The average tank capacity for domestic heating oil typically ranges from 1100 litres to 1400 litres. However, larger domestic tanks can range from 2300-2500 litres. Most tanks should have a sticker or stamp indicating the tanks capacity.

Nowadays, around 90% of households have plastic oil tanks installed. Many of the more recent tanks are now “bunded” (double skinned).

There are several tank shapes in general – below are some images to indicate tank shape and estimated tank capacity.

Slim-line Tank
Slim-line tanks have an estimated capacity of 1100-1200 litres (around 250 gallons). These shapes of tanks are ideal for space-limited installations – saving you space and are specially designed to fit into smaller, more awkward spaces with its tall, narrow stature.

Dimensions are circa: L:2060mm W:660mm H:1400mm

Horizontal Tank
Horizontal tanks can come in two different sizes where capacity differs. The first size has an estimated capacity of around 1300-1400 litres (circa 300 gallons) and the bigger version has a estimated capacity of around 2300-2500 litres (circa 500-600 gallons). These tanks are a great way to maximize the storage of your fuel capacity. These tanks are typically used in residential homes, agricultural settings or commercial premises.
Dimensions are circa: L:1770mm W:1030mm H:1120mm

  • Vertical Tank
    Also known as the “Beehive Tank” which can come in two different sizes where capacity differs. The first size has a estimated capacity of around 1300-1400 litres (circa 300 gallons) and the bigger version has a estimated capacity of around 2300-2500 litres (circa 500-600 gallons). These type of tanks are ideal for properties that have space limitations whereby the tank has less length but more height.
    Dimensions are circa: Dimensions: H:1600mm, Diameter: 1250mm
  • Low Profile Tanks
    Low profile tanks are space-efficient and ideal for the customer who wishes to keep their tank out of sight. Low profile tanks have a reduced height and sit lower to the ground than other tanks. These tanks are ideal for residential premises or businesses. Dimensions are circa Dimensions: L:2000mm W:1400mm H:930mm

The main suppliers of tanks in the UK and Ireland are as follows:

Titan Tanks (owned by Kingspan)
Harlequin Tanks (Based in Northern Ireland)
Carberry Tanks (Based in Ireland)
Balmoral (Based in Scotland)
Tuffa Tanks
Atlantis Tanks

If you have any queries about your oil tank, please feel free to give us a call and we’ll be happy to help.