{"product_id":"hitachi-yutaki-s80-very-high-temperature-heat-pump-indoor-unit-11kw-14kw-16kw","title":"Hitachi Yutaki S80 Very High Temperature Heat Pump Indoor Unit | 11kW 14kW 16kW","description":"\u003c!-- SEO Product Name: Hitachi Yutaki S80 Very High Temperature Heat Pump Indoor Unit | RWH-4.0VNFE \/ RWH-5.0VNFE \/ RWH-6.0VNFE | 11kW 14kW 16kW --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; font-family:Arial, Helvetica, sans-serif; color:#222222;\"\u003e\n\u003cp style=\"line-height:1.6; margin:0 0 16px 0;\"\u003eThe \u003cstrong\u003eHitachi Yutaki S80\u003c\/strong\u003e Very High Temperature indoor unit is a boiler-replacement air-to-water heat pump built around a \u003cstrong\u003etwin-refrigerant Smart Cascade cycle\u003c\/strong\u003e, combining an R410A first stage with an R134a second stage to deliver \u003cstrong\u003ehot water up to 80°C even at -20°C outdoor ambient\u003c\/strong\u003e — without any supplementary electric back-up. This variant page covers the three single-phase indoor unit sizes in the range: \u003cstrong\u003eRWH-4.0VNFE (11kW)\u003c\/strong\u003e, \u003cstrong\u003eRWH-5.0VNFE (14kW)\u003c\/strong\u003e and \u003cstrong\u003eRWH-6.0VNFE (16kW)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp style=\"line-height:1.6; margin:0 0 16px 0;\"\u003eEach indoor unit is a \u003cstrong\u003eType 1 (remote tank) configuration\u003c\/strong\u003e, designed to pair with a Hitachi RAS-WH(V)NP(E) outdoor unit and, where domestic hot water is required, a separately ordered \u003cstrong\u003ePC-ARFHE unit controller\u003c\/strong\u003e and remote DHW cylinder. The units are ideal for \u003cstrong\u003erefurbishment projects replacing oil or gas boilers\u003c\/strong\u003e, where existing high-temperature radiators need to be retained rather than replaced.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:10px; margin:20px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center; min-width:120px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e11-16kW\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.92;\"\u003eHeating capacity range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center; min-width:120px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e80°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.92;\"\u003eMax. water outlet temp.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center; min-width:120px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eUp to 5.0\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.92;\"\u003eCOP (7°C\/30-35°C)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center; min-width:120px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e-25 to +25°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.92;\"\u003eHeating operating range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center; min-width:120px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eR410A + R134a\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.92;\"\u003eSmart Cascade refrigerant\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#008377CF; color:#ffffff; border-radius:8px; padding:14px 10px; text-align:center; min-width:120px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e1-Phase\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.92;\"\u003eElectrical supply (230V)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FDECEA; border-left:4px solid #B3261E; border-radius:6px; padding:14px 16px; margin:16px 0;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#B3261E; margin-bottom:4px;\"\u003eQualified Installation Required\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.55;\"\u003eThis is an \u003cstrong\u003eR410A \/ R134a split air-to-water heat pump system\u003c\/strong\u003e requiring installation, commissioning and refrigerant work by a \u003cstrong\u003eGas Safe \/ F-Gas qualified engineer\u003c\/strong\u003e in accordance with Hitachi's installation manual. A compulsory first start-up, carried out by Hitachi Technical Service, is required before the system may be operated.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #8A5B00; border-radius:6px; padding:14px 16px; margin:16px 0;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#8A5B00; margin-bottom:4px;\"\u003eSystem Components Sold Separately\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.55;\"\u003eThe indoor unit alone does \u003cstrong\u003enot\u003c\/strong\u003e include the outdoor unit (RAS-WH(V)NP(E) series), the \u003cstrong\u003ePC-ARFHE remote controller\u003c\/strong\u003e (required for Type 1 DHW-with-remote-tank operation), or the domestic hot water cylinder. Confirm the correct outdoor unit pairing and accessory list at quote stage, as detailed hydraulic and electrical data for this exact indoor-unit line was not confirmed in the manufacturer documentation available at time of writing and has therefore been omitted from the specification table below.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F5F3; border-left:4px solid #008377; border-radius:6px; padding:14px 16px; margin:16px 0;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377; margin-bottom:4px;\"\u003eSmart Cascade Technology\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.55;\"\u003eHitachi's \u003cstrong\u003eSmart Cascade\u003c\/strong\u003e control automatically decides whether the R134a second stage needs to run, bypassing it during milder conditions so the unit relies on the more efficient first stage alone. During cold spells or high-temperature demand, the second stage engages to guarantee full output and 80°C water production even at -20°C outside air temperature.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-weight:700; font-size:17px; margin:22px 0 4px 0;\"\u003eModel Variants\u003c\/div\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; margin:14px 0; font-size:14.5px;\"\u003e\n\u003ctr\u003e\n\u003cth style=\"background:#008377CF; color:#ffffff; text-align:left; padding:8px 10px;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"background:#008377CF; color:#ffffff; text-align:left; padding:8px 10px;\"\u003eHeating Capacity\u003c\/th\u003e\n\u003cth style=\"background:#008377CF; color:#ffffff; text-align:left; padding:8px 10px;\"\u003ePhase\u003c\/th\u003e\n\u003cth style=\"background:#008377CF; color:#ffffff; text-align:left; padding:8px 10px;\"\u003eMax. Water Outlet\u003c\/th\u003e\n\u003cth style=\"background:#008377CF; color:#ffffff; text-align:left; padding:8px 10px;\"\u003eCOP (7°C\/35°C)\u003c\/th\u003e\n\u003cth style=\"background:#008377CF; color:#ffffff; text-align:left; padding:8px 10px;\"\u003eDimensions (H x W x D)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eRWH-4.0VNFE\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e11 kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e1-phase, 230V\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e80°C\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eUp to 5.0\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e600 x 623 x 802 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F3F3F3;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eRWH-5.0VNFE\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e14 kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e1-phase, 230V\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e80°C\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eUp to 5.0\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e600 x 623 x 802 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eRWH-6.0VNFE\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e16 kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e1-phase, 230V\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e80°C\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eUp to 5.0\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e600 x 623 x 802 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:12px; margin:20px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #E0E0E0; border-radius:8px; padding:16px; background:#FAFAFA;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377; margin-bottom:6px;\"\u003eTwin-Cycle Cascade Design\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.55; font-size:14.5px;\"\u003eA dedicated R134a heat pump circuit boosts water from mid-range to 80°C instead of relying on an electric immersion element, so high-temperature output is achieved \u003cstrong\u003ewithout the running costs of resistive heating\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #E0E0E0; border-radius:8px; padding:16px; background:#FAFAFA;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377; margin-bottom:6px;\"\u003eConstant Output in Deep Cold\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.55; font-size:14.5px;\"\u003eRated \u003cstrong\u003eheating capacity is maintained down to -15°C\u003c\/strong\u003e, and the unit continues to deliver 80°C water at -20°C outdoor air — addressing the output collapse that limits many single-cycle air source heat pumps in winter.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #E0E0E0; border-radius:8px; padding:16px; background:#FAFAFA;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377; margin-bottom:6px;\"\u003eDrop-In Boiler Replacement\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.55; font-size:14.5px;\"\u003eDesigned to work with the \u003cstrong\u003eexisting radiator circuit\u003c\/strong\u003e in a property, avoiding the cost and disruption of replacing emitters when switching a home from a gas or oil boiler to a heat pump.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #E0E0E0; border-radius:8px; padding:16px; background:#FAFAFA;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377; margin-bottom:6px;\"\u003eTwo Independent Heating Zones\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.55; font-size:14.5px;\"\u003eBuilt-in provision for \u003cstrong\u003etwo water output zones\u003c\/strong\u003e (for example underfloor heating plus radiators) allows a single indoor unit to serve mixed-emitter properties from one heat source.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #E0E0E0; border-radius:8px; padding:16px; background:#FAFAFA;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377; margin-bottom:6px;\"\u003eWeather Compensation Control\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.55; font-size:14.5px;\"\u003eThe unit controller continuously adjusts flow temperature against outdoor conditions, \u003cstrong\u003ereducing flow temperatures whenever possible\u003c\/strong\u003e to protect seasonal efficiency rather than running at a fixed high setpoint year-round.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #E0E0E0; border-radius:8px; padding:16px; background:#FAFAFA;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377; margin-bottom:6px;\"\u003eSolar \u0026amp; BMS Ready\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.55; font-size:14.5px;\"\u003eCompatible with \u003cstrong\u003esolar thermal integration\u003c\/strong\u003e and, via the optional Konnex interface, \u003cstrong\u003eBMS\/KNX building management systems\u003c\/strong\u003e for centralised control in larger properties.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-weight:700; font-size:17px; margin:22px 0 4px 0;\"\u003eFull Specification\u003c\/div\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; margin:14px 0; font-size:14.5px;\"\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#ffffff; font-weight:700; padding:8px 10px; border-radius:0;\"\u003eModel Range\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eModel code — 11kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eRWH-4.0VNFE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F3F3F3;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eModel code — 14kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eRWH-5.0VNFE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eModel code — 16kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eRWH-6.0VNFE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F3F3F3;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eType 1 — DHW operation with remote (separately supplied) tank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eCompatible outdoor unit\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eHitachi RAS-WH(V)NP(E) series (single phase)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#ffffff; font-weight:700; padding:8px 10px; border-radius:0;\"\u003ePerformance\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eRated heating capacity range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e11 – 16 kW across the three sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F3F3F3;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eCOP (7°C outside \/ 30-35°C water)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eUp to 5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eMax. water outlet temperature\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F3F3F3;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eHeating operating range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e-25°C to +25°C outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eCooling\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eNot applicable — heating-only unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#ffffff; font-weight:700; padding:8px 10px; border-radius:0;\"\u003eRefrigerant System\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003e1st stage refrigerant\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eR410A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F3F3F3;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003e2nd stage (cascade) refrigerant\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eR134a\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003e2nd stage refrigerant GWP\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e1430\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F3F3F3;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eCompressor type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eScroll, DC Inverter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#ffffff; font-weight:700; padding:8px 10px; border-radius:0;\"\u003eElectrical\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003ePower supply\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e230V \/ 1-phase \/ 50Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F3F3F3;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eIndoor\/outdoor communication\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eH-LINK II, 2-wire, non-polarised\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#ffffff; font-weight:700; padding:8px 10px; border-radius:0;\"\u003ePhysical\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eDimensions (H x W x D)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e600 x 623 x 802 mm (each model)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F3F3F3;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eCommodity code\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003e8415 83 00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#ffffff; font-weight:700; padding:8px 10px; border-radius:0;\"\u003eRequired Accessories (Not Included)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eRemote unit controller\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003ePC-ARFHE (required for Type 1 operation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F3F3F3;\"\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5; width:55%;\"\u003eDomestic hot water tank\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px; border-bottom:1px solid #E5E5E5;\"\u003eOrdered separately — e.g. DHWS200S-2.7H2E \/ DHWS260S-2.7H2E range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"font-weight:700; font-size:17px; margin:22px 0 8px 0;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdetails style=\"margin:8px 0; border:1px solid #E0E0E0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:700; cursor:pointer; list-style:none;\"\u003eWhat is the difference between the 11kW, 14kW and 16kW versions?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; line-height:1.6;\"\u003eThe three models — \u003cstrong\u003eRWH-4.0VNFE, RWH-5.0VNFE and RWH-6.0VNFE\u003c\/strong\u003e — share the same cabinet, controls and Smart Cascade technology, and differ only in \u003cstrong\u003erated heating output\u003c\/strong\u003e (11kW, 14kW and 16kW respectively). The correct size depends on the property's calculated heat loss and domestic hot water demand, and should be confirmed against the matching outdoor unit selection.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0; border:1px solid #E0E0E0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:700; cursor:pointer; list-style:none;\"\u003eDoes this indoor unit include the outdoor unit or hot water cylinder?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; line-height:1.6;\"\u003eNo. This listing is for the \u003cstrong\u003eindoor (hydraulic) unit only\u003c\/strong\u003e. A compatible Hitachi RAS-WH(V)NP(E) outdoor unit, a PC-ARFHE remote controller, and a domestic hot water cylinder must all be specified and ordered separately to complete the system.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0; border:1px solid #E0E0E0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:700; cursor:pointer; list-style:none;\"\u003eCan this heat pump work with my existing radiators?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; line-height:1.6;\"\u003eYes — the Yutaki S80 Very High Temperature range is specifically designed to output \u003cstrong\u003eup to 80°C water\u003c\/strong\u003e, making it suitable for \u003cstrong\u003eexisting high-temperature radiator systems\u003c\/strong\u003e without the emitter upgrades that lower-temperature heat pumps typically require.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0; border:1px solid #E0E0E0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:700; cursor:pointer; list-style:none;\"\u003eDoes output drop off in cold weather?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; line-height:1.6;\"\u003eRated \u003cstrong\u003eheating capacity is maintained down to -15°C outdoor air\u003c\/strong\u003e, and the unit can still produce 80°C water at -20°C outdoor ambient without a supplementary electric heater, thanks to the second R134a refrigerant stage engaging automatically in cold conditions.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0; border:1px solid #E0E0E0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:700; cursor:pointer; list-style:none;\"\u003eWhat qualifications does my installer need?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; line-height:1.6;\"\u003eInstallation involves \u003cstrong\u003erefrigerant pipework across two circuits (R410A and R134a)\u003c\/strong\u003e and must be carried out and commissioned by a \u003cstrong\u003esuitably qualified, F-Gas certified heating engineer\u003c\/strong\u003e, with a compulsory first start-up performed by Hitachi Technical Service before the system is handed over.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin:8px 0; border:1px solid #E0E0E0; border-radius:6px; overflow:hidden;\"\u003e\n\u003csummary style=\"background:#008377CF; color:#ffffff; padding:10px 14px; font-weight:700; cursor:pointer; list-style:none;\"\u003eIs a solar thermal or BMS connection possible?\u003c\/summary\u003e\n\u003cdiv style=\"padding:12px 14px; line-height:1.6;\"\u003eYes. The Yutaki S80 control system supports \u003cstrong\u003esolar thermal integration\u003c\/strong\u003e and, via the optional Konnex interface accessory, connection to \u003cstrong\u003eKNX-based building management systems\u003c\/strong\u003e for centralised monitoring and control.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Hitachi","offers":[{"title":"11kW","offer_id":65254719848797,"sku":"RWH-4.0VNFE","price":4500.0,"currency_code":"GBP","in_stock":true},{"title":"14kW","offer_id":65254719881565,"sku":"RWH-5.0VNFE","price":4670.0,"currency_code":"GBP","in_stock":true},{"title":"16kW","offer_id":65254719914333,"sku":"RWH-6.0VNFE","price":4830.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/HitachiYutakiS80VeryHighTemperatureHeatpump-IndoorUnit.png?v=1784047993","url":"https:\/\/qualityheating.co.uk\/products\/hitachi-yutaki-s80-very-high-temperature-heat-pump-indoor-unit-11kw-14kw-16kw","provider":"AIZO Quality Heating","version":"1.0","type":"link"}