Advice please if ur gas safe Old boiler change over

I have a 2 bed bungalow I need to change my old boiler, I have been advised to change boiler from vented to sealed and doing away with tanks by a gas safe engineer he has recommended this Baxi Doutec 28 kw, should i ask for larger kw?? as my worry is about hot water flow rate?? I have asked them to install boiler to the loft that will free up two cupboards in bungalow one for boiler and another for hot water cylinder at a cost of £3000.00 thoughts please.

 

I forgot to mention the all important shower it has a pump delivering 9 ltrs a min from the hot supply.

 

That was my thoughts
Labour is for 2 men and 2 to 3 days work(i have been told) but all supplies are in the loft already,
He is also putting in a magnaclean, flushing old system putting in new programmer in along with a system pressure gauge / charge taps into a cupboard so not having to go to loft to check it from time to time, I guess gas safe plumbers don't come cheap these days.

 

I did'nt know he was married to a Chinese woman

 

We want to get rid of tanks and yes have heard boilers are not built to last like they use to, but do seam to be more eco friendly now a days to scrap em after 10 years.

 

Your new on here Tez Welcome in you have been reported and the men in white coats are on there way to Tyne on wear about's are you

 

Thank for that info TC, I have also heard because it needs servicing from time to time they end up leaking and then need replacing but they may have changed the design now.

 

Thanks Tig that is helpful is it a Baxi boiler without hot water cylinder ?? I have now gone along with crispey's advice and paying more for the 33kw,job to be done in April I hope.

 

I have this in black and white you stated go up in kw you are power mad

 

Mk1 or 2