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Boiler & Central Heating Control Types - MJC Plumbing


This allows you to control the times your heating and hot water comes on and goes off. A twin channel programmer will control both your central heating & hot water.

A single channel will only control heating and is most commonly used with a combi boiler (normal but could be wired to control hot water only if so desired)

Room thermostat

Its main function is to control the individual room temperature settings.

Our MJC Engineer will place the thermostat in the coldest part of the home ie: the front room or hallway. Once a room reaches your desired temp i.e.; 21 degrees it will shut the boiler down and once the temperature has dropped to say 19 degrees the boiler will fire and bring it back up to 21 degrees, therefore balancing the entire houses

Cylinder thermostat

Attached around a third of the way up from the bottom of the cylinder, acts similar to the room stat and once the temperature of the cylinder reaches the temperature via the control on the cylinder stat the boiler shuts down and will not fire when the temperature drops below the set temperature.

Programmable room thermostat

This incorporates a single channel programmer into one unit and will allow you to program your heating to come on at a set temperature. The programmable roomstat & room thermostatic both come in the option of wireless. The principle is exactly the same but a receiver is fitted next to the boiler that sends a signal to the roomstat or programmable room stat allowing flexibility on where a unit can be sited and avoids the complication of having to run cables and the associated re decoration costs.

Zone valves

Also know as motorized valves. The most common use is to control the flow of hot water & heating. They can also be used to create heating zones, this allows for example; the living areas to be one zone the bedrooms, bathrooms and towel rails can be another way of allowing the use of the towel rails in the summer when the rest of the heating is off. Each zone is controlled by a roomstat or programmable room stat


Fitting TRV’s in Fit into the other using all the bedrooms and rooms at use the most allow to you to control the temperature much more equally and only use it where you need to use it pretty much like turning a light switch on and off so the idea is when you’re not in the room there’s no need to heat the room you can always turn it back up again when you need it

Cylinder stats

The lower you have the temp the less gas it uses but once again will need to be at a temperature is comfortable for yourself 60 decrees is a recommend temp.

Honeywell Programmers

We recommend Honeywell programmers as this the way there laid out is a nice ergonomic way that makes navigating simple German way of thinking which partners well with insulated homes. How this works is; you set the temperature back to a lower temperature overnight that way you always keep the boiler running a much lower temperature so keeps the home and when you need to, you just topping up the heat rather than having to heat up the walls the floors etc

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