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Potterton Ultra Heat

The Potterton Ultra Heat is a gas condensing heat only boiler that can be installed almost anywhere in the home.

Ideal for properties with a traditional central heating system, Potterton’s Ultra Heat is a state of the art heat only boiler that requires a cold water tank and hot water storage cylinder. This compact appliance is available in outputs from 12kW to 24kW to suit most homes and can be installed in a kitchen cupboard, which is great news if you prefer to keep your boiler hidden away.

How Much Does this Boiler Cost?

Potterton Ultra Heat prices vary according to the heat output and typically range between £900 and £1,200 including VAT. There are five outputs to consider, including 12kW, 15kW, 18kW, 21kW and 24kW. You’ll also need to factor in the fitting cost. If you want to find the best price on both the boiler and installation, we suggest you take the time to shop around as there is a great deal of variation in prices.

How will I know if this Boiler is Suitable for My Home?

Like all heat only boilers, the Ultra Heat is perfect for homes with more than one bathroom and properties that use a lot of hot water at the same time. All heat only boilers need to link to a cold water tank and a cylinder that can store the hot water. The tank is usually situated in a loft and the cylinder is commonly placed in an airing cupboard. If you don’t have enough space to house these components, a heat only boiler may not be a good option for your home.

As the Potterton Ultra Heat comes in five different heat outputs, you must make sure you select the correct size (kW) of boiler for your home and needs. To be on the safe side, we suggest you seek advice from a Gas Safe registered engineer who will be able to help you pick the most suitable boiler model.

Is it a High Efficiency Boiler?

The Ultra Heat has an A efficiency rating, making it one of the most energy efficient and environmentally friendly boilers on the market. So, if you purchase this heat only boiler, you should save some money on your bills and reduce your carbon footprint. We know it meets strict efficiency criteria because it is endorsed by the Energy Saving Trust as well. To maximise performance and fuel savings for hot water, you can use this boiler with an optional Megaflo Eco Cylinder.

Does this Boiler have a Good Range of Controls and Features?

It does have some user controls, such as an operating mode selector switch with reset and an adjustable central heating temperature switch. There’s an LED display that shows you the temperature, boiler status and fault diagnosis. Potterton’s Ultra Heat is also compatible with some optional controls including room thermostats and twin channel wired programmers. The boiler does not need a pump overrun or permanent live, which helps to save time and money on fitting. It comes with a choice of flue lengths to make siting flexible and a one metre lead for ease of installation. Even servicing this boiler is easier and quicker because it has front and side access to all of the components.

How long is the Warranty on this Boiler?

The Potterton Ultra Heat comes with a 2-year parts and labour warranty as standard, provided you register the boiler within 30 days of installation and have it serviced every year.

Potterton Ultra Heat Sizes and Prices


ModelTypeDimensionsMaximum Flow RateOutputEfficiency RatingTypical Price
Ultra Heat 12Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A12 kWA 90% and above£900
Ultra Heat 15Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A15 kWA 90% and above£980
Ultra Heat 18Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A18 kWA 90% and above£1060
Ultra Heat 21Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A21 kWA 90% and above£1140
Ultra Heat 24Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A24 kWA 90% and above£1200

Summary of Important Information

  • Priced between £900 and £1,200
  • Heating output of 12kW, 15kW, 18kW, 21kW or 24kW.
  • Dimensions of 625mm (H) x 370mm (W) x 270mm (D)
  • Uses gas as its fuel source
  • A-rated for efficiency
  • Solar compatible
  • 2-year warranty as standard

Pros and Cons

We can’t find any major negatives but we think the warranty should be longer, especially since Potterton boilers have an average Which? reliability rating and customer score. Below, you can find all the pros and cons of the Ultra Heat.

  • Fits in a standard kitchen cupboard
  • Suited to small, medium and large-sized homes
  • No pump overrun or permanent live required – saves time and money on installation
  • Multiple flue length options – flexible siting possibilities
  • One metre lead and easy fit wall-mounting bracket – easy to install
  • Front and side access to all components – easy to repair and service
  • NOx Class 5 boiler – kinder to the environment
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions
  • Compatible with Megaflo Eco Cylinders – increases energy efficiency and improves comfort levels and hot water performance


  • Potterton boilers have an overall Which? score of 54%
  • Requires separate cylinder and loft tanks
  • User controls are basic
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