Solid fuel back boiler.

[bobbychocolate]

you need to know what your doing as the lads have said, else it will kill you also you need to be hetas registered

i would keep it open vent with a steel f and e tank

you need to know what your doing as the lads have said, else it will kill you also you need to be hetas registered

i would keep it open vent with a steel f and e tank

Cheers Shaun I will speak to my mate at stovetech and see if he will come take a look. I don't need any domestic hot water just 5 rads in total. I was just wondering if it could be done rads only without the tank as a heat exchanger.

 

[deg]

Where is all your excess boiling water gonna go in the event of pump failure or a power cut or rads turned off. Unless you are running 5 rads on gravity or similar set up be very careful.

 

[bobbychocolate]

Where is all your excess boiling water gonna go in the event of pump failure or a power cut or rads turned off. Unless you are running 5 rads on gravity or similar set up be very careful.

I was thinking a vent to outside or prv. I'm no expert but was thinking there must be a way to do just rads on their own in a closrd circuit without hot water tank coming into itcorrect me if I'm wrong,And I will have to put a tank in but I'm very limited for space as its a small cottage. Is their no way of just running the 5 rads on a circuit with prv or vent??

 

[Best]

Tbh, this thread almost read as a wind up!
If you know a really good solid fuel heating engineer, then let them sort the pipework design out. I have been doing solid fuel heating and various link ups to oil systems for many years and I know the pipework needs very professionally done.
You mention using an expansion vessel, - how would that help when your uncontrolled boiler puts the heat in the sealed system up to near boiling point? (which is actually lower if on higher pressure)
A heat leak rad won't do much to massive excess heat when circulating pump fails or electric power cut.

 

[bobbychocolate]

Tbh, this thread almost read as a wind up!
If you know a really good solid fuel heating engineer, then let them sort the pipework design out. I have been doing solid fuel heating and various link ups to oil systems for many years and I know the pipework needs very professionally done.
You mention using an expansion vessel, - how would that help when your uncontrolled boiler puts the heat in the sealed system up to near boiling point? (which is actually lower if on higher pressure)
A heat leak rad won't do much to massive excess heat when circulating pump fails or electric power cut.

Looking at it in more detail I think I'm going to have to rethink my heating and just have a wood burning stove in the living room without a back boiler as I just don't have the room to do a gravity fed system. Maybe I will just put some electric rads in upstairs and forget about solid fuel heating as it seems like it would be impossible in my small cottage.

 

[Best]

Looking at it in more detail I think I'm going to have to rethink my heating and just have a wood burning stove in the living room without a back boiler as I just don't have the room to do a gravity fed system. Maybe I will just put some electric rads in upstairs and forget about solid fuel heating as it seems like it would be impossible in my small cottage.

Certainly a room heater stove would be sensible in a small home.
If you had air conditioning then the heat from the stove would be circulated around the entire home. Careful to not oversize your choice of stove, although log size might be a consideration.
I assume you don't have any hot water cylinder, - or else unvented cylinder?

 

[townfanjon]

Tbh, this thread almost read as a wind up!
.

Snap

 

[bobbychocolate]

Certainly a room heater stove would be sensible in a small home.
If you had air conditioning then the heat from the stove would be circulated around the entire home. Careful to not oversize your choice of stove, although log size might be a consideration.
I assume you don't have any hot water cylinder, - or else unvented cylinder?

My hot water comes from a fortic immersion cylinder as we are very pressed for space.
The old install just went from the stove up through a fortic tank to heat exchange and onto rads as well there were no gravity header tanks which is why I thought there might be a way of doing just rads on their own off the stove it seems the old install was not up to scratch and I was wrong to think I could just pipe some rads off the stove. This leaves me struggling for a central heating system as i literally have no room for tanks upstairs.

 

[Best]

Still possible to use a combined thermal store cylinder.
A direct type will mean you just need two of 28mm gravity primaries connecting into the tank connections. The pumped circuit just come off the cylinder to rads and controlled by a stat - on cylinder, or perhaps advisable on primary return at cylinder.
Various types of these cylinders, some with a mains coil and some with external exchanger for mains hot.
None of them require unvented regs, as not technically unvented cylinders and have under 15 litre mains quantity.

 

[ShaunCorbs]

Still possible to use a combined thermal store cylinder.
A direct type will mean you just need two of 28mm gravity primaries connecting into the tank connections. The pumped circuit just come off the cylinder to rads and controlled by a stat - on cylinder, or perhaps advisable on primary return at cylinder.
Various types of these cylinders, some with a mains coil and some with external exchanger for mains hot.
None of them require unvented regs, as not technically unvented cylinders and have under 15 litre mains quantity.

agree with you mate but the regs have changed anything hot water is g3 registered these days