Abstract: Many different factors may affect a user's perceived thermal comfort level within a building. Controlling a room temperature according to what the temperature may feel like to a user (i.e. the “feels-like” temperature) may increase a user's comfort level in the building. An HVAC controller may be programmed to determine a temperature offset based on one or more environmental conditions in and/or around the building, and to apply the temperature offset to the indoor temperature, resulting in a feels-like temperature. The HVAC controller may be further programmed to control an HVAC system in accordance with the feels-like temperature.

Abstract: Methods and Systems for controlling boiler systems are disclosed. In one illustrative embodiment, a derivative action control is used reduce the likelihood of overshoot from a newly activated boiler. When a newly activated boiler becomes active, the boiler is held at a low firing rate for a predetermined period of time. The predetermined period of time may be cut short or even entirely eliminated under certain conditions. The methods and devices are further adapted for use in multi-stage boiler systems. In one embodiment, only the first stage of a multi-stage boiler system that becomes active is held at the low firing rate.

Abstract: A system and method for controlling operation of an ultraviolet air treatment device including an ultraviolet lamp positioned to treat air within an air handling system that operates in either an on state or an off state. The method includes activating the ultraviolet lamp, and determining the operational state of the air handling system. The ultraviolet lamp is deactivated upon expiration of a predetermined time period during which the air handling system remains in the off state. The predetermined time period is preferably 30-60 minutes, preferably 40 minutes for residential applications.