Heat Pump Installation
in Hertfordshire

You don't — but your installer does. Only MCS certified engineers can install heat pumps that qualify for the £7,500 BUS grant. C A Waters is MCS certified, so our customers automatically qualify.

Most Hertfordshire homes built or refurbished after 2000 are suitable. Key factors are insulation levels, radiator sizing, and available outdoor space. We assess all of this at the free survey and will tell you honestly if a heat pump isn't right for your property.

Before the £7,500 BUS grant, installed costs range from £10,000 to £18,000. After the grant, the net cost is typically £2,500–£10,500 depending on property size and whether any radiator upgrades are needed.

Often yes. Heat pumps run at lower flow temperatures (45–55°C vs 70–80°C for gas boilers), so radiators need to be large enough to emit the same heat at that lower temperature. We calculate this at the survey — and if radiators need upsizing, we factor the cost into the quote.

Most installations take 2–3 days. This includes removing the old boiler, installing the outdoor unit, hot water cylinder, controls and pipework, then commissioning and testing.

Modern units run at 45–50dB at 1 metre — similar to a quiet conversation or a running fridge. Significantly quieter than units from 5–10 years ago. We site the outdoor unit carefully to minimise any impact on neighbours.

In most cases, no. Air source heat pumps fall under Permitted Development rights. Exceptions include listed buildings, some conservation areas, and front-wall installations facing a highway. We advise at survey stage.

For a full system replacement, we decommission, disconnect and remove your gas boiler. Gas supply is capped in coordination with your gas supplier. Some customers retain the boiler as a backup — we advise on this at survey.

Yes — and it works very well. Heat pumps run on electricity, so generating your own solar electricity reduces running costs significantly. We can advise on compatibility and introduce you to trusted solar installers.

SCOP (Seasonal Coefficient of Performance) is the average efficiency of the heat pump over a full heating season. An SCOP of 3.5 means 3.5 units of heat produced per unit of electricity consumed. Modern units achieve SCOP 3.5–4.5 in UK conditions — higher SCOP means lower running costs.

Yes. Air source heat pumps provide both central heating and domestic hot water via a dedicated cylinder, storing water at 55–60°C. This fully replaces your gas boiler.

Annual servicing is recommended (typically £120–£180) covering filter cleaning, refrigerant level check, electrical inspection and performance test. No annual gas safety certificate is required. Maintenance costs are lower than a gas boiler.