needed most while stale air is constantly removed.<\/p>\n The result is not a chaotic exchange of air but a controlled circulation system. No draughts. No random leaks. No illusion of freshness through an open window. Instead, there is a constant, quiet, balanced and targeted supply of air to the living areas. In a home with a fireplace, traditional ventilation shafts, leaky windows and numerous uncontrolled openings, it is impossible to achieve this level of air movement. Air will always choose the path of least resistance rather than the path to people. This is why such homes often feel stuffy despite being in constant contact with the outdoor environment.<\/p>\n The economic benefits of such a system extend far beyond low energy bills. The real result cannot be measured in kilowatt hours or pounds. It is experienced every morning when people wake feeling genuinely rested. In a home where a comfortable temperature is maintained throughout the year, where there are no draughts, where outdoor noise remains outside and where clean filtered air is continuously supplied, sleep becomes deeper, recovery more complete and daily stress significantly lower. Ultimately, this is not a story about ventilation, airtightness or heat recovery. It is a story about quality of life. About creating an environment where people sleep better, fall ill less often, recover more quickly, maintain higher productivity and enjoy greater comfort every single day. That is the true value of a modern high performance energy efficient home.<\/strong><\/p>\n Vladimir Nazarchuk, 2026 \u00ab\u041d\u0430\u0441\u0442\u043e\u044f\u0449\u0430\u044f \u0446\u0435\u043d\u043d\u043e\u0441\u0442\u044c \u044d\u043d\u0435\u0440\u0433\u043e\u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0434\u043e\u043c\u0430 \u0438\u0437\u043c\u0435\u0440\u044f\u0435\u0442\u0441\u044f \u043d\u0435 \u0441\u044d\u043a\u043e\u043d\u043e\u043c\u043b\u0435\u043d\u043d\u044b\u043c\u0438 \u043a\u0438\u043b\u043e\u0432\u0430\u0442\u0442\u0430\u043c\u0438. \u041e\u043d\u0430 \u0438\u0437\u043c\u0435\u0440\u044f\u0435\u0442\u0441\u044f \u0447\u0438\u0441\u0442\u044b\u043c \u0432\u043e\u0437\u0434\u0443\u0445\u043e\u043c, \u043f\u043e\u043b\u043d\u043e\u0446\u0435\u043d\u043d\u044b\u043c \u0441\u043d\u043e\u043c, \u043d\u0438\u0437\u043a\u0438\u043c \u0443\u0440\u043e\u0432\u043d\u0435\u043c \u0441\u0442\u0440\u0435\u0441\u0441\u0430 \u0438 \u0432\u044b\u0441\u043e\u043a\u0438\u043c \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u043e\u043c \u0436\u0438\u0437\u043d\u0438 \u0435\u0433\u043e \u0436\u0438\u0442\u0435\u043b\u0435\u0439.\u00bb Novaspace Promo \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0432\u0435\u043d\u0442\u0438\u043b\u044f\u0446\u0438\u0438, \u043e\u0442\u043e\u043f\u043b\u0435\u043d\u0438\u044f \u0438 \u043e\u0445\u043b\u0430\u0436\u0434\u0435\u043d\u0438\u044f \u0434\u043e\u043c\u0430 \u043d\u0435\u0440\u0430\u0437\u0440\u044b\u0432\u043d\u043e \u0441\u0432\u044f\u0437\u0430\u043d\u044b \u043c\u0435\u0436\u0434\u0443 \u0441\u043e\u0431\u043e\u0439. \u0415\u0441\u043b\u0438 \u0432\u044b \u043f\u044b\u0442\u0430\u0435\u0442\u0435\u0441\u044c \u0441\u043e\u0437\u0434\u0430\u0442\u044c \u0432\u043d\u0443\u0442\u0440\u0438 \u0436\u0438\u043b\u044c\u044f \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0439 \u043a\u043b\u0438\u043c\u0430\u0442 \u0438 \u0441\u043e\u0445\u0440\u0430\u043d\u0438\u0442\u044c \u0435\u0433\u043e, \u0432\u044b \u043d\u0435\u0438\u0437\u0431\u0435\u0436\u043d\u043e \u0441\u0442\u0440\u0435\u043c\u0438\u0442\u0435\u0441\u044c \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u043e\u0442 \u0432\u043d\u0435\u0448\u043d\u0435\u0439 \u0441\u0440\u0435\u0434\u044b. \u041a\u043e\u0433\u0434\u0430 \u043d\u0430 […]<\/p>\n","protected":false},"author":3,"featured_media":4255,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4248","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/gruporeunion.es\/en\/wp-json\/wp\/v2\/posts\/4248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gruporeunion.es\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gruporeunion.es\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gruporeunion.es\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/gruporeunion.es\/en\/wp-json\/wp\/v2\/comments?post=4248"}],"version-history":[{"count":0,"href":"https:\/\/gruporeunion.es\/en\/wp-json\/wp\/v2\/posts\/4248\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gruporeunion.es\/en\/wp-json\/wp\/v2\/media\/4255"}],"wp:attachment":[{"href":"https:\/\/gruporeunion.es\/en\/wp-json\/wp\/v2\/media?parent=4248"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gruporeunion.es\/en\/wp-json\/wp\/v2\/categories?post=4248"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gruporeunion.es\/en\/wp-json\/wp\/v2\/tags?post=4248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nNOVASPACE PROMO<\/p>","protected":false},"excerpt":{"rendered":"