Bosch Compress 5800i AW 4kW Outdoor Air Source Heat Pump
The Bosch Compress 5800i AW 4kW is a compact air-to-water, outdoor monobloc heating and hot water heat pump. Optimised for UK climates and best suited to insulated modern homes, new builds, and low heat loss properties, it has the ability to provide precision low temperature heating for our homes here in the UK.
The system captures the natural energy of ambient air (in temperatures as low as −22°C), and extracts it into a factory sealed outdoor unit, using the ultra-low GWP R290 natural refrigerant to deliver it directly to your home's central heating system.
Features and Benefits: Bosch Compress 5800i AW 4kW
Eco-Friendly Refrigerant: Using a natural refrigerant means they have virtually no global warming impact, without giving up its thermodynamic performance.
4kW Heating Capacity: Specifically designed for the UK climate, well-insulated homes, new builds and low-heat-loss retrofits to provide accurate, high efficiency space heating.
ErP A+++ Efficiency: At a 35°C flow rate, which represents a 180% seasonal space heating efficiency with it reaching A++ at a 55°C flow. Its part-load CoPs peak at 4.37 for A7/W35 conditions and climb to 5.41 when tested at A12/W35.
High Flow Temperatures: Flow temperatures can reach 75°C meaning the heat pump can provide high flow temperatures without needing a backup immersion heater. This simplifies domestic hot water and makes it easier to combine with radiators.
Quiet Operation: The sound-diffusing casing featured on the 5800i AW 4kW results in a low 40 dB(A) outdoor sound level (under standard test conditions), ideal for complying with Permitted Development Rights (PDR) that are close to boundary lines.
Monobloc Design: Keeps the factory sealed R290 refrigerant loop entirely contained within the outdoor unit and connected directly via standard water pipework without F-Gas installer qualification.
Cold-Weather Reliability: Keeps going in outdoor ambient temperatures down to -22°C to give reliable domestic heating through typical cold UK winters.
Outdoor Size: Only 800mm (H) x 1100mm (W) x 540mm (D) and weighing 110kg, it fits almost anywhere outside such as down the side of your house or discretely next to shrubs and bushes.
Grant Eligibility & Warranty: MCS certified installations give access to the up to £7,500 UK Boiler Upgrade Scheme and when fitted by an accredited installer, can benefit from an up to 7-year manufacturer warranty.
System Integration: Specifically designed for direct connection to wall-hung Bosch Compress 5800i AW indoor units or floor-standing All-in-One towers.
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