Description
Ensure peak efficiency and longevity for your heat pump installation with the Grant HPIDVOL30EXT 30-Litre Volumiser Extension. Specifically designed to integrate seamlessly with Grant QR (Quick Recovery) unvented hot water cylinders, this 30L vessel increases system water volume to prevent compressor short-cycling, maintain minimum flow rates, and maximise renewable heating performance.
Keep Your Heat Pump Running at Peak Efficiency
Modern air-source heat pumps require a minimum volume of circulating system water to operate smoothly during defrost cycles and low-demand periods. The Grant HPIDVOL30EXT delivers an additional 30 litres of system capacity in a compact, space-saving format.
By preventing heat pump short-cycling (frequent turning on and off), this extension vessel reduces mechanical wear and tear on your heat pump compressor while lowering household energy consumption.
Seamless Cylinder Integration
Designed as part of Grant’s modular heating ecosystem, the HPIDVOL30EXT can be installed as an extension vessel sitting adjacent to or beneath compatible Grant cylinder units, or positioned within primary pipework loops as a dedicated low-loss header/volumiser vessel.
Key Features & Benefits
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Optimised System Capacity: Provides 30 litres of thermal storage/volumising capacity for heat pump hydronic circuits.
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Prevents Short-Cycling: Stabilises system flow rates and heating loops, protecting compressor life.
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Defrost Cycle Support: Holds sufficient thermal energy to execute smooth heat pump defrost cycles without cooling indoor living spaces.
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Premium Insulation: High-grade thermal insulation keeps standing heat loss to an absolute minimum.
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Durable Stainless Steel Construction: Built using high-quality materials to resist corrosion and handle system pressures up to 3 bar.
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Compact Footprint: Easily accommodates tight boiler rooms or airing cupboards.
