Hi all,
Current water system is a borehole going to a gravity system. Cold water tank in the loft, a vented hot water cylinder on the first floor, and an Aga on the ground floor. The Aga has a water heat exchanger, and passively heats the hot water tank (i.e. no pumps - just by convection). In the summer when the Aga is off, we just rely on the electrical immersion heater for our hot water.
We've got the opportunity to go onto mains water, so I'm looking to move to an unvented system, and ideallly, I'd like to put the new hot water cylinder in the loft, freeing up a lot of room in the airing cupboard. However, I'd still like to have the Aga heat the hot water in winter, since it's on anyway.
So, my thoughts are to buy an indirect hot water tank which also has a couple of immersion heaters for the summer. There's room to get one in the loft, and weight will be similar to current water tank.
I'd like to extend the pipes to the Aga up to the loft, and maybe use a small open water tank to create a heating circuit for the Aga hot water system. I.e. currently the hot water going through the Aga is what comes out the tap, but I'm thinking of a closed system for heat transfer only, with some inhibitor in it, as you would have on a central heating system. I'd still have it passive, so no pump or anything.
Basic diagram of current and proposed system attached.
Any thoughts or recommendations very much appreciated!
Current water system is a borehole going to a gravity system. Cold water tank in the loft, a vented hot water cylinder on the first floor, and an Aga on the ground floor. The Aga has a water heat exchanger, and passively heats the hot water tank (i.e. no pumps - just by convection). In the summer when the Aga is off, we just rely on the electrical immersion heater for our hot water.
We've got the opportunity to go onto mains water, so I'm looking to move to an unvented system, and ideallly, I'd like to put the new hot water cylinder in the loft, freeing up a lot of room in the airing cupboard. However, I'd still like to have the Aga heat the hot water in winter, since it's on anyway.
So, my thoughts are to buy an indirect hot water tank which also has a couple of immersion heaters for the summer. There's room to get one in the loft, and weight will be similar to current water tank.
I'd like to extend the pipes to the Aga up to the loft, and maybe use a small open water tank to create a heating circuit for the Aga hot water system. I.e. currently the hot water going through the Aga is what comes out the tap, but I'm thinking of a closed system for heat transfer only, with some inhibitor in it, as you would have on a central heating system. I'd still have it passive, so no pump or anything.
Basic diagram of current and proposed system attached.
Any thoughts or recommendations very much appreciated!