Triangle Tube introduces the Instinct. The Instinct is offered in combi and solo models. Combi sizes are available in 155 and 199. Solo sizes are available in 110, 155 and 199, and can be cascaded up to six boilers. The Instinct is engineered and manufactured with reliability in mind and completes a state-of-the-art reliability validation, which includes environmental testing of sub-assemblies, stress testing and simulated testing of appliances, the company says. The Instinct is built in the same unit that develops these techniques for Ideal Boilers, a leading boiler manufacturer in the UK, which produces over 400,000 units per year and meets the highest of standards.