Insulating a Dunsley Type R Neutralyser

[stillrandom]

Hi,

I've just fiited a Dunsley to combine tha Aga and Bolier into a thermal store. All working, so I need to insulate the Dunsley (all the other stuff is done) the Dunsley is fitted to a wall (3ft of the ground) and a partion is going to be built in front of it (so the Dunsley and pipes will be accessed from the side). Does anyone have any recommendation on what to use to insulate this extremely hot tank given that there is limited space around it.

Cheers

Andy

 

[oilman]

Mineral wool. You can get some with aluminium foil on one side too.

 

[BigBurner]

Hi,

I've just fiited a Dunsley to combine tha Aga and Bolier into a thermal store.

UH? A thermal store does away with the likes of a Dunsley.

 

[stillrandom]

Not when it's on the same floor as the aga.
The aga has to be gravity up to the dunsley, the dunsley can then be pumped to the thermal store.
The Dunsley is also fed by other sources (oil boiler/ log burner)

The mineral wool/foil sounds ideal.

 

[BigBurner]

Not when it's on the same floor as the aga.
The aga has to be gravity up to the dunsley, the dunsley can then be pumped to the thermal store.
The Dunsley is also fed by other sources (oil boiler/ log burner)

The mineral wool/foil sounds ideal.

The Dunsley is a total waste of time. The AGA can heat the thermal store by gravity too. You should have asked proper Qs here.

 

[stillrandom]

I'm not sure I understand you, the aga sits in the kitchen and the thermal store sits in the utility room on the same floor as the aga, at no point can you get a gravity flow from one to the other (unless you angle a pipe across the kitchen).

So I'd be very interested if you could explain how this could work.

 

[oilman]

The Dunsley is a total waste of time. The AGA can heat the thermal store by gravity too. You should have asked proper Qs here.

The question was "Does anyone have any recommendation on what to use to insulate this extremely hot tank given that there is limited space around it."?

You haven't answered the question, just hijacked the thread to vent your prejudices. You should give proper answers.

 

[BigBurner]

The Dunsley is a total waste of time. The AGA can heat the thermal store by gravity too. You should have asked proper Qs here.

The question was "Does anyone have any recommendation on what to use to insulate this extremely hot tank given that there is limited space around it."?

You haven't answered the question, just hijacked the thread to vent your prejudices. You should give proper answers.

I major point arose which the OP needs sorting. You are showing your ignorance.

 

[BigBurner]

I'm not sure I understand you, the aga sits in the kitchen and the thermal store sits in the utility room on the same floor as the aga, at no point can you get a gravity flow from one to the other (unless you angle a pipe across the kitchen).

So I'd be very interested if you could explain how this could work.

A slow moving pump, which is far cheaper that that silly Dunsley thing. The f/return pipes could even be in 15mm as the Aga doesn't generate that much heat. They could also go just about anywhere. Or the T Store on a stand and the Arga's pipe slanting slightly upwards.

You should ask proper Qs before you buy expensive needless things. Your Aga is run on oil so there is control, not run away solid fuel.

Rip out the Dunsley and do it properly and then no need to insulate anything.

A heat bank/thermals store is a "neutral point", so no need for a Dunsley at all.

 

[cider]

Sorry BB, I think the setup sounds good for the aplication.
As for pumping a 15mm circuit through an Aga, def a no no.
The boiler from an Aga needs to gravitate at its own pace so only useful heat will end up in the system when its hot enough, otherwise you could be pumping hotter water into the Aga from the store.
It doesn't however need to be a dunsley but could be another small cylinder with multi tappings which works out cheeper.

 

[stillrandom]

I'm sorry BigBurner, but if you're suggesting putting a pump (however slow moving) directly onto an Aga then you're either showing your ignorance or have a very cavalier attitude to safety.

Not only that but I think you'll find building regs might have something to say about pumping an unregulated heat source.

All that being said the Dunsley is taking multiple heat sources as I said earlier and so is the ideal medium for what I've acheived.

However we are getting away from the point of the thread which was about insulating the dunsley, and as nobody has contradicted oilman, then I'll go with his sound advice.

edit - cider beat me to it

 

[BigBurner]

Sorry BB, I think the setup sounds good for the aplication.

It is not good at all, when he already has a neutral point in the thermal store.

As for pumping a 15mm circuit through an Aga, def a no no.
The boiler from an Aga needs to gravitate at its own pace so only useful heat will end up in the system when its hot enough, otherwise you could be pumping hotter water into the Aga from the store.
It doesn't however need to be a dunsley but could be another small cylinder with multi tappings which works out cheeper.

A pipe stat can be on the flow to switch in the pump. A small and slow moving pump. An in-line balancing valve can be fitted to guage the flow rate. Simple and easy. No inefficient, needless empty copper cylinder.

It work out cheaper not having any cylinder or Dunsley at all.

 

[BigBurner]

I'm sorry BigBurner, but if you're suggesting putting a pump (however slow moving) directly onto an Aga then you're either showing your ignorance or have a very cavalier attitude to safety.

Not only that but I think you'll find building regs might have something to say about pumping an unregulated heat source.

Point to the reg or are you making it up?

A small Pressure relief valve can be fitted on the line if need be. It is only a small hot water circulator and any one of them can be pumped. Just pump on a PRV for safety requirements. It will be on an open vented system anyway. It will more than likely blow out via the flow to the thermal store than via the PRV, if any problems.

All that being said the Dunsley is taking multiple heat sources as I said earlier and so is the ideal medium for what I've acheived.

It isn't when you already have a Dunsley in the thermal store.

 

[cider]

Why rubbish an installation you haven't see and say you would do it another way (sorry a better way). Its not always practical to site things where you want, and stillrandom has done a proper job which is safe and simple to use.
There is nothing easier in the world then to say you would have done a job different or better, but people with integrity know when to keep there comments to themselves.

 

[oilman]

I major point arose which the OP needs sorting. You are showing your ignorance.

You are showing your arrogance as well as total ignorance. Regulations require compliance with the manufacturers installation instructions. For the vapourising oil Aga these include a gravity circulated, open vented heat leak piped using 28mm copper.

So at least know about what you are spouting before you spout.