{"product_id":"underfloor-heating-single-room-control-unit-with-grundfos-upm3-flex-pump","title":"Underfloor Heating Single Room Control Unit With Grundfos UPM3 Flex Pump","description":"\u003ch1\u003e\u003cspan\u003eUnderfloor Heating Single-Room Control Unit with Grundfos Circulator Pump\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eA compact, ready-to-install solution for adding water-based underfloor heating to individual rooms of up to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e20 m²\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, including bathrooms, extensions, conservatories and other small domestic spaces. Designed to connect to an existing radiator or central heating system, this single-room control unit provides comfortable, evenly distributed heat without the need for extensive system modifications or additional mounting brackets.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe unit incorporates a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGrundfos UPM3 FLEX AS 25-70 130 high-efficiency circulator pump\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, featuring variable-speed PWM control, a maximum head of 7 metres and a rated energy efficiency index (EEI) of ≤0.20. A built-in thermostatic mixing valve blends and regulates the water temperature supplied to the underfloor heating circuit, helping maintain suitable operating temperatures and reduce the risk of floor overheating.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCoverage and Heating Performance\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMaximum coverage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Up to 20 m² with pipe spacing of 200 mm.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHigher-output configuration:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Up to 15 m² with pipe spacing of 150 mm.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMaximum stated heat output:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 3 kW.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eApplication:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Single-zone, water-based underfloor heating for small domestic areas.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eActual heating performance and achievable coverage depend on heat loss, floor construction, insulation, pipe layout, water temperature and the capacity of the existing heat source.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features and Technical Benefits\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003e1. Grundfos UPM3 FLEX AS 25-70 130 Circulator Pump\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe integrated high-efficiency circulator pump provides controlled water circulation through the underfloor heating circuit. Its PWM (pulse-width modulation) control supports variable-speed operation to help match pump performance to system demand.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEnergy efficiency index (EEI): ≤0.20.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMaximum head: 7 m.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePower consumption: 2–52 W, depending on operating conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompact 130 mm installation length.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for efficient circulation with reduced electrical consumption.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eEnergy savings depend on the system configuration, operating conditions and the pump used for comparison.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e2. Integrated Thermostatic Mixing Valve\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe thermostatic mixing valve regulates the underfloor heating flow temperature by blending hot water from the primary heating system with cooler return water.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHelps maintain a suitable flow temperature for underfloor heating.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReduces the risk of excessive floor temperatures when correctly selected and installed.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSupports more consistent heat distribution throughout the heated area.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEnables underfloor heating to operate alongside a conventional radiator heating system.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eAppropriate temperature settings and any additional floor-temperature protection should be selected according to the floor manufacturer's requirements and the overall system design.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e3. Compatibility with Heating Systems\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe unit is intended for integration with a suitable existing hydronic heating system. Potential heat sources include gas or oil boilers and appropriately designed renewable heating systems, such as air-source and ground-source heat pumps, solar thermal systems and certain solid-fuel installations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCompatibility depends on the heat source, available water temperatures, hydraulic arrangement, system controls and manufacturer requirements. Additional controls or hydraulic separation may be necessary for some installations.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e4. Integrated Components\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe control unit combines the principal components required to regulate and circulate water through a single underfloor heating zone, including:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThermostatic mixing valve.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGrundfos circulator pump.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFlow and return connections.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIsolation valves.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMounting kit.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe compact assembly is designed to simplify installation and reduce the space required for separate components. Connection sizes, included fittings and mounting requirements should be confirmed against the manufacturer's technical specification before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e5. Compact Installation\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for applications where installing a complete multi-zone underfloor heating manifold would be unnecessary or impractical, the unit offers a space-saving approach to single-room heating.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIts integrated components help reduce installation complexity and can minimise disruption when adding underfloor heating to an existing property. Suitability depends on access to the primary heating circuit and the availability of adequate installation space.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e6. Efficient, Comfortable Heating\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWater-based underfloor heating distributes warmth across the floor surface, providing comfortable radiant heat with less reliance on conventional radiators within the heated room.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhen correctly designed and commissioned, the system can support efficient operation, lower-temperature heating and integration with compatible renewable heat sources.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eTemperature Regulation and Single-Zone Control\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe integrated mixing valve is designed to regulate the temperature of the water entering the underfloor heating circuit, helping deliver controlled, consistent heating from an existing primary heat source.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis arrangement is particularly suitable for individual rooms where dedicated underfloor heating is required without converting the entire property. The final installation should incorporate appropriate room-temperature controls, flow-temperature settings and any additional safety devices required by the system design.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eIdeal Applications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThis single-room underfloor heating control unit is suitable for projects such as:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBathroom and en-suite renovations.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSmall extensions and conservatories.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIndividual rooms being upgraded to underfloor heating.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eTargeted heating improvements in properties with existing radiator systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompatible low-temperature heating installations.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eProduct summary:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e A compact single-zone underfloor heating control unit incorporating a Grundfos UPM3 FLEX AS 25-70 130 circulator pump and thermostatic mixing valve, designed for water-based underfloor heating installations covering up to 20 m² under suitable design conditions.\u003c\/span\u003e\u003c\/p\u003e","brand":"Happy Waves","offers":[{"title":"Default Title","offer_id":55820081824086,"sku":null,"price":175.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1070\/8310\/4598\/files\/Single-Room-Mixture-Pump-Pack-with-Grundfos-UPM3-Flex-Pump-TUFHC.jpg?v=1792347686","url":"https:\/\/happywaves.co.uk\/products\/underfloor-heating-single-room-control-unit-with-grundfos-upm3-flex-pump","provider":"Happy Waves","version":"1.0","type":"link"}