Beyond the headline electricity savings, here's what actually changes when you switch to a heat pump.
Written by the March Technology Technical Team · Last Updated: July 2026 · 5 min read
The most immediate benefit is cost — most properties see up to 70% lower electricity use for hot water compared to a direct electric immersion heater, which adds up significantly over a year of daily use. Unlike a solar-only system, that saving comes with no compromise on reliability, since a heat pump works consistently regardless of weather or time of day.
There's a genuine environmental angle too: lower electricity use for the same hot water output means a smaller carbon footprint, which increasingly matters for hotels and offices pursuing ESG or green building goals. And because a correctly maintained heat pump has a working lifespan of 8-15 years with relatively low running costs, it's increasingly seen as a feature that supports property value, not just a utility cost. For the technical explanation behind these numbers, see our how heat pumps work guide.
Typical savings: Up to 70% vs electric immersion heating
Environmental: Lower carbon footprint than direct electric heating
Reliability: Works regardless of weather, day or night
Property value: Efficient systems appeal to buyers and tenants
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Most properties see up to 70% lower electricity use for hot water compared to a direct electric immersion heater, though actual savings depend on your current usage patterns.
Yes — using significantly less electricity for the same hot water output means a smaller carbon footprint than direct electric heating.
Increasingly, yes — efficient, low-running-cost systems are seen as a genuine feature by buyers and tenants, similar to solar installations.
The main one is a higher upfront cost than a basic electric geyser, though this is typically recovered within 2-4 years through lower running costs.