I need to replace the boiler (an awful Baxi Bermuda back boiler) and have had many differing opinions on the best replacement. I'd be grateful for some advice.
We have a system with tanks in the loft now, and a pumped Aqualisa shower, with great pressure.. We don't want to have any reduction on pressure for the shower, and understand this type of shower won't work with a combi / megaflo, so will probably have to replace it. Fine as long as pressure is good.
We plan to extend house (3 beds, 1 bath to 5 bed, 2 bath & 1 shower).
So boiler must be able to cover these extra requirements at good pressure.
Various heating engineers have told us
1) A large combi would suffice
2) A combi won't suffice and we need a Megaflo-type system
3) We have enough water flow for a Megaflo
4) We don't have enough water flow for a Megaflo so need to mole a new main
5) We don't have enough water flow for a Megaflo so need an accumulator tank in loft.
No one has actually measured the pressure accurately, other than putting their hand under the kitchen tap.
I today measured
7.5l/min of cold water at kitchen tap with no other taps open, and
14l/min at garden tap with no other taps open
I have no pressure gauge - so don't know the pressure.
After much thought I decided to go the Megaflo because if the large combi disappointed with feeble shower pressure I would kick myself so got someone to come and quote for a Megaflo and he recommended a combi + accumulator - something else again. I am just confused now.
I have asked for Mains replacement quotes and await their replies. Affinity Water website suggests £1000-2000, a moling co website suggests £650 or so.
Opinions we have received on what we need:
a) Combi only (Ideal 30kw) £2850
b) Heat only boiler + unvented cylinder Ideal (24kw, 200l Telford) £3600
b) combi only Worcester 29cdi £4430
c) a combi + accumulator - £4700
d) boiler + Megaflo + mole new main - no quote back yet for this
I really don't mind which, I just want it to work. Both c) and d) systems require a storage tank so take up around the same room.
I think an accumulator is around the same cost as moling a new replacement mains - is this right?
An accumulator is more likely to go wrong than a new pipe and takes up loft space.
Please could you knowlegable folk give me advice on
combi + accumulator
vs boiler + Megaflo + mole new main
vs mole new main + large combi - so good mains flow but no storage tank
And the need to replace the current great shower.
Or whether advice is impossible without an accurate pressure reading.
Many thanks.
(Sorry for the longwinded message)
We have a system with tanks in the loft now, and a pumped Aqualisa shower, with great pressure.. We don't want to have any reduction on pressure for the shower, and understand this type of shower won't work with a combi / megaflo, so will probably have to replace it. Fine as long as pressure is good.
We plan to extend house (3 beds, 1 bath to 5 bed, 2 bath & 1 shower).
So boiler must be able to cover these extra requirements at good pressure.
Various heating engineers have told us
1) A large combi would suffice
2) A combi won't suffice and we need a Megaflo-type system
3) We have enough water flow for a Megaflo
4) We don't have enough water flow for a Megaflo so need to mole a new main
5) We don't have enough water flow for a Megaflo so need an accumulator tank in loft.
No one has actually measured the pressure accurately, other than putting their hand under the kitchen tap.
I today measured
7.5l/min of cold water at kitchen tap with no other taps open, and
14l/min at garden tap with no other taps open
I have no pressure gauge - so don't know the pressure.
After much thought I decided to go the Megaflo because if the large combi disappointed with feeble shower pressure I would kick myself so got someone to come and quote for a Megaflo and he recommended a combi + accumulator - something else again. I am just confused now.
I have asked for Mains replacement quotes and await their replies. Affinity Water website suggests £1000-2000, a moling co website suggests £650 or so.
Opinions we have received on what we need:
a) Combi only (Ideal 30kw) £2850
b) Heat only boiler + unvented cylinder Ideal (24kw, 200l Telford) £3600
b) combi only Worcester 29cdi £4430
c) a combi + accumulator - £4700
d) boiler + Megaflo + mole new main - no quote back yet for this
I really don't mind which, I just want it to work. Both c) and d) systems require a storage tank so take up around the same room.
I think an accumulator is around the same cost as moling a new replacement mains - is this right?
An accumulator is more likely to go wrong than a new pipe and takes up loft space.
Please could you knowlegable folk give me advice on
combi + accumulator
vs boiler + Megaflo + mole new main
vs mole new main + large combi - so good mains flow but no storage tank
And the need to replace the current great shower.
Or whether advice is impossible without an accurate pressure reading.
Many thanks.
(Sorry for the longwinded message)