Gas Boiler From Heat Transfer

The electronic combustion control system on the Elite Plus residential heating boiler automatically adjusts to the type and quality of fuel being used, says the firm, ensuring a constant, optimum air-to-gas combustion mixture. The boiler features a 10-to-1 turndown ratio, allowing the 199,000-BTU/hour unit to modulate down to 19,900 BTU/hour. Other features include an extended venting range of 250 feet, compared to 85 feet of other models, flue-exhaust temperatures low enough to permit venting with Schedule 40 PVC or CPVC pipe, and an easy-to-use LCD screen. 800-323-9651. www.htproducts.com.