System Boilers

Shop high-performance system boilers at Toolstation, with products available from trusted brands like Ideal Boilers, Viessmann, Vaillant and Vokera. We stock system boilers in various sizes, configurations and kilowatt ratings to suit any home or workplace.

What Are the Benefits of a System Boiler?

System boilers are ideal for larger homes with higher demand for hot water. Unlike regular boilers and combi boilers that heat hot water as required, a system boiler benefits from a constant supply of hot water stored in a cylinder. However, the hot water supply runs out faster when multiple radiators, taps or showers are used, and it can take 30-40 minutes for a system boiler to heat more water. Overall, system boilers are reliable, efficient, and compatible with most central heating systems. Shop our full range of system boilers here, or check out our Boiler Buying Guide for more advice on how to find the right one for you.
Vaillant Vaillant Vaillant / Vaillant ecoTEC Plus 635 System Boiler 35kW

£2213.31

ex. VAT £1844.42 Each

Glowworm Glowworm Glowworm / Glowworm Energy System Boiler 18kW

£1277.59

ex. VAT £1064.66 Each

Ideal Boilers Ideal Boilers / Ideal Vogue Max System Boiler 32kW

£2004.99

ex. VAT £1670.82 Each

Vokera Vokera Vokera / Vokera Unica MAX System Boiler 30kW

£1099.99

ex. VAT £916.66 Each

Glowworm Glowworm Glowworm / Glow-worm Energy System Boiler 25kW

£1343.52

ex. VAT £1119.60 Each

Ideal Boilers Ideal Boilers / Ideal Logic Max System 2 Boiler 30kW

£1796.99

ex. VAT £1497.49 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 4000 System LPG Boiler 24kW

£1725.09

ex. VAT £1437.57 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch EasyControl CT 200 Black

£204.48

ex. VAT £170.40 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 4000 System LPG Boiler 21kW

£1679.55

ex. VAT £1399.62 Each

Vaillant Vaillant Vaillant / Vaillant ecoTEC Plus 615 System Boiler 15kW

£1465.43

ex. VAT £1221.19 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 4000 System LPG Boiler 12kW

£1444.13

ex. VAT £1203.44 Each

Ideal Boilers Ideal Boilers / Ideal Logic Max System 2 Boiler 24kW

£1807.49

ex. VAT £1506.24 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 4000 System Boiler 18kW

£1494.23

ex. VAT £1245.19 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 4000 System Boiler 15kW

£1428.20

ex. VAT £1190.17 Each

Vokera Vokera Vokera / Vokera Unica MAX System Boiler 20kW
Save £112
( 1 )

£1016.49 was £1129.18

ex. VAT £847.07 Each

Vaillant Vaillant Vaillant / Vaillant ecoTEC Plus 620 System Boiler 20kW

£1624.81

ex. VAT £1354.01 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 4000 System LPG Boiler 15kW

£1521.53

ex. VAT £1267.94 Each

Ideal Boilers Ideal Boilers / Ideal Vogue Max System Boiler 26kW

£1900.99

ex. VAT £1584.16 Each

Glowworm Glowworm Glowworm / Glowworm Energy System Boiler 30kW

£1420.89

ex. VAT £1184.07 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 4000 System Boiler 24kW

£1639.76

ex. VAT £1366.47 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 4000 System Boiler 21kW

£1589.77

ex. VAT £1324.81 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 4000 System Boiler 12kW

£1362.31

ex. VAT £1135.26 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 8000+ System Boiler 30kW

£1888.85

ex. VAT £1574.04 Each

Worcester Bosch Worcester Bosch Worcester Bosch / Worcester Bosch Greenstar 4000 System LPG Boiler 18kW

£1591.93

ex. VAT £1326.61 Each