Contractors can still offer to set up heating
systems for record cold, but still reduce the heat when it’s not needed.
Outdoor reset is a weather-responsive control rather than a weather controller.
Based on changes in outdoor temperature, it automatically adjusts boiler water
temperature. Wow, what a concept. If the temperature is colder outside, it
takes more heat to overcome its effect inside the building than if the weather
is warmer! Outdoor reset is the same as turning down the boiler water aquastat
in the spring and fall - automatically.