Grant Vortex Outdoor Diesel Condensing Boiler 26kw
Grant
Keep your home consistently warm through the coldest Kiwi winters with the Grant Vortex Outdoor Diesel Condensing Boiler 26kw. Engineered for exceptional thermal efficiency and built to withstand the toughest New Zealand weather conditions, this premium outdoor boiler is the ultimate choice for homeowners upgrading to hydronic central heating, as well as trade professionals demanding industry-leading reliability.
Designed and manufactured in Ireland to meet the highest performance standards, this floor-standing outdoor diesel boiler frees up valuable indoor living space. Featuring a smart dual set point system, it seamlessly manages your whole-home radiator or underfloor central heating while simultaneously powering an indirect domestic hot water system. With its high-efficiency three-pass cast iron heat exchanger, it delivers maximum heat output with remarkably low fuel consumption, making it one of the most cost-effective and energy-efficient heating solutions on the NZ market.
Key Features & Technical Specifications:
- Heating Output Capacity: Adjustable from 15.0kW to 26.0kW, making it ideal for medium-to-large New Zealand homes.
- Dual Set Point Technology: Versatile operation configured for central heating and/or an indirect domestic hot water system.
- Premium Burner Componentry: Features a highly reliable, industry-standard internal Riello RDB blown diesel burner.
- Heavy-Duty Heat Exchanger: High-efficiency, three-pass cast iron sections designed for long-lasting durability.
- Built-In System Protection: Equipped with an automatic air vent valve, high-performance circulating pump, expansion tank, and safety valve.
- Compact Footprint: 860mm (High) x 470mm (Wide) x 603mm (Deep) for unobtrusive outdoor positioning.
- Country of Origin: Proudly made in Ireland.
- Industry-Leading Warranty: Backed by a comprehensive 5-YEAR parts and labour guarantee.
*Please note: The base unit price excludes the required installation kit and flue components.
Why Choose Pratts for Your Central Heating Project?
Every home heating layout is unique, and getting the design right is crucial for trade quality performance and long-term efficiency. Because successful system integration depends on your specific property requirements, this unit is priced on application (POA). At Pratts, we provide expert site-visit inspections and custom design advice to ensure your system complies with all local NZ standards and delivers absolute comfort.
Whether you are a trade specialist sourcing a reliable boiler for a client, or a homeowner planning a premium heating upgrade, our team of experts is ready to assist. Contact Pratts today to request a quote or to schedule your professional site inspection.

