{"product_id":"vaillant-ecofit-sustain-618-erp-system-boiler-only","title":"Vaillant ecoFIT Sustain 618 (ErP) System Boiler Only","description":"\u003ch3\u003eVaillant ecoFIT Sustain 618 (ErP) System Boiler\u003c\/h3\u003e\n\nThe Vaillant ecoFIT Sustain 618 system boiler is a compact and efficient heating solution designed to work alongside a separate hot water cylinder. As one of the most compact system boilers developed by Vaillant, it is ideal for installations where space is limited, such as kitchen cupboards, airing cupboards, or utility rooms.\n\nDesigned for both installers and homeowners, the ecoFIT Sustain 618 offers flexible siting and straightforward installation thanks to its compact size and lightweight design. The boiler also includes a high-efficiency pump to help reduce energy consumption while still delivering reliable and consistent heating performance.\n\nThis system boiler is suitable for modern sealed heating systems and does not require a cold water tank in the loft, making it a practical and space-saving option for many homes.\n\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\nCompact and Lightweight Design\n\nIdeal for Installation in Cupboards or Small Spaces\n\nSystem Boiler – Works with a Hot Water Cylinder\n\nNo Cold Water Tank Required\n\nEasy Installation and Flexible Siting\n\nHigh Efficiency Pump for Reduced Energy Consumption\n\nReliable Heating Performance\n\nA Rated for Heating Efficiency\n\n2 Year Warranty (Subject to Manufacturer’s T\u0026amp;Cs)\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\nProduct: Vaillant ecoFIT Sustain 618 (ErP) System Boiler\n\nGTIN: 4024074850367\n\nProduct Type: Gas System Boiler\n\nModel: ecoFIT Sustain\n\nCentral Heating Output: 18kW (61,000 BTU)\n\nErP Heating Rating: A Rated\n\nGross Weight (Including Packaging): 33kg\n\nNet Weight: 32kg\n\nHeight: 700mm\n\nWidth: 390mm\n\nDepth: 295mm\n\nWarranty: 2 Years (Subject to Manufacturer’s T\u0026amp;Cs)\n\n\u003ch3\u003eWhat Is a System Boiler?\u003c\/h3\u003e\n\nA system boiler provides heating directly to radiators and works with a separate hot water cylinder to store hot water. Unlike heat-only boilers, system boilers do not require a cold water tank in the loft, making them suitable for sealed heating systems and homes where loft space is limited.\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003ch4\u003eWhat is the difference between a system boiler and a combi boiler?\u003c\/h4\u003e\n\nA system boiler works with a hot water cylinder, while a combi boiler heats water on demand and does not require a cylinder.\n\n\u003ch4\u003eIs an 18kW system boiler suitable for a medium-sized home?\u003c\/h4\u003e\n\nYes, an 18kW system boiler is typically suitable for medium-sized homes depending on insulation and heating demand.\n\n\u003ch4\u003eCan this boiler replace an older system boiler?\u003c\/h4\u003e\n\nYes, the ecoFIT Sustain 618 is a suitable replacement for older system boilers and can improve efficiency and performance.","brand":"Vaillant","offers":[{"title":"Default Title","offer_id":52979143999830,"sku":"148504","price":825.81,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/vaillant-ecofit-sustain-618-erp-system-boiler-only-6346947.jpg?v=1775036007","url":"https:\/\/jjbuildingmaterials.co.uk\/products\/vaillant-ecofit-sustain-618-erp-system-boiler-only","provider":"JJ Building Materials","version":"1.0","type":"link"}