I'd like a bit of advice please.
My elderly parents presently have an old Glow Worm 65/80 floor standing boiler in the basement, it runs 20 radiators (that's counting doubles as 2) and the hot water tank.
The property is a chalet bungalow, their bedroom is on the ground floor, they recently converted the huge loft space and installed 5 more rooms up there (god knows why!!!) 2 of those rooms are heated but in the other three, the hot water for the radiators doesn't make it that far, the supply pipes for those has to go up and over what's left of the loft space, run alongside the CH supply tank thus resulting in "negative head"....... not the main question here... but would a pump solve that problem?
The flue from the boiler is plumbed up through the old chimney along what appears to be an 8inch asbestos pipe, it feeds the main circuit on 22mm pipes and the gunfoss 3 speed pump hums happily away next to it.
My parents want a more efficient boiler (we're told a pressurised system would solve the negative head problem for the 2 loft radiators)
What I'm wondering is if a condensing combi would be the way to go, if so, would the flue still be ok to go up the chimney, I'm thinking the flue output will have lots of water vapour and not sure if it'll just condense in the brick stack and saturate everything. There is room for re-siting the boiler and flue outlet to an outside wall.
Would a floor standing conventional boiler be the easiest way to go, if so, how would the negative head problem be solved, the cold water storage tank won't raise any higher.
Then we get into the pressurised hot water systems, another friend has one of those beasts fitted and that ones way beyond my knowledge, I'm already skimming the bounderies with everything else above!
I'd be gratefull of any feedback
My elderly parents presently have an old Glow Worm 65/80 floor standing boiler in the basement, it runs 20 radiators (that's counting doubles as 2) and the hot water tank.
The property is a chalet bungalow, their bedroom is on the ground floor, they recently converted the huge loft space and installed 5 more rooms up there (god knows why!!!) 2 of those rooms are heated but in the other three, the hot water for the radiators doesn't make it that far, the supply pipes for those has to go up and over what's left of the loft space, run alongside the CH supply tank thus resulting in "negative head"....... not the main question here... but would a pump solve that problem?
The flue from the boiler is plumbed up through the old chimney along what appears to be an 8inch asbestos pipe, it feeds the main circuit on 22mm pipes and the gunfoss 3 speed pump hums happily away next to it.
My parents want a more efficient boiler (we're told a pressurised system would solve the negative head problem for the 2 loft radiators)
What I'm wondering is if a condensing combi would be the way to go, if so, would the flue still be ok to go up the chimney, I'm thinking the flue output will have lots of water vapour and not sure if it'll just condense in the brick stack and saturate everything. There is room for re-siting the boiler and flue outlet to an outside wall.
Would a floor standing conventional boiler be the easiest way to go, if so, how would the negative head problem be solved, the cold water storage tank won't raise any higher.
Then we get into the pressurised hot water systems, another friend has one of those beasts fitted and that ones way beyond my knowledge, I'm already skimming the bounderies with everything else above!
I'd be gratefull of any feedback