LPG Boilers UK: What Are They & Are They Worth It? 2026
LPG (liquefied petroleum gas) boilers are a common heating option for UK homes without mains gas. They work similarly to natural gas boilers but use LPG supplied from a tank or cylinders. This guide explains how LPG boilers work, what affects running costs in 2026, installation considerations, and alternatives like heat pumps.
How LPG Boilers Work
LPG boilers heat water for radiators and hot water, using combustion like natural gas boilers. You’ll need an LPG supply setup (tank or cylinders), safe siting, and regular servicing by a qualified engineer.
Running Costs: What Matters
- LPG price and supplier contract terms
- Home heat demand (insulation and set temperatures)
- Boiler efficiency and controls
- Tank rental/delivery logistics
Pros and Cons
- Pros: familiar wet heating, good heat output, workable in off-gas areas.
- Cons: fuel price volatility, tank siting, delivery dependence, and emissions considerations.
Alternatives
Alternatives may include heat pumps (often with insulation upgrades), oil in some regions, or improving insulation and controls to reduce demand before changing heating type.
Start With the Right kW Output
Correct sizing matters whether you’re using LPG, oil, or switching to a heat pump. Use our calculator to estimate the kW range your home needs.
Use the Boiler Size CalculatorFrequently Asked Questions
Is LPG cheaper than electricity for heating?
It depends on tariffs and fuel prices. For higher heat-demand homes, LPG can be cheaper than direct electric heating, but costs vary.
Do LPG boilers need a flue?
Yes. LPG boilers are combustion appliances and need safe flueing and ventilation as required.
Is an LPG boiler different from a gas boiler?
They’re similar, but the boiler must be compatible with LPG and correctly set up for that fuel by a qualified engineer.
Is switching to a heat pump worth it from LPG?
It can be, especially if you improve insulation and can run lower temperatures. A heat loss assessment and system design are key.
What’s the biggest thing to get right?
Correct sizing and good controls, plus a reliable fuel supply arrangement and safe installation.