Replacing Oil Heating with a Heat Pump

If there is one scenario where a heat pump is almost always the right choice, it is replacing oil heating. Oil is expensive, the price swings wildly, and it produces more carbon than any other domestic heating fuel. A heat pump solves all three problems.

The Case Against Oil

Oil heating has served rural homes well for decades. But the economics have shifted. Here is where things stand:

• Oil is expensive. A typical three-bedroom house on oil spends £1,800–£2,400 per year on heating. That is significantly more than gas and much more than a heat pump.
• Oil prices are volatile. The price of heating oil can swing 30–40% in a single year. There is no price cap like there is for gas and electricity. You are at the mercy of global oil markets.
• Oil is carbon-intensive. Burning oil produces roughly 20% more CO2 per unit of heat than gas. It is the dirtiest common domestic heating fuel.
• Oil boilers need regular servicing. Annual services, nozzle replacements, tank inspections — it adds up. And when an oil boiler fails, parts can be expensive and slow to arrive.

The Savings: £800–£1,300 Per Year

Switching from oil to an air source heat pump typically saves £800–£1,300 per year on heating bills. Here is a direct comparison for a three-bedroom rural home:

System	Annual Heating Cost
Oil boiler	£1,800–£2,400
Air source heat pump	£800–£1,100
Annual saving	£800–£1,300

Over the 20+ year lifespan of a heat pump, that is £16,000–£26,000 in savings. Even without the grant, a heat pump pays for itself within 8–12 years when replacing oil. With the £7,500 grant, the payback period drops to 3–6 years.

Rural Properties Are Ideal

Most oil-heated homes are in rural areas — and rural properties are often ideal for heat pumps. You typically have:

• Plenty of outdoor space for the heat pump unit, with no close neighbours to worry about for noise.
• A detached property with good access all around.
• An existing system boiler with a hot water cylinder — which means less work during installation than switching from a combi boiler.

We install heat pumps across rural Dorset, Hampshire, and Wiltshire — areas with a lot of oil-heated homes. It is one of the most common conversions we carry out.

What Happens to the Oil Tank?

Once the heat pump is installed and your oil boiler is decommissioned, you no longer need the oil tank. We can arrange for the tank to be properly drained and removed as part of the project. This frees up space in your garden and removes the risk of oil leaks and contamination.

If the tank is underground, removal is more involved and may need a specialist contractor. We can advise on this during the survey.

No More Deliveries, No More Price Anxiety

One of the things our customers appreciate most about switching from oil is the simplicity. No more watching oil prices and trying to time your order. No more worrying about running out in February. No more tanker deliveries blocking your drive.

A heat pump runs on electricity. Your electricity bill is predictable, covered by a price cap, and you can fix your tariff if you want certainty. If you add solar panels, you can generate much of the electricity yourself.

Step by Step: What the Switch Involves

1. Free home survey. We visit your property, carry out heat loss calculations, assess your radiators, and check your eligibility for the BUS grant.
2. System design. We specify the right heat pump, cylinder, and any radiator upgrades needed.
3. Grant application. We apply for the £7,500 BUS grant through Ofgem. You get a confirmation email.
4. Installation. We remove the old oil boiler, install the heat pump and cylinder, modify pipework as needed, and upgrade any radiators. This typically takes 3–5 days.
5. Oil tank removal. We arrange for the oil tank to be drained and removed.
6. Handover. We commission the system, walk you through the controls, and make sure you are comfortable with how it all works.

Is There Any Reason Not to Switch?

Very few. If your oil boiler is brand new and working perfectly, you might want to run it for a few more years before switching — though even then, the running cost savings may justify an early change. If your home is extremely poorly insulated with no realistic prospect of improvement, a heat pump will still save you money compared to oil, but less than it would in a better-insulated home.

For the vast majority of oil-heated homes, the switch to a heat pump is straightforward, saves money from year one, and is one of the best investments you can make.