What are modulating controls?

I’d just like to know what modulating controls are exactly? What are their functions?

Asked by Beverley on 20th Apr 2022
Expert Trade Answers
"Modulating controls means that the boiler will lower the flame to match the heat demand. The old boilers would fire up and run until it overshot the heat demand then switch off and wait until the system water dropped in temperature then fire up again to full then repeat. Modulating boilers lower the flame to match the required heat and stay on while the heating is required using less fuel."
Answered on 20th Apr 2022 - Member since Mar 2022 - report
"It is a control that can go up and down, like a combi boiler, the gas valve on a combi boiler alters the amount of gas needed."
Answered on 20th Apr 2022 - Member since Apr 2022 - report
"Modulating controls are about efficiency, starting only when need it, thermostat for example"
Answered on 20th Apr 2022 - Member since Feb 2021 - report
"It's the gas valve.Depending on the heat required, it will open to what's needed from temperature stats control"
Answered on 20th Apr 2022 - Member since Jan 2022 - report
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