Harman's wood and wood pellet stoves list no special venting requirements, and are compatible with most ventilation systems designed for use with a stove. Harman also sells coal stoves through the Legacy Stoves brand, and these stoves have more robust venting demands.
Even though newer stoves offer efficient combustion, they still produce a significant amount of potentially dangerous gases. Stoves also produce water vapor, which doesn't present health threats but can damage a home. Homeowners converting a chimney to a vent system for a stove likely need to install a chimney insert, which reduces the size of the chimney. Chimneys that are too large waste heating energy and can cause water vapor to condense, potentially damaging the chimney and stove.