Combi or Mega flow????

[robertxs]

I have a 4 bed house and I am replacing the heating and plumbing. I have had very differing advice as to the advantages of either of the above systems. Can anyone advise me which system to go for?

 

[2scoops0406]

Not a plumber, but I used to have a megaflo. One question, how big (diameter) is your rising main. 15mm is not adequate, in my admittedly limited experience.

 

[robertxs]

Not sure how big the rising main is - but were you happy with the megaflo? Someone told me theirs was very noisy

 

[IanDB]

Nobody can really advise you as they don't know what your requirements are. However if you can get hold of some information then you might be able to make yor own reasonable assessment.

Here's a link explaining about combi boilers - there's a bit about the mega flow at the end.

http://www.diyfaq.org.uk/plumbing/combi.html

I've a Megaflo system and I think it's the bees knees. One of my family has a combi system and when it's working it's pretty good too but it has had its problems. Probably just down to choice of boiler.

There's also some more info here http://www.plumbingpages.com/featurepages/index.cfm

 

[2scoops0406]

Not sure how big the rising main is - but were you happy with the megaflo? Someone told me theirs was very noisy

It wasn't noisey, but the performance wasn't really adequate due to a 15mm rising main.

 

[IanDB]

performance wasn't really adequate due to a 15mm rising main.

I think water pressure comes into this as well somewhere along the line. However, the tank is pressurised via a reducing valve so presumably you'd be OK unless the mains pressure was under 3 bar (can this happen?)

 

[oilman]

In for a penny, in for a pound. Don't mess about, have both, just make sure you are effin rich and have a service guy you like. You will be seeing him from time to time, and if you like him it might make parting with wads of notes a little easier.

I'm of to do a repair job on a Megaflow tomorrow, nearly £300 + VAT, and that's trade for the parts. There's mark-up and labour to add.

 

[kevplumb]

now theres a suprise

did somebody mention combi by any chance

 

[corgiman]

on costs to repair the megaflow should work out cheaper, ther is a lot more to go wrong in a combi

also, if you have the flow/pressure to hand., and unvented cylinder will **** all over even the biggest combi for hot water delivery

as a tutor I had a few moons ago said

a vented cylinder is a mini
a combi/heat store is a good solid rover
a unvented is a roller

you pays yer money yer takes yer choice