{"id":50089,"date":"2025-07-03T14:15:42","date_gmt":"2025-07-03T13:15:42","guid":{"rendered":"https:\/\/ecoforest.com\/?p=50089"},"modified":"2025-07-04T13:49:20","modified_gmt":"2025-07-04T12:49:20","slug":"159-housing-units-in-madrid-spain-renovation-of-a-dhw-preheating-system-with-pv","status":"publish","type":"post","link":"https:\/\/ecoforest.com\/en\/reference-installations\/159-housing-units-in-madrid-spain-renovation-of-a-dhw-preheating-system-with-pv\/","title":{"rendered":"159 housing units in Madrid (Spain) \u2013 Renovation of a DHW preheating system with PV"},"content":{"rendered":"\n<div class=\"inherit-container-width wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"wp-block-group__inner-container\"><style>.wp-block-kadence-iconlist.kt-svg-icon-list-items_e91a48-36:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items_e91a48-36 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:10px;margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items_e91a48-36 ul.kt-svg-icon-list{grid-row-gap:5px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items_e91a48-36 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:10px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items_e91a48-36 kt-svg-icon-list-columns-1 alignnone\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-_f0c2b0-68 .kt-svg-icon-list-single{font-size:20px !important;color:#97bf0d !important;}.kt-svg-icon-list-item-_f0c2b0-68 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-_f0c2b0-68 kt-svg-icon-list-style-default\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fe_checkCircle kt-svg-icon-list-single\"><svg viewBox=\"0 0 24 24\"  fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Location: Madrid (Spain)<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-_ad93ea-fb .kt-svg-icon-list-single{font-size:20px !important;color:#97bf0d !important;}.kt-svg-icon-list-item-_ad93ea-fb .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-_ad93ea-fb kt-svg-icon-list-style-default\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fe_checkCircle kt-svg-icon-list-single\"><svg viewBox=\"0 0 24 24\"  fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Category: 8 air-source heat pumps with PV hybridisation <\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-_aa501b-f8 .kt-svg-icon-list-single{font-size:20px !important;color:#97bf0d !important;}.kt-svg-icon-list-item-_aa501b-f8 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-_aa501b-f8 kt-svg-icon-list-style-default\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fe_checkCircle kt-svg-icon-list-single\"><svg viewBox=\"0 0 24 24\"  fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Model: 8 <a href=\"https:\/\/ecoforest.com\/en\/products\/heat-pumps\/air-source-heat-pumps\/ecoair-3-18-pro\/\" target=\"_blank\" rel=\"noreferrer noopener\">ecoAIR\u207a 3-18 PRO<\/a><\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-_8ac437-61 .kt-svg-icon-list-single{font-size:20px !important;color:#97bf0d !important;}.kt-svg-icon-list-item-_8ac437-61 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-_8ac437-61 kt-svg-icon-list-style-default\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fe_checkCircle kt-svg-icon-list-single\"><svg viewBox=\"0 0 24 24\"  fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Power: 144 kW<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-_f363e2-72 .kt-svg-icon-list-single{font-size:20px !important;color:#97bf0d !important;}.kt-svg-icon-list-item-_f363e2-72 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-_f363e2-72 kt-svg-icon-list-style-default\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fe_checkCircle kt-svg-icon-list-single\"><svg viewBox=\"0 0 24 24\"  fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Services: Domestic hot water (DHW)<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-_2a3de9-99 .kt-svg-icon-list-single{font-size:20px !important;color:#97bf0d !important;}.kt-svg-icon-list-item-_2a3de9-99 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-_2a3de9-99 kt-svg-icon-list-style-default\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fe_checkCircle kt-svg-icon-list-single\"><svg viewBox=\"0 0 24 24\"  fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Installer: <a href=\"https:\/\/www.sunflowerenergias.es\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Sunflower Energ\u00edas<\/a><\/span><\/li>\n<\/ul><\/div>\n<\/div><\/div>\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:\/\/ecoforest.com\/en\/request-quote\/\">Look for an installer<\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>In the Butarque neighbourhood (Madrid), a major energy refurbishment project has been carried out, focusing on the replacement of an obsolete system based on thermal panels and individual natural gas boilers, whose main function was the production of DHW.<\/p>\n\n\n\n<p>Our client, Sunflower Energies, opted for a modern and highly efficient solution: the installation of 8 <a href=\"https:\/\/ecoforest.com\/en\/products\/heat-pumps\/air-source-heat-pumps\/ecoair-3-18-pro\/\">ecoAIR<sup>+<\/sup> 3-18 PRO<\/a> air-source heat pumps, running on natural refrigerant R290, supported by a photovoltaic plant consisting of 120 solar panels.<\/p>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading_e48e19-7f, .wp-block-kadence-advancedheading.kt-adv-heading_e48e19-7f[data-kb-block=\"kb-adv-heading_e48e19-7f\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_e48e19-7f mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_e48e19-7f[data-kb-block=\"kb-adv-heading_e48e19-7f\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<h2 class=\"kt-adv-heading_e48e19-7f wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_e48e19-7f\"><strong>Maximal energy efficiency<\/strong><\/h2>\n\n\n\n<p>The selected air-source heat pumps have a combined capacity of 144 kW, allowing simultaneous and efficient production of DHW, heating and cooling.<\/p>\n\n\n\n<p>Energy consumption before and after the intervention:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Previous system (natural gas): 308,857.50 kWh\/year<\/li>\n\n\n\n<li>New air-source system (grid): 93,593 kWh\/year\n<ul class=\"wp-block-list\">\n<li>Of which 88,914.18 kWh are generated by photovoltaic self-consumption (95% of the total).<\/li>\n\n\n\n<li>Only 4,679 kWh\/year are consumed directly from the grid.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading_927e53-e6, .wp-block-kadence-advancedheading.kt-adv-heading_927e53-e6[data-kb-block=\"kb-adv-heading_927e53-e6\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_927e53-e6 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_927e53-e6[data-kb-block=\"kb-adv-heading_927e53-e6\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<h2 class=\"kt-adv-heading_927e53-e6 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_927e53-e6\"><strong>Savings<\/strong><\/h2>\n\n\n\n<p>Thanks to the new system, users have experienced an estimated economic saving of 20,506 euros per year, which represents a reduction of 80.8% compared to the previous system based on natural gas.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Amortisation<\/strong><\/h2>\n\n\n\n<p>By grouping the savings achieved by the installation, together with the financing obtained through CAEs, IBI rebates and IRPF deductions, a payback period of less than 4 years is calculated.<\/p>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading_c8b261-25, .wp-block-kadence-advancedheading.kt-adv-heading_c8b261-25[data-kb-block=\"kb-adv-heading_c8b261-25\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_c8b261-25 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_c8b261-25[data-kb-block=\"kb-adv-heading_c8b261-25\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<h2 class=\"kt-adv-heading_c8b261-25 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_c8b261-25\"><strong>Sustainability and environmental commitment<\/strong><\/h2>\n\n\n\n<p>This project has not only improved the energy efficiency of the residential complex, but has also demonstrated a strong commitment to sustainability. Thanks to the new installation, a reduction of 46.7 tonnes of CO\u2082 per year is achieved, equivalent to an 88.8% reduction in emissions compared to the previous system.<\/p>\n\n\n\n<p>This success story has been included in the ANESE (National Association of Energy Services Companies) Technology Guide, as an example of good practice and a success story that can be replicated in the residential sector.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"630\" src=\"https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/07\/sunflower_instalacion_madrid_159_viviendas-1.jpg\" alt=\"\" class=\"wp-image-50079\" title=\"\" srcset=\"https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/07\/sunflower_instalacion_madrid_159_viviendas-1.jpg 1200w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/07\/sunflower_instalacion_madrid_159_viviendas-1-300x158.jpg 300w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/07\/sunflower_instalacion_madrid_159_viviendas-1-1024x538.jpg 1024w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/07\/sunflower_instalacion_madrid_159_viviendas-1-768x403.jpg 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">Installation of ecoAIR\u207a 3-18 PRO for DHW system in 159 dwellings in Madrid.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>In the Butarque neighbourhood (Madrid), a major energy refurbishment project has been carried out, focusing on the replacement of an obsolete system based on thermal panels and individual natural gas boilers, whose main function was the production of DHW. Our client, Sunflower Energies, opted for a modern and highly efficient solution: the installation of 8 [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":50053,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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