Newbourne 40i Inset Previous Next Published May 8, 2018 at 530 × 638 in Modern and Contemporary Stoves Newbourne 40i Inset The Newboure 40i Inset is designed to fit directly into a 16″ x 22″ British fireplace. Excellent nominal heat output of 4.9kW and 79% burn efficiency. Like this:Like Loading...