Weil-McLain’s GV90+ high-efficiency cast-iron boiler for energy-efficient comfort heating in residential applications features streamlined controls with simple setup, low maintenance and durable design for the long run, the company notes. The unit features a high-performance durable cast-iron primary heat exchanger made from about 70% recycled materials. A corrosion-resistant stainless-steel condensing secondary heat exchanger recoups heat energy from exhaust normally wasted to further system efficiency.

Weil-McLain. www.weil-mclain.com/products/gv90-gas-boiler