What is a Boiler Thermostat?

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  • Written By: A. Leverkuhn
  • Edited By: Andrew Jones
  • Last Modified Date: 05 October 2019
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A boiler thermostat is an electrical element used for setting indoor temperatures through regulating the use of a boiler system. Since boilers most often heat a home or building with hot water, a boiler thermostat can’t regulate the use of the boiler the same way that a forced air system might. This device must have specific features that can regulate the flow or temperature of water in a boiler environment.

Typically, the boiler thermostat sets the temperature for hot water used in a boiler system. The water generally flows from the boiler tank out to various sets of radiators. These room elements then radiate heat because of the temperature difference between the hot water and the air in the room.

Alternately, a boiler thermostat can maintain temperatures by controlling the times of flow of the hot water used in the boiler system. Although some boiler thermostats are simply timed, others are programmable and can sense temperatures in order to turn on or shut off a boiler heat source. Some of these electrical components are called thermostatic radiator valves, or TRVs. These and other small components can help make a boiler system more efficient.


Homeowners and others who are looking to optimize their heating systems might be evaluating their boiler system for any potential changes that can save them costs. Some experts recommend installing more sophisticated boiler thermostat components. Those who want to upgrade their boiler system in this way should look carefully at what type of electrical set up exists for the system. Where some boilers use a standard voltage like 110 volts, others may utilize different electrical energy levels.

The use of an boiler thermostat is popular for those in many communities where government and private groups are looking at saving energy in a focused way. Using boiler thermostats can help a household reduce its carbon footprint, as well as save money. Another energy-saving tip is to insulate the boiler tank correctly.

Boiler thermostats also vary a lot in design. Where some are of a more traditional metal construction with a glass face and dials, other newer installations are digital, made of plastic with an LCD readout or display. Analog or digital boiler thermostats can be upgraded when they wear out or become difficult to read. Along with newer boiler thermostats, there are also more efficient and aesthetic radiators that often get added to a renovation or new construction project. It’s important for designers of these systems to consider adding a boiler thermostat so that the eventual users can control their energy consumption.


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