North America's most efficient pellet stove. The Alpine HP42 by Comfortbilt is a no-frills pellet stove with the features you care about, all at an amazing value. EPA certified efficiency - achieve eco-friendly heating with 87.5 percent on low and 86 percent overall on (higher heating value) efficiency, ensuring responsible energy usage. Customized comfort - take control of your comfort with internal temperature controls, allowing you to tailor the heat settings to your preferences, connect to a remote thermostat for added convenience.