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 4.7 stars

1,265 reviews

 4.7 stars

1,265 reviews

Mistral Sealed System Non-Condensing S1 20kW Oil Boiler

Mistral Sealed System Non-Condensing S1 20kW Oil Boiler Boiler
Typical Price (inc VAT)
£1,320
Typical installation Cost (inc VAT)*
£1000 - £1500
Sundries (Filter, Flue, etc)
£300
Total Cost
£2,620 - £3,120

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Make Mistral
Model Sealed System Non-Condensing S1 20kW Oil Boiler
Is Condensing Non-Condensing
Efficiency Rating 87%
Band Rating B Rated
LPG Compatible No
Standard Warranty 2 yr. parts - 5 yr. heat exch
Central Heating Max. Output 20kW
Mounting Floor Standing
Flow Rate N/A
Typical Price (inc VAT) £1,320
Typical installation Cost (inc VAT)* £1000 - £1500
Sundries (Filter, Flue, etc) £300
Total Cost £2,620 - £3,120
ERP Rating B Heat

* This is a guide price for a straightforward, like-for-like boiler replacement. Installation costs will vary dependent on work required.

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Product Description

The Sealed System S1 is a non-condensing, floor-standing oil boiler designed and manufactured by Mistral. Boasting a 93% efficiency and A rating, this is a highly efficient unit that could help to lower your energy bills.

This is a compact unit, measuring just 410mm wide, which means that it can nicely hidden away under a standard work surface. The output rating of 20kW makes it perfect for smaller homes that don’t have such a high demand for heating and hot water. Other outputs are available in the range, from 14kW up to 40kW, which means there’s a boiler to suit the demands of just about any home. You can also choose whether to have a condensing or non-condensing unit and whether you’d like it installed indoors or outdoors.

The S1 features a 12 litre expansion vessel, safety valve, pressure gauge, automatic air vent, high-quality white casing, a multi-directional flue outlet, pre-punched pipe entry points on both the side and back which allows for an easy and quick installation that can save you money. This unit also has a 2 or 4 port option, front servicing, conventional or balanced flue and can be used in tandem operations. All of these features make for a highly reliable unit that’s not going to let you down.

As this is a System boiler, it sends hot water to the radiators and a sealed hot water storage cylinder. The important parts of the system are built into the boiler which makes it more compact and easier to service.

Featuring a 5-year warranty, you’ll have the peace of mind that you’ll be well covered by the manufacturer long after installation.

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Excellent 4.7 out of 5

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