{"product_id":"grant-aerona-290-r290-monobloc-air-source-heat-pump-4-6-5-9-12-15-5kw-variants","title":"Grant Aerona 290 R290 Monobloc Air Source Heat Pump — 4\/6.5\/9\/12\/15.5kW Variants","description":"\u003c!-- SEO Product Name: Grant Aerona 290 R290 Monobloc Air Source Heat Pump — 4\/6.5\/9\/12\/15.5kW Variants --\u003e\n\u003cdiv style=\"font-size:16px;font-family:Arial,Helvetica,sans-serif;color:#222;max-width:900px;margin:0 auto;line-height:1.55;\"\u003e\n\u003cp style=\"margin:0 0 14px 0;\"\u003eThe \u003cstrong\u003eGrant Aerona 290\u003c\/strong\u003e is Grant UK's fifth-generation air-to-water monobloc using natural \u003cstrong\u003eR290 propane refrigerant (GWP 3)\u003c\/strong\u003e. Available in \u003cstrong\u003efive capacities from 4 kW to 15.5 kW\u003c\/strong\u003e — select the output that matches your calculated heat loss on the variant selector. Every variant shares the same platform: DC twin-rotary compressor, electronic expansion valve, \u003cstrong\u003eR290 leak sensor with independent ventilation channels\u003c\/strong\u003e, Quiet Mark accreditation across the range, powder-coated black casing, MCS certification, BUS grant eligibility, and up to \u003cstrong\u003e7 years guarantee\u003c\/strong\u003e when installed by a Grant G1 installer.\u003c\/p\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:18px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;min-width:120px;background:#008377CF;color:#fff;padding:14px 10px;text-align:center;border-radius:6px;\"\u003e\n\u003cdiv style=\"font-size:22px;font-weight:700;line-height:1.1;\"\u003e4–15.5 kW\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:4px;opacity:0.95;letter-spacing:0.3px;text-transform:uppercase;\"\u003eOutput range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;min-width:120px;background:#008377CF;color:#fff;padding:14px 10px;text-align:center;border-radius:6px;\"\u003e\n\u003cdiv style=\"font-size:22px;font-weight:700;line-height:1.1;\"\u003eR290\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:4px;opacity:0.95;letter-spacing:0.3px;text-transform:uppercase;\"\u003eGWP 3 propane\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;min-width:120px;background:#008377CF;color:#fff;padding:14px 10px;text-align:center;border-radius:6px;\"\u003e\n\u003cdiv style=\"font-size:22px;font-weight:700;line-height:1.1;\"\u003eA+++\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:4px;opacity:0.95;letter-spacing:0.3px;text-transform:uppercase;\"\u003eErP rating\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;min-width:120px;background:#008377CF;color:#fff;padding:14px 10px;text-align:center;border-radius:6px;\"\u003e\n\u003cdiv style=\"font-size:22px;font-weight:700;line-height:1.1;\"\u003e-25 to +35°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:4px;opacity:0.95;letter-spacing:0.3px;text-transform:uppercase;\"\u003eOperating envelope\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;min-width:120px;background:#008377CF;color:#fff;padding:14px 10px;text-align:center;border-radius:6px;\"\u003e\n\u003cdiv style=\"font-size:22px;font-weight:700;line-height:1.1;\"\u003eQuiet Mark\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:4px;opacity:0.95;letter-spacing:0.3px;text-transform:uppercase;\"\u003eFull range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;min-width:120px;background:#008377CF;color:#fff;padding:14px 10px;text-align:center;border-radius:6px;\"\u003e\n\u003cdiv style=\"font-size:22px;font-weight:700;line-height:1.1;\"\u003eUp to 7 yrs\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:4px;opacity:0.95;letter-spacing:0.3px;text-transform:uppercase;\"\u003eG1 guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F3F1;border-left:4px solid #008377;padding:14px 16px;margin:16px 0;border-radius:0 4px 4px 0;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;margin-bottom:4px;\"\u003eBUS grant eligible\u003c\/div\u003e\n\u003cdiv\u003eEvery Aerona 290 model is MCS accredited and eligible for the UK \u003cstrong\u003eBoiler Upgrade Scheme grant\u003c\/strong\u003e when installed by an MCS-certified installer in an eligible property. The whole range is also \u003cstrong\u003eConnect \u0026amp; Notify approved\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E0;border-left:4px solid #C89200;padding:14px 16px;margin:16px 0;border-radius:0 4px 4px 0;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#C89200;margin-bottom:4px;\"\u003eR290 outdoor unit siting\u003c\/div\u003e\n\u003cdiv\u003eR290 is an A3 flammable refrigerant. UK installation requires minimum clearances from doors, windows, drains and ignition sources per Grant's technical manual. The unit's \u003cstrong\u003erefrigerant leak sensor and independent ventilation channels\u003c\/strong\u003e mitigate risk, but siting must still be designed correctly — most domestic gardens accommodate the unit easily; constrained sites need design review.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FBEAE9;border-left:4px solid #B3261E;padding:14px 16px;margin:16px 0;border-radius:0 4px 4px 0;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#B3261E;margin-bottom:4px;\"\u003eMCS + G1 installer required for grant and 7-year guarantee\u003c\/div\u003e\n\u003cdiv\u003eTo claim the Boiler Upgrade Scheme grant the installer must be \u003cstrong\u003eMCS-certified\u003c\/strong\u003e. To unlock the 7-year Grant guarantee, the installer must also hold \u003cstrong\u003eGrant G1 accreditation\u003c\/strong\u003e (completed Grant heat pump training). Quality Heating can connect you with MCS + G1 installers.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FBEAE9;border-left:4px solid #B3261E;padding:14px 16px;margin:16px 0;border-radius:0 4px 4px 0;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#B3261E;margin-bottom:4px;\"\u003eGlycol antifreeze is not permitted — use mechanical anti-freeze valves\u003c\/div\u003e\n\u003cdiv\u003ePer Grant's installation manual, \u003cstrong\u003eglycol antifreeze cannot be used\u003c\/strong\u003e in Aerona 290 primary circuits. External pipework must be protected using \u003cstrong\u003emechanical anti-freeze valves\u003c\/strong\u003e — the Aerona 290 has its own anti-freeze heater on the plate heat exchanger and heated base tray for the unit itself. Getting this wrong risks freeze damage and voids warranty.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color:#008377;font-size:18px;margin:24px 0 10px 0;padding-bottom:6px;border-bottom:2px solid #008377CF;\"\u003eChoose your capacity\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable style=\"border-collapse:collapse;width:100%;font-size:14.5px;margin:8px 0;\"\u003e\n\u003ctr\u003e\n\u003cth style=\"background:#008377CF;color:#fff;padding:9px 12px;border:1px solid #008377;text-align:left;font-weight:700;\"\u003eHeating output\u003c\/th\u003e\n\u003cth style=\"background:#008377CF;color:#fff;padding:9px 12px;border:1px solid #008377;text-align:left;font-weight:700;\"\u003eGrant model code\u003c\/th\u003e\n\u003cth style=\"background:#008377CF;color:#fff;padding:9px 12px;border:1px solid #008377;text-align:left;font-weight:700;\"\u003eCabinet family\u003c\/th\u003e\n\u003cth style=\"background:#008377CF;color:#fff;padding:9px 12px;border:1px solid #008377;text-align:left;font-weight:700;\"\u003eTypical property fit\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e4 kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eHPR2904\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eSmall (shared 4\/6.5)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eSmall, well-insulated 1–2 bedroom homes and flats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e6.5 kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eHPR29065\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eSmall (shared 4\/6.5)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eTypical 2–3 bedroom UK homes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e9 kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eHPR2909\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eLarge (shared 9\/12\/15.5)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e3–4 bedroom semis and detached homes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e12 kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eHPR29012\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eLarge (shared 9\/12\/15.5)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eLarger 4-bedroom detached properties\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e15.5 kW\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eHPR290155\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eLarge (shared 9\/12\/15.5)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eVery large detached, older retrofits, or high-heat-loss properties\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E0;border-left:4px solid #C89200;padding:14px 16px;margin:16px 0;border-radius:0 4px 4px 0;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#C89200;margin-bottom:4px;\"\u003eTwo cabinet families across the range\u003c\/div\u003e\n\u003cdiv\u003eThe Aerona 290 uses \u003cstrong\u003etwo chassis sizes\u003c\/strong\u003e: 4 kW and 6.5 kW share a smaller cabinet; 9 kW, 12 kW and 15.5 kW share a larger cabinet. Grant publish separate UKCA safety declarations for each family. This matters when planning siting — confirm outdoor footprint against the specific model dimensions in Grant's installation manual.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F3F1;border-left:4px solid #008377;padding:14px 16px;margin:16px 0;border-radius:0 4px 4px 0;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;margin-bottom:4px;\"\u003eSizing tip\u003c\/div\u003e\n\u003cdiv\u003eEvery Aerona 290 is rated at \u003cstrong\u003e-5°C air \/ 55°C flow\u003c\/strong\u003e — Grant's published outputs use this condition. In milder ambients the delivered capacity increases; at deeper ambients (down to -25°C) the unit continues to operate but at reduced output. Always size from a heat loss survey against your local design temperature.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color:#008377;font-size:18px;margin:24px 0 10px 0;padding-bottom:6px;border-bottom:2px solid #008377CF;\"\u003eWhy choose the Aerona 290\u003c\/h3\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:10px;margin:14px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;min-width:240px;background:#fff;border:1px solid #E5E7EB;border-top:3px solid #008377CF;padding:14px 16px;border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;margin-bottom:6px;\"\u003eR290 refrigerant — GWP 3\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px;\"\u003eNatural propane refrigerant with a GWP of just 3 — close to \u003cstrong\u003eone-thousand times lower\u003c\/strong\u003e than legacy split heat pump refrigerants. The most future-proof choice ahead of tightening UK F-Gas regulation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;min-width:240px;background:#fff;border:1px solid #E5E7EB;border-top:3px solid #008377CF;padding:14px 16px;border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;margin-bottom:6px;\"\u003eOperates -25°C to +35°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px;\"\u003eReliable operation across the UK winter envelope down to -25°C ambient — dependable heat delivery through cold snaps without leaning on backup electric.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;min-width:240px;background:#fff;border:1px solid #E5E7EB;border-top:3px solid #008377CF;padding:14px 16px;border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;margin-bottom:6px;\"\u003eA+++ ErP rating\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px;\"\u003eTop-tier seasonal efficiency label at 35°C flow — excellent SCOPs across every capacity in the range.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;min-width:240px;background:#fff;border:1px solid #E5E7EB;border-top:3px solid #008377CF;padding:14px 16px;border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;margin-bottom:6px;\"\u003eQuiet Mark across the range\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px;\"\u003e\n\u003cstrong\u003eEvery\u003c\/strong\u003e Aerona 290 carries a Quiet Mark accreditation — not just selected models — thanks to acoustic cotton sound insulation in the casing and twin eccentric cam levers with balancing weights.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;min-width:240px;background:#fff;border:1px solid #E5E7EB;border-top:3px solid #008377CF;padding:14px 16px;border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;margin-bottom:6px;\"\u003eR290 safety built-in\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px;\"\u003e\n\u003cstrong\u003eRefrigerant leak sensor\u003c\/strong\u003e plus \u003cstrong\u003eindependent ventilation channels\u003c\/strong\u003e designed into the unit — engineered from the ground up around A3 refrigerant handling.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;min-width:240px;background:#fff;border:1px solid #E5E7EB;border-top:3px solid #008377CF;padding:14px 16px;border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;margin-bottom:6px;\"\u003eElectronic expansion valve + 4-way defrost\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px;\"\u003eEEV precisely modulates refrigerant flow into the evaporator; the 4-way valve reverses cycle for efficient defrost. Result: tighter capacity control and quicker recovery from defrost.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;min-width:240px;background:#fff;border:1px solid #E5E7EB;border-top:3px solid #008377CF;padding:14px 16px;border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;margin-bottom:6px;\"\u003eAnti-freeze heater on HX and base tray\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px;\"\u003ePlate heat exchanger and base tray both have integrated anti-freeze heaters — protects the unit itself; external pipework needs mechanical anti-freeze valves (glycol not permitted).\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;min-width:240px;background:#fff;border:1px solid #E5E7EB;border-top:3px solid #008377CF;padding:14px 16px;border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;margin-bottom:6px;\"\u003ePowder-coated black finish\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px;\"\u003eDurable powder-coated black casing — sleek modern styling and long-lasting outdoor finish.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color:#008377;font-size:18px;margin:24px 0 10px 0;padding-bottom:6px;border-bottom:2px solid #008377CF;\"\u003ePlatform specification (all variants)\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable style=\"border-collapse:collapse;width:100%;font-size:14.5px;margin:8px 0;\"\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eRange\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eGrant Aerona 290\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eR290 monobloc air source heat pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eAvailable capacities\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e4 kW \/ 6.5 kW \/ 9 kW \/ 12 kW \/ 15.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eModel codes\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eHPR2904 \/ HPR29065 \/ HPR2909 \/ HPR29012 \/ HPR290155\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eRefrigerant\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eR290 propane (GWP 3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eCompressor\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eDC twin-rotary, inverter-driven\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eExpansion valve\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eElectronic (EEV)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eDefrost\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e4-way reversing valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eCirculating pump\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eBuilt-in PWM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eRating condition\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e-5°C air \/ 55°C water flow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eOperating ambient envelope\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e-25°C to +35°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eErP energy label\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eA+++ (at 35°C flow)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eElectrical supply\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003e230V, 50Hz, single-phase (all variants)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eCertifications\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eMCS certified, BUS grant eligible, Connect \u0026amp; Notify\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eAcoustic\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eQuiet Mark (full range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eSafety\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eRefrigerant leak sensor, independent ventilation channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eAnti-freeze\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003ePlate heat exchanger heater + heated base tray (glycol NOT permitted in primary; use mechanical anti-freeze valves)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eCabinet family\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eSmall (4\/6.5 kW) or Large (9\/12\/15.5 kW)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FAFA;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003ePowder-coated black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;font-weight:600;width:42%;\"\u003eGuarantee\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;border:1px solid #E5E7EB;\"\u003eUp to 7 years parts and labour (G1 installer required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3 style=\"color:#008377;font-size:18px;margin:24px 0 10px 0;padding-bottom:6px;border-bottom:2px solid #008377CF;\"\u003eWhat's in the box (every variant)\u003c\/h3\u003e\n\u003cul style=\"padding-left:22px;margin:8px 0;\"\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eGrant Aerona 290 outdoor monobloc unit (capacity per selected variant)\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eThree condensate drain elbows\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eThree cable glands\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eSix crimp ring terminal fittings\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eErP energy label\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eR290 installation \u0026amp; user instructions (Grant DOC 0204)\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eBase hole blanking plugs (9\/12\/15.5 kW only — six per unit)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color:#008377;font-size:18px;margin:24px 0 10px 0;padding-bottom:6px;border-bottom:2px solid #008377CF;\"\u003eWhat you'll also need (sold separately)\u003c\/h3\u003e\n\u003cul style=\"padding-left:22px;margin:8px 0;\"\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eGrant Aerona Smart Controller (Standard or PP-cylinder variant — see our Grant accessory listings)\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eGrant Aerona Smart WiFi Hub for app-based remote access\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eDHW cylinder (heat-pump-suitable, indirect coil sized for low flow temperature)\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eOptional wall bracket kit (see Grant Wall Bracket accessory listing)\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003e\n\u003cstrong\u003eMechanical anti-freeze valves\u003c\/strong\u003e on primary flow and return (glycol not permitted)\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eGrant Aerona 290 Flexi Hose \u0026amp; Valve Kit (Standard 28 mm or Primary Pro Insulated 28 mm)\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eMagnetic system filter on the primary return\u003c\/li\u003e\n\u003cli style=\"margin-bottom:5px;\"\u003eGrant Aerona Installation Pack (Pack P \/ Q \/ R depending on system topology)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color:#008377;font-size:18px;margin:24px 0 10px 0;padding-bottom:6px;border-bottom:2px solid #008377CF;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdetails style=\"border:1px solid #E5E7EB;border-radius:4px;margin:8px 0;overflow:hidden;\"\u003e\u003csummary style=\"cursor:pointer;background:#008377CF;color:#fff;padding:10px 14px;font-weight:600;list-style:none;\"\u003eWhich kW should I choose?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px;background:#FFFFFF;\"\u003eChoose the variant that matches your \u003cstrong\u003ecalculated heat loss\u003c\/strong\u003e against your local winter design temperature. As a rough guide: 4 kW for small well-insulated 1–2 bed homes; 6.5 kW for typical 2–3 bed homes; 9 kW for 3–4 bed semis and detached; 12 kW for larger 4-bed detached; 15.5 kW for very large or lightly-insulated properties. \u003cstrong\u003eAlways confirm with a heat loss survey.\u003c\/strong\u003e\n\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #E5E7EB;border-radius:4px;margin:8px 0;overflow:hidden;\"\u003e\u003csummary style=\"cursor:pointer;background:#008377CF;color:#fff;padding:10px 14px;font-weight:600;list-style:none;\"\u003eIs R290 safe for a domestic installation?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px;background:#FFFFFF;\"\u003eYes. R290 is used across Europe in domestic heat pumps and refrigeration. The Aerona 290 is engineered around R290 safety with a \u003cstrong\u003erefrigerant leak sensor\u003c\/strong\u003e and \u003cstrong\u003eindependent ventilation channels\u003c\/strong\u003e. The refrigerant is sealed inside the outdoor unit, which sits outside the property. UK installation rules govern minimum siting clearances to ensure safety; a competent designer will ensure these are met.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #E5E7EB;border-radius:4px;margin:8px 0;overflow:hidden;\"\u003e\u003csummary style=\"cursor:pointer;background:#008377CF;color:#fff;padding:10px 14px;font-weight:600;list-style:none;\"\u003eWhy can't I use glycol antifreeze?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px;background:#FFFFFF;\"\u003eGrant's Aerona 290 installation manual specifically \u003cstrong\u003edoes not permit glycol in the primary circuit\u003c\/strong\u003e. Use mechanical anti-freeze valves on flow and return instead. The unit itself has a plate heat exchanger anti-freeze heater and a heated base tray; external pipework relies on mechanical valve protection.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #E5E7EB;border-radius:4px;margin:8px 0;overflow:hidden;\"\u003e\u003csummary style=\"cursor:pointer;background:#008377CF;color:#fff;padding:10px 14px;font-weight:600;list-style:none;\"\u003eWill my existing radiators work?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px;background:#FFFFFF;\"\u003eIn most retrofit cases, yes — R290's higher flow temperature envelope covers typical UK radiator sizing. A heat loss survey identifies any coldest-rooms exceptions before commissioning.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #E5E7EB;border-radius:4px;margin:8px 0;overflow:hidden;\"\u003e\u003csummary style=\"cursor:pointer;background:#008377CF;color:#fff;padding:10px 14px;font-weight:600;list-style:none;\"\u003eDo I need to be MCS-registered to install this?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px;background:#FFFFFF;\"\u003eThe unit can be installed by any competent heating engineer, but to claim the \u003cstrong\u003eBoiler Upgrade Scheme grant\u003c\/strong\u003e the install must be by an MCS-certified installer, and to unlock the 7-year guarantee the installer must additionally hold Grant G1 accreditation. Quality Heating can connect you with MCS + G1 installers.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #E5E7EB;border-radius:4px;margin:8px 0;overflow:hidden;\"\u003e\u003csummary style=\"cursor:pointer;background:#008377CF;color:#fff;padding:10px 14px;font-weight:600;list-style:none;\"\u003eDo I need a separate controller?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px;background:#FFFFFF;\"\u003eYes — the Aerona 290 requires the \u003cstrong\u003eGrant Aerona Smart Controller\u003c\/strong\u003e (sold separately, in either Standard or PP-cylinder variant). Add the Aerona Smart WiFi Hub for app-based remote access.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Grant","offers":[{"title":"4kW","offer_id":65262116929885,"sku":"HPR2904","price":3290.0,"currency_code":"GBP","in_stock":true},{"title":"6.5kW","offer_id":65262116962653,"sku":"HPR29065","price":3430.0,"currency_code":"GBP","in_stock":true},{"title":"9kW","offer_id":65262116995421,"sku":"HPR2909","price":3830.0,"currency_code":"GBP","in_stock":true},{"title":"12kW","offer_id":65262117028189,"sku":"HPR29012","price":4500.0,"currency_code":"GBP","in_stock":true},{"title":"15.5kW","offer_id":65262117060957,"sku":"HPR290155","price":5300.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/Grant-Aerona-290-4kW-Air-Source-Heat-Pump-HPR2904.jpg?v=1784135120","url":"https:\/\/qualityheating.co.uk\/products\/grant-aerona-290-r290-monobloc-air-source-heat-pump-4-6-5-9-12-15-5kw-variants","provider":"AIZO Quality Heating","version":"1.0","type":"link"}