Provides both heating and hot water without the need for an additional hot water cylinder. Features Riello Low NOx burner technology. Increases hot water performance due to its low water content and larger surface area. Electric temperature controls allow the boiler to operate in condensing mode on central heating whilst maintaining instant water production.

Brand Name	Grant
Colour	Green
Max. Domestic Hot Water Output	21kW
Max. Central Heating Output	21kW
Stainless Steel Heat Exchanger	Yes
Side or Rear Flue Outlet	Yes
Compatible with Solar Panels	Yes
2 Year Manufacturer’s Guarantee	Yes
70,000BTU	Yes
Easy to Read LED Indicators	Yes
External Powder-Coated Casing & Built-in Frost Protection	Yes
Boiler Type	Combi
Flue Outlet Position	Side or Rear Flue Outlet
Energy Rating (Heating)	A
Energy Rating (Water)	B
Fuel Type	Oil
Model Name/No	Vortex Pro 21

Brand Name	Grant
Colour	None
Material	None
Manufacturer Model No	VTXOMCOMBI21
Wear Type	None
Type	Oil Combi Boiler
Certifications Met	None
Country of Origin	None
Protects From	None
Waterproof	None
Number of Pockets	None
Fuel Type	Oil
Boiler Type	Combi Boiler
Max Output	21 kW
ERP Rating	A
Nox Class	NOx Class 2