Lower your heating bills by letting the weather control your boiler's water temperature.
In short: Richard Trethewey demonstrates how to install an outdoor reset control, a device that adjusts your hydronic heating system based on external air temperatures. This simple upgrade improves energy efficiency by circulating cooler water through your home on milder days, keeping you comfortable while reducing overall energy consumption.
An outdoor reset control, or weather-responsive control system, acts as a smart bridge between your boiler and the outside environment. By mounting a sensor outdoors, the system monitors ambient air temperature and automatically modulates the boiler's output. When the weather is warmer, the system requires less heat, allowing it to circulate cooler water rather than maintaining a constant, high-temperature output.
The installation process involves mounting the control unit and sensor, securing insulated cable, and insulating pipes with foam-rubber. Necessary tools include a drill and driver with an extra-long 3/8-inch bit, alongside standard hardware like 1/2-inch sheet metal screws. This modification is a practical way to refine a hydronic heating system for better efficiency.
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Sources
- Summary by Intellect · source: How to Install Weather-Sensitive Heating Controls | This Old House
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