10 Year guarantee^*

Vortex Blue: External

Grant VortexBlue Blue Flame boilers incorporate the very latest low NOx Riello oil burner technology.

This means that the Grant VortexBlue boilers not only meet current NOx emissions targets but are future proofed against any future stringent low NOx emissions targets.

a Heating

Features & benefits

The Grant VortexBlue external modules have some of the highest oil-fired boiler efficiencies available today. These models are ideal for situations where a white cased kitchen/utility version is not always the best solution, possible due to limited space within the home.

All modules include a factory fitted multi-directional flue, high quality external powder coated casing, built in frost protection, mains isolating switch and a test switch. Just as other VortexBlue boilers, this range also incorporates Riello‘s RDB Blu burner technology teamed with our patented Vortex stainless steel heat exchanger.

Sealed System Kits

Grant VortexBlue external modules can be converted to sealed system operation by purchasing a pre-assembled kit from Grant UK. This includes an expansion vessel (size varies), automatic air vent, pressure relief valve and circulating pump. A filling loop and pressure gauge are also supplied as part of the kit. These can be fitted within the module casing, or ideally in a convenient site within the building, located between the cold main and central heating return.

Compliant with September 2018 low NOx legislation
Outputs of 15-21, 21-26 and 26-36kW
90.7- 93.3% Gross SAP2009 annual efficiency
10 year guarantee when installed by a G1 accredited installer (T&C’s apply)
Market-leading Riello Blue Flame burner
Factory-fitted multi-directional flue
High quality, external powder-coated casing
Built-in frost protection
Main isolating switch and a test switch

Blue Flame Technology

Grant and Riello’s R&D have together successfully matched and field trialled this new range of innovative appliances.

As the name suggests, the flame produced is blue in colour, rather than the usual yellow colour of the standard burners fitted in our current Grant Vortex range, which results in a much cleaner combustion process. All of the Grant VortexBlue boilers operate at the very high efficiency levels expected of the Grant Vortex condensing range and have the added benefit of producing extremely low NOx emissions.

In 2018, oil fired boilers installed in the UK will have to meet lower NOx emission targets. Furthermore, it is likely that even more stringent emission levels will be set in future years, so Grant have taken the decision to try and future proof oil fired appliances by moving to very low NOx, Blue Flame technology today.

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Configure your flue

We have a wide range of options available when it comes to flue systems, here's a helpful hand to put the right flue with the right boiler.

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Specification

Product code	Model	Set Output	Max Output	Weight	Height	Width	Depth	Efficiency	NOx Emissions	Tappings Flow/Return	Burner	Energy Rating	Load Profile	Energy Label	Product Fiche
VTXBFOM21	Grant VortexBlue External 21 (15-21kW)	21kW	21kW	143.0kg	908mm	505mm	1005mm	90.81	class 3	22mm	Riello RDB Blu	a Heating	-	View	View
VTXBFOM26	Grant VortexBlue External 26 (21-26kW)	26kW	26kW	143.0kg	908mm	505mm	1005mm	91.71	TBC	22mm	Riello RDB Blu	a Heating	-	View	View
VTXBFOM36	Grant VortexBlue External 36 (26-36kW)	36kW	36kW	162kg	908mm	505mm	1005mm	94.56	Class 3	28mm	Riello RDB Blu	a Heating	-	View	View