Oil boiler replacement in Argyll
Argyll covers Oban, Lochgilphead, Campbeltown, Dunoon and the islands of Mull, Islay and Jura. It has one of the highest proportions of off-gas homes in Scotland, with oil and LPG widespread.
Key facts
- Argyll has one of the highest proportions of off-gas homes in Scotland.
- The maritime climate is mild but very wet, affecting insulation and unit placement.
- Island properties need particular attention to delivery logistics.
- The electrical supply on islands may be single-phase only, limiting unit choice.
- Many Argyll properties are detached croft houses with good outdoor space.
Last updated: 28 October 2026
What types of housing are in Argyll?
Argyll has a mix of traditional stone-built croft houses, Victorian villas in towns like Oban, and newer build detached homes. The islands — Mull, Islay, Jura, Coll, Tiree — have predominantly traditional stone construction, often harled, with solid walls. Many rural properties are detached and isolated, accessed by single-track roads.
How many properties are off-gas in Argyll?
Almost all of Argyll outside Oban town centre is off-gas. Oil and LPG are the primary heating fuels, with some electric heating in newer properties. The islands are entirely off-gas and heavily reliant on oil deliveries by ferry, which makes a heat pump conversion particularly attractive — it removes the dependence on ferry-based fuel deliveries.
What insulation does a Argyll property need for a heat pump?
The wet maritime climate in Argyll means insulation must handle moisture correctly. Traditional stone walls need breathable insulation systems. Dampness is a common issue in older Argyll properties, and this must be addressed before a heat pump is fitted. Loft insulation should be checked for moisture ingress, particularly where roofs are aging.
Will my radiators need replacing in Argyll?
The mild climate means heat loads are generally lower than in the Highlands or the Angus glens. However, solid-walled properties still have significant heat loss. The room-by-room heat loss calculation is essential, and it should use Argyll-specific design temperatures, which are milder than the Scottish average.
How does the Argyll winter affect a heat pump?
Argyll winters are mild and very wet. Temperatures rarely drop far below freezing at sea level, but the combination of dampness and wind makes properties feel cold. The wind-driven rain on the west coast is a significant factor — it affects insulation performance and the outdoor unit must be positioned to avoid direct exposure to salt-laden westerly winds.
Which nearby areas do we also cover?
Argyll borders the Highlands to the north and Perthshire to the east. We cover properties throughout Argyll including the islands, though island properties may have longer lead times.
Get a quotation for your Argyll property
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Related guides
Costs & prices
What an oil to heat pump conversion costs and the six factors that drive the price.
Read moreHow it works
The five stages of replacing an oil boiler with a heat pump, from enquiry to handover.
Read moreAll areas covered
See all the Scottish regions we cover for oil to heat pump conversions.
Read moreLast updated: 28 October 2026. Reviewed by the Scottish Energy Efficiency team.