{"id":24906,"date":"2026-06-12T16:01:44","date_gmt":"2026-06-12T13:01:44","guid":{"rendered":"https:\/\/filtrupasaule.lv\/5-reasons-why-clogged-air-filters-are-bad-for-your-health\/"},"modified":"2026-06-12T17:16:12","modified_gmt":"2026-06-12T14:16:12","slug":"5-reasons-why-clogged-air-filters-are-bad-for-your-health","status":"publish","type":"post","link":"https:\/\/filtrupasaule.lv\/en\/5-reasons-why-clogged-air-filters-are-bad-for-your-health\/","title":{"rendered":"5 Reasons Why Clogged Air Filters Are Bad for Your Health"},"content":{"rendered":"\n

In today’s homes, we increasingly talk about comfort, energy efficiency, and energy conservation<\/strong>. However, we rarely stop to think about how the air we breathe affects our daily well-being.<\/strong> Scientific studies show that indoor air can be up to five times more polluted than outdoor air<\/strong>, but in Lithuania\u2014especially during the heating season\u2014 the concentration of fine particulate matter in the air often exceeds World Health Organization (WHO) recommendations<\/strong>.<\/p>\n\n

Recuperation systems help reduce these negative effects\u2014 but only if the recuperation filters are working effectively. Clogged filters not only lose their protective function, but can also pose a health risk<\/strong>.<\/p>\n\n

Types of air filters: What do G4, M5, F7, and activated carbon filters capture?<\/h2>\n\n

When choosing filters, it is important to understand what they protect against and what types of particles they can trap<\/strong>. Indoor air quality is affected by particles of various sizes\u2014ranging from coarse dust to microscopic bacteria and smog compounds. Each class of filters serves a different purpose.<\/strong><\/p>\n\n

G4 filters<\/a><\/strong> are primary filters that trap coarse dust, hair, insects, and larger pollen particles.<\/strong> They effectively protect the heat recovery unit itself, but provide very limited protection against fine particles that are hazardous to health<\/strong>.<\/p>\n\n

M5 filters<\/a><\/strong> are one of the most commonly used standards in Lithuanian homes. They trap most pollen, dust mites, and mold spores<\/strong>, and effectively filter particles that are approximately 1\u20132.5 microns<\/strong> in size \u2014 it is precisely these particles that most commonly cause allergies and respiratory irritation<\/strong>.<\/p>\n\n

F7 filters<\/a><\/strong> are high-efficiency fine particle filters<\/strong> capable of capturing up to 90\u201395% of particles as small as 0.3 microns.<\/strong> For comparison, many bacteria,<\/strong> such as staphylococci and streptococci, as well as smog particles, range in size from 0.3 to 2 microns<\/strong>. That is why F7 filters are particularly recommended for people who live in cities, near busy roads, or suffer from allergies.<\/strong><\/p>\n\n

Activated carbon filters<\/strong> provide additional protection against odors and gases<\/strong>. They absorb cigarette smoke, cooking odors, combustion byproducts, and industrial gases.<\/strong> This is especially important for residents of apartment buildings, where cigarette smoke from neighbors or airborne viruses can enter through ventilation systems or open windows.<\/strong> Activated carbon also<\/strong> traps chemical compounds that contribute to smog formation.<\/strong><\/p>\n\n

Why are dirty filters dangerous? 5 scientifically proven reasons<\/h2>\n\n

1. The most dangerous fine particles end up indoors<\/h3>\n\n

The smallest particles\u2014 invisible to the naked eye\u2014are the most harmful.<\/strong> In Lithuania, 2023. In 2019, levels exceeded WHO recommendations in all major cities.<\/strong> These particles penetrate deep into the lungs and even enter the bloodstream, increasing the risk of cardiovascular and respiratory diseases<\/strong>. A dirty filter can no longer trap them effectively\u2014 the airflow weakens<\/strong>, and the contaminants simply bypass the filter material<\/strong>.<\/p>\n\n

2. During the heating season, smog and smoke particles enter homes<\/h3>\n\n

Lithuanian winters are characterized by higher levels of smog<\/strong>, caused by the burning of fuel, poor air circulation, and stagnant air. Smoke particles are often smaller than 1 micron<\/strong>, so only M5 or F7 class filters can effectively capture them.<\/strong> An old filter can lose up to half of its filtration efficiency<\/strong>, allowing smog to easily enter living spaces.<\/p>\n\n

3. Clogged filters become breeding grounds for bacteria and mold<\/h3>\n\n

Damp and dusty filters create ideal conditions for the growth of microorganisms.<\/strong> If filters are not changed for more than 3\u20136 months<\/strong>, the heat recovery system may begin to blow unpleasant odors, bacterial particles, or mold spores<\/strong> into the rooms .<\/strong> This is particularly dangerous for young children, the elderly, and people with weakened immune systems.<\/strong><\/p>\n\n

4. Higher risk of inhaling viruses and odors from neighbors in apartment buildings<\/h3>\n\n

Viruses themselves are extremely small, but they often travel by attaching themselves to other particles, which F7 filters can capture with up to 95% efficiency.<\/strong> This reduces the risk in situations where a neighbor is ventilating their home while sick or when smoke and odors are circulating in the air.<\/strong> Activated carbon ensures that odors and gases do not spread between apartments.<\/strong><\/p>\n\n

5. Increased risk of allergies and asthma flare-ups<\/h3>\n\n

Pollen and mold spores are among the most common allergens.<\/strong> Studies show that opening windows can allow up to 70% of outdoor pollen to enter indoor spaces.<\/strong> When filters become worn out and allow more particles to pass through, people with allergies feel the effects immediately\u2014 runny nose, coughing, sneezing, and difficulty breathing.<\/strong><\/p>\n\n

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A heat recovery system can be an effective tool for creating a healthier indoor climate\u2014but only if the filters are properly maintained<\/strong>. Contaminated filters not only fail to protect against air pollution, but can actually increase it<\/strong>. That is why experts recommend replacing heat recovery filters every 3 to 6 months<\/strong>, and activated carbon filters even more frequently<\/strong>.<\/p>\n\n

If you’re looking for reliable, certified heat recovery filters<\/a><\/strong>, Filtru pasaule offers a wide range of filters, home delivery, and personalized consultations tailored to your system model.<\/strong><\/p>\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

In today’s homes, we increasingly talk about comfort, energy efficiency, and energy conservation. However, we rarely stop to think about how the air we breathe affects our daily well-being. Scientific studies show that indoor air can be up to five times more polluted than outdoor air, but in Lithuania\u2014especially during the heating season\u2014 the concentration […]<\/p>\n","protected":false},"author":3774,"featured_media":24907,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2982],"tags":[],"class_list":["post-24906","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tips"],"_links":{"self":[{"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/posts\/24906","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/users\/3774"}],"replies":[{"embeddable":true,"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/comments?post=24906"}],"version-history":[{"count":3,"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/posts\/24906\/revisions"}],"predecessor-version":[{"id":24910,"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/posts\/24906\/revisions\/24910"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/media\/24907"}],"wp:attachment":[{"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/media?parent=24906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/categories?post=24906"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/filtrupasaule.lv\/en\/wp-json\/wp\/v2\/tags?post=24906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}