Weil Mclain Ultra 310 Series 2 Manual -

Includes outdoor reset and domestic hot water (DHW) priority as standard features, optimizing water temperature based on outside conditions. Navigating the U-Control Module

Boasts an AFUE (Annual Fuel Utilization Efficiency) of over 92% , reaching up to 98% in low-temperature applications like radiant in-floor heating. Weil Mclain Ultra 310 Series 2 Manual

Features a 5 to 1 turndown ratio , automatically adjusting its firing rate to match your home's heating demand, which reduces cycling and saves energy. Includes outdoor reset and domestic hot water (DHW)

The brain of the Ultra 310 is the , which manages everything from blower speed to gas flow. Ultra Gas Boiler Series 4 - Weil-McLain Weil Mclain Ultra 310 Series 2 Manual

Maximizing Efficiency: Your Essential Guide to the Weil-McLain Ultra 310 Series 2