Oil Heat Only Boilers

Keep off-grid heating systems running reliably with our range of oil heat only boilers. Designed for use with separate hot water cylinders and cold water tanks, these boilers are a solid choice for traditional setups in rural homes and older properties. Each heat-only oil boiler is built for long-term use, easy maintenance and dependable performance. Whether you’re replacing an existing unit or fitting a full system, we’ve got oil heat only boilers ready for the job. 

Q: What is a heat only oil boiler and how does it work?

A: A heat only oil boiler (also called a regular or conventional oil boiler) heats water that’s stored in a separate hot water cylinder, ready for use in your radiators, taps and showers. It works with a cold water tank (usually in the loft), making it ideal for larger homes with traditional plumbing systems or where multiple bathrooms are in use at the same time.

Q: What’s the difference between an oil heat only boiler and a combi boiler?

A: A heat only oil boiler stores hot water in a cylinder and requires a cold water tank, while an oil combi boiler heats water on demand without storage. If you’ve got high hot water demand across multiple taps or prefer using a cylinder, a heat only system is a solid choice. If you want to save space and simplify your setup, a combi boiler might be better.

Q: Are heat only oil boilers any good?

A: They’re ideal for larger homes or traditional heating systems. Many properties still use a regular setup with a hot water cylinder, and a heat only oil boiler is a reliable option that’s simple to service and works well with older pipework or vented systems. They’re also a smart replacement if you’re upgrading an old oil boiler without changing the plumbing.

Q: Do you stock external heat only oil boilers?

A: We stock external oil heat only boilers, built into durable weatherproof casings for outdoor installation. They’re a great option if you're short on internal space or want to reduce boiler noise indoors. Always ensure they’re installed by an OFTEC-registered engineer.

Q: Can I install a heat only oil boiler myself?

A: No - oil boilers, including heat only models, must be installed by a qualified professional. In the UK, that’s an OFTEC-registered engineer, who can ensure the installation is compliant with current safety and efficiency regulations.

Q: Can I order a heat only oil boiler online?

A: Yes - you can order heat only oil boilers online with UK delivery or collection available. We stock high-quality options from trusted brands, including external models. If you're unsure which type or size you need, visit your local branch and speak to our team.