Gravity to fully pumped System

Nellybee

My central heating system is gravity fed .The boiler is a back boiler around 20 yrs old the engineer who services it every year says its still ok and can still get spares so why change it to a condensing one that would have to be placed elswhere at massive expense.So i looked ito it further as i have to have the hot water heating at the same time as the central heating this pushing up the gas bill theres only two of us so dont use a lot of hot water.Does anyone know what work this would involve and would it be a saving before i get on to my heating engineer. thanks

Head_The_Ball

If you have a well insulated hot water tank you are unlikely to be wasting much energy.

Can you fit, if one is not already fitted, a thermostatic control to the hot water tank?

Jonesya

I don't think it would save you much money at all and is quite a lot of work, at least several hundred pounds, if not more.

You'd be better checking the insulation on the hot water cylinder, fitting a cylinder jacket, lagging the pipes, checking your controller settings so the boiler/hot water is on when you're at home etc. Get the system upgraded when the time comes to upgrade the boiler.

Nellybee

The main problem i have is that theres no thermostat on the tank so the water is heated by the thermostat on the boiler.

Le_Kirk

Seems like there is no three port valve and only one circuit that goes through hot water cylinder and feeds radiators. Is that the case?

Head_The_Ball

Nellybee wrote: »

The main problem i have is that theres no thermostat on the tank so the water is heated by the thermostat on the boiler.

Assuming it can be done, fitting one has got to be far cheaper than replacing the back boiler.

Frankly, leaving it alone will probably be far cheaper if the hot water tank is well insulated. You can't be wasting more than a pound or two a week in energy costs.

You might get another 10 or 20 years out of your back boiler.

If it ain't broke, don't fix it.

Nellybee

yep that looks like what it is one circuit that goes through hot water cylinder and feeds radiators. ?

southcoastrgi

Do you have a valve on the return pipe out of the cylinder called a cyltrol valve, if not this would be a cheaper option