We install gas combi boilers, gas system boilers and regular gas boilers by both these manufacturers. For most customers, we recommend combi boilers or system boilers. Here is a quick comparative guide to the gas boilers we regularly install in these categories (model list accurate 2018 but may evolve as the manufacturers revise their lines over time – we’ll update this page from time to time accordingly):
Worcester Bosch gas combi boilers
Worcester Bosch gas combi boilers are designed to be used without a water cylinder, providing instant hot water on demand.
The Worcester Greenstar i is an A-rated gas combi boiler ideally suited to small-to-medium-sized homes with one bathroom. It has a high power output capacity of 24 kW, and was awarded a Best Buy by Which? magazine in the Gas Boilers category in September 2017. Two models are available, with flow rates of 9 and 10.8 litres per minute respectively.
The Worcester Greenstar Si Compact is a compact A-rated gas combi boiler that is similar to the Greenstar i but smaller, being designed to fit in a kitchen cupboard. It has a high output capacity of 24 kW, and also received a Best Buy award from Which? Magazine in September 2017. Two variant models are available, with hot water flow rates of 8.9 and 10.7 litres per minute.
The Worcester Greenstar CDi Classic is an A-rated wall-mounted gas combi boiler with a very high power output capacity of 30 kW, making it suitable for medium-to-large homes with up to two bathrooms. It has built-in frost protection, and comes in a choice of four variants with hot water flow rates varying from 11 to 15 litres per minute.
The Worcester Greenstar CDi Compact is a compact A-rated gas combi boiler with a high output capacity of 24 kW and built-in frost protection. It fits in a normal kitchen cupboard. Three variant models are available, with hot water flow rates of 10, 11.5 and 12.9 litres per minute respectively.
The Worcester Greenstar CDi Highflow is a floor-standing gas combi boiler with a very high power output capacity of 30 kW, suited to large homes with two bathrooms. Frost protection is built in, and it is A-rated for heat efficiency. As the name suggests, it is especially well-suited to the needs of homes that demand a very high hot water flow rate, since the two models available achieve 20 and a range-topping 25 litres per minute respectively
Vaillant gas combi boilers
The Vaillant ecoTEC exclusive with Green iQ combi is a range of two A-rated gas combi boilers with very high power outputs of 35 kW and 43 kW respectively, and high maximum flow rates of 14.5 and 17.8 litres per minute respectively. Both models are SEDBUK-rated with an efficiency of over 89.5%. They are 85% recyclable, and are compatible with Vaillant’s vSMART control app, allowing control of your boiler from a smartphone or tablet.
The Vaillant ecoTEC plus combi is a range of four A-rated gas combi boilers with high to very high power outputs of 25kW, 32kW, 35kW and 38kW respectively. All models are SEDBUK-rated with an efficiency of over 89.2%. They are compatible with Vaillant’s vSMART control app. Flow rates vary between 10.5 and 15.9 litres per minute depending on the model.
The Vaillant ecoTEC plus combination store is an A-rated gas combi boiler with a very high output of 38 kW. It is SEDBUK-rated with an efficiency of over 89.2%, and has a very high flow rate of up to 20 litres of water per minute, making it well-suited to large homes and families. It is compatible with Vaillant’s vSMART control app.
The Vaillant ecoTEC pro combi is a range of three A-rated gas combi boilers with high outputs of 24 kW, 28 kW and 30 kW respectively. The different models have flow rates of 9.6, 11.1 and 12.3 litres respectively, making them well-suited to small-to-medium-sized homes. They are compatible with Vaillant’s vSMART control app.
The Vaillant ecoFIT pure combi is a range of three compact A-rated gas combi boilers with high power outputs of 25 kW, 30 kW and 35 kW respectively. All models are small enough to be placed in a kitchen cupboard, and have a SEDBUK-rated efficiency of at least 89%. Flow rates vary from 10.4 to 14.4 litres per minute. They are all compatible with Vaillant’s vSMART control app.
Worcester Bosch gas system boilers
Worcester Bosch system boilers are designed to be used in combination with water cylinders, and can also beneficially be connected to renewable energy generation systems such as Worcester Greenskies solar panels.
The Worcester Greenstar i System 9 kW to 24 kW is a range of six A-rated gas system boilers with built-in frost protection. The six models are differentiated by their power output, ranging from 9 kW to 24 kW, so the range is suitable for properties of all sizes from small apartments to medium-sized houses. All models have built-in frost protection.
The Worcester Greenstar i System 27 kW and 30 kW are very high-output compact A-rated gas system boilers that will fit in a standard-sized kitchen cupboard and yet are suited to the hot water generation needs of medium-large and large homes.
The Worcester Greenstar CDi Classic System is a very high-output wall-mounted A-rated gas system boiler with built-in frost protection. The power output of 30 kW makes it well suited to large homes with a high demand for hot water and heating.
Vaillant gas system boilers
Vaillant gas system boilers give a constant supply of hot water and are well-suited to homes with more than one bathroom.
The Vaillant ecoTEC exclusive with Green iQ system is an A-rated gas system boiler with a high power output of 27 kW and a SEDBUK efficiency rating over 89.5%. It is compatible with Vaillant’s vSMART control app for controllability direct from your smartphone or tablet, and is 85% recyclable.
The Vaillant ecoTEC plus system is a range of six A-rated gas system boilers, with power outputs of 12 kW, 15 kW, 18 kW, 24 kW, 30 kW and 37 kW respectively. All models have a SEDBUK efficiency rating of at least 89%, and are compatible with Vaillant’s vSMART control app.
The Vaillant ecoFIT pure system is a range of five compact A-rated gas system boilers, all models being small enough to fit in a cupboard. Power outputs of 12 kW, 15 kW, 19 kW, 25kW and 30 kW are available. Al models are compatible with Vaillant’s vSMART control app.
Which gas boiler do I need?
Think you might know which gas boiler you need? Or are you not sure and need some professional advice? Either way, Gregor is happy to help! Call one of our customer service advisors today on 0117 935 2400 or 01225 738 397 for some sound advice and to book a free survey and no-obligation quotation anywhere in the greater Bath and Bristol region.