What Size Bunded Oil Tank Do I Need? A Complete UK Buyer’s Guide
Choosing the correct bunded oil tank size is essential for reliable heating, cost control, and regulatory compliance. Select a tank that’s too small and you’ll face frequent refills and higher delivery costs. Choose one that’s too large and you may waste space and money unnecessarily.
Whether you’re heating a home, small business, or commercial property, this guide explains how to choose the right size bunded oil tank, what factors affect oil usage, and how to future-proof your installation.
For expert advice, competitive pricing, and nationwide delivery, visit OTP Energy.
Why Choosing the Right Oil Tank Size Matters
Your oil tank size directly affects:
Heating reliability during winter
How often you need oil deliveries
Installation costs and space requirements
Long-term heating efficiency and budgeting
Modern bunded oil tanks are now the preferred option across the UK due to their added environmental protection and compliance benefits.
Key Factors That Determine What Size Oil Tank You Need
Domestic vs Commercial Use
Most domestic properties require oil tanks between 1,000 and 1,500 litres, which is usually enough to supply heating and hot water for 6–12 months.
Commercial or agricultural users often need significantly larger tanks—2,500 litres to 5,000+ litres—depending on usage levels and delivery access.
Average Annual Heating Oil Usage
As a rough guide:
Small households: 800–1,200 litres per year
Medium households: 1,200–1,800 litres per year
Large homes or commercial premises: 2,000 litres or more
This detailed breakdown of what size oil tank you need helps match tank capacity to typical household consumption patterns.
Available Space & Installation Location
Bunded oil tanks are larger than single-skin tanks due to their secondary containment layer. You’ll need to consider:
Garden or yard space
Distance from buildings and boundaries
Access for oil deliveries
Your tank must also comply with UK oil storage regulations, which often influence minimum distances and placement.
Oil Delivery Frequency & Cost Control
Larger tanks allow you to:
Buy oil in bulk when prices are lower
Reduce emergency top-up deliveries
Improve winter heating reliability
This guide to domestic heating oil tank sizes explains how delivery patterns and usage impact the best tank size for your property.
Common Bunded Oil Tank Sizes (UK)
| Tank Size | Best For |
|---|---|
| 1,000 litres | Small homes, low usage |
| 1,200–1,500 litres | Average households |
| 2,000–2,500 litres | Large homes or shared supply |
| 3,500–5,000+ litres | Commercial or agricultural use |
Should You Upsize or Downsize Your Oil Tank?
When Upsizing Makes Sense
Property extensions or renovations
Switching to oil from another heating source
Wanting fewer deliveries and better price control
When Downsizing Is Better
Limited space
Lower heating demand
Budget constraints
Choosing the right size now can save significant money over the lifespan of your tank.
Buying a Bunded Oil Tank & Heating Oil from OTP Energy
OTP Energy supplies quality heating oil and expert guidance to help you choose the right setup for your property. You can explore available products and services through the OTP Energy shop.
Whether you’re installing a new tank or reviewing your current setup, our team can help you make a cost-effective, compliant decision.
Conclusion: Choose the Right Size Bunded Oil Tank with Confidence
Selecting the correct bunded oil tank size ensures efficient heating, fewer disruptions, and better cost management throughout the year. By understanding your usage, space, and delivery needs, you can avoid common mistakes and future-proof your heating system.
For trusted advice, competitive prices, and reliable heating oil supply, choose OTP Energy—your partner in efficient, dependable oil heating.
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