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Grant Vortex Eco Utility 15-21 review

£1,107.00 Typical price

Brand score %

Key features
  • Oil
  • Heat-only or regular

As the name suggests, the Grant Vortex Eco Utility 15-21 condensing oil boiler is primarily designed for use in a utility room, and comes with a simple white casing and basic controls. Although this is a 'heat-only, open-vent' boiler, it can be fitted with an optional sealed system kit and converted into a system boiler, making it suitable for a wider range of properties. Read our full review to find out whether the Grant Vortex Eco Utility 15-21is the best boiler for your home.

Included in our expert review
  • Pros and cons
  • Heating engineer views
  • What type of home is this boiler suitable for?
  • Will this boiler produce enough hot water for my home?
  • How efficient is this boiler?
  • What controls does this boiler have?
  • Is this boiler smart compatible?
  • What is the warranty with this boiler?
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Technical specifications

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Brand scores

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

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Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.

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