{"id":6111,"date":"2026-02-19T13:58:39","date_gmt":"2026-02-19T13:58:39","guid":{"rendered":"https:\/\/ingenic.es\/?p=6111"},"modified":"2026-08-04T17:35:14","modified_gmt":"2026-08-04T17:35:14","slug":"hvac-para-salas-limpias","status":"publish","type":"post","link":"https:\/\/ingenic.es\/en\/hvac-para-salas-limpias\/","title":{"rendered":"HVAC for cleanrooms: air and temperature control"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The <strong>HVAC system<\/strong> (<em>Heating, Ventilation and Air Conditioning<\/em>) is not just the heart of a cleanroom; <strong>it&#8217;s the guarantee of its certification<\/strong>. Incorrect design can invalidate the entire investment. Its function is to maintain a controlled, stable, contaminant-free environment, ensuring that the air meets the cleanliness, temperature, humidity and pressure parameters required by the <strong>ISO 14644<\/strong> standard and <strong>GMP<\/strong>. Today we&#8217;ll look at how an <strong>HVAC system for cleanrooms<\/strong> works, its main components, and the aspects essential to achieving effective, certified environmental control.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What is an HVAC system for cleanrooms<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">An <a href=\"https:\/\/ingenic.es\/en\/hvac\/\" data-type=\"page\" data-id=\"5763\">HVAC<\/a> is a complex network of equipment that filters, conditions and distributes air, guaranteeing a particle-free environment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its goal is to meet the cleanliness levels established for each <strong>ISO<\/strong> class (from <strong>ISO 5<\/strong> to <strong>ISO 9<\/strong>) and maintain constant environmental conditions, even in critical processes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike a conventional air conditioning system, <strong>HVAC for cleanrooms<\/strong> is designed to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Filter air<\/strong> using <strong>HEPA<\/strong> or <strong>ULPA filters<\/strong>.<\/li>\n\n\n\n<li>Control <strong>positive or negative pressure<\/strong> between zones.<\/li>\n\n\n\n<li>Regulate <strong>temperature and humidity<\/strong> within very narrow margins.<\/li>\n\n\n\n<li>Maintain <strong>laminar<\/strong> or <strong>controlled turbulent airflow<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Critical air control: HVAC functions for cleanrooms<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Air filtration<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Filters are the most important element of the HVAC system. Air passes through different filtration stages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pre-filters, which remove large particles.<\/li>\n\n\n\n<li><strong>HEPA or ULPA filters<\/strong>, which remove microscopic particles down to 0.12 \u00b5m.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This ensures that the air pushed into the room meets the corresponding ISO classification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Temperature and humidity control<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>HVAC<\/strong> system regulates temperature (<strong>typically between 18\u00b0C and 24\u00b0C<\/strong>) and relative humidity (<strong>between 45% and 60%<\/strong>) to prevent condensation or electrostatic discharge.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These parameters are crucial for maintaining product stability and staff wellbeing, as well as preventing thermal changes from affecting internal pressure or airflow.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Differential pressure<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cleanrooms<\/strong> are designed with a differential pressure system to prevent the entry of contaminants.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Positive pressure:<\/strong> air flows outward (used in sterile or production rooms).<\/li>\n\n\n\n<li><strong>Negative pressure:<\/strong> air enters from outside (for biological containment rooms or handling of hazardous agents).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>HVAC<\/strong> is responsible for keeping these pressures stable through automatic valves and sensors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. Air changes and flow rate<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The amount of air circulating through the room depends on the <strong>ISO<\/strong> level. For example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ISO 5:<\/strong> more than <strong>240<\/strong> air changes per hour.<\/li>\n\n\n\n<li><strong>ISO 7:<\/strong> between <strong>60 and 90<\/strong> changes per hour.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>HVAC<\/strong> system guarantees this constant flow rate to remove particles and maintain environmental purity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. Airflow distribution<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Filtered air can be distributed in two main ways:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Laminar flow:<\/strong> unidirectional, uniform and turbulence-free. Ideal for critical zones.<\/li>\n\n\n\n<li><strong>Turbulent flow:<\/strong> multidirectional, suitable for less-demanding areas.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The type of flow is defined in the initial design and determines the configuration of diffusers and return grilles.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Main components of the HVAC system<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">A complete <strong>HVAC<\/strong> system for cleanrooms includes the following elements:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Air Handling Unit (AHU): the heart of the system, where air is filtered and conditioned.<\/li>\n\n\n\n<li>Supply and return ducts: distribute clean air and collect used air.<\/li>\n\n\n\n<li>HEPA\/ULPA filters: located at supply terminals or modular ceilings.<\/li>\n\n\n\n<li>Fans and compressors: ensure constant airflow.<\/li>\n\n\n\n<li>Heating and cooling systems: regulate temperature.<\/li>\n\n\n\n<li>Humidifiers\/dehumidifiers: adjust relative humidity.<\/li>\n\n\n\n<li>Pressure, temperature and particle sensors: monitor the environment in real time.<\/li>\n\n\n\n<li>Automatic control system (BMS or SCADA): manages all parameters and generates records for audits.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Each component is designed to meet regulatory requirements and guarantee continuous, safe operation.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Regulations governing HVAC systems<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The design and maintenance of <strong>HVAC systems for cleanrooms<\/strong> is regulated by various international standards:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ISO 14644-4:<\/strong> design, construction and start-up requirements for cleanrooms.<\/li>\n\n\n\n<li><strong>ISO 14644-3:<\/strong> test methods and performance validation.<\/li>\n\n\n\n<li><strong>GMP<\/strong> (<em>Good Manufacturing Practices<\/em>): defines environmental conditions in pharmaceutical production areas.<\/li>\n\n\n\n<li><strong>FDA 21 CFR Part 210-211:<\/strong> requirements for pharmaceutical facilities in the US.<\/li>\n\n\n\n<li><strong>UNE-EN 1886:<\/strong> performance and energy efficiency standards for ventilation units.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Complying with these standards is essential to guarantee the installation&#8217;s final certification and validation.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Energy efficiency and sustainability<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>HVAC<\/strong> system is the main energy consumer in a cleanroom, accounting for up to <strong>70% of total consumption<\/strong>. That&#8217;s why efficient design is a strategic priority.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For this reason, the design should include:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Variable speed motors (VFD).<\/li>\n\n\n\n<li>Heat recovery units.<\/li>\n\n\n\n<li>Airflow optimization based on occupancy.<\/li>\n\n\n\n<li>Smart control systems (BMS).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These measures reduce costs and improve operational sustainability, without compromising air quality.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">HVAC system maintenance<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Regular maintenance is key to ensuring the system&#8217;s reliability. It should include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Inspection of <strong>HEPA and ULPA filters<\/strong>.<\/li>\n\n\n\n<li>Calibration of sensors and pressure valves.<\/li>\n\n\n\n<li>Cleaning of ducts and diffusers.<\/li>\n\n\n\n<li>Verification of laminar flow integrity.<\/li>\n\n\n\n<li>Monitoring of energy consumption and efficiency.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Frequency depends on the type of installation, though a quarterly review and a full annual validation are typically recommended.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">The HVAC system is not just the heart of a cleanroom; it&#8217;s the guarantee of its certification.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>HVAC system for cleanrooms<\/strong> is the pillar that guarantees compliance with the environmental conditions required by ISO 14644, GMP and FDA standards.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Correct design, together with continuous maintenance and good energy management, ensures air purity, process efficiency and environmental stability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At <strong>ISL Salas Limpias<\/strong>, we develop custom <strong>HVAC<\/strong> systems for cleanrooms, integrating the latest technology in environmental control, filtration and energy efficiency.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Contact us and we&#8217;ll help you create a safe, efficient environment compliant with ISO 14644 regulations.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/ingenic.es\/en\/contact\/\">Contact now<\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>HVAC for cleanrooms: the key to air, temperature and pressure control. Learn its critical functions (HEPA\/ULPA filters, differential pressure) and ISO 14644 regulations.<\/p>\n","protected":false},"author":2,"featured_media":6110,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[105,85],"tags":[],"class_list":["post-6111","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cleanroom-2","category-hvac"],"acf":[],"_links":{"self":[{"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/posts\/6111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/comments?post=6111"}],"version-history":[{"count":2,"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/posts\/6111\/revisions"}],"predecessor-version":[{"id":6266,"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/posts\/6111\/revisions\/6266"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/media\/6110"}],"wp:attachment":[{"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/media?parent=6111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/categories?post=6111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ingenic.es\/en\/wp-json\/wp\/v2\/tags?post=6111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}