What heating system do you suggest?

[GavLar40]

I have a modern (yr 2000) house with Gas central heating. We have gravity fed water system and radiators. Hot water in airing cupboard and cold tank in the loft. I am sure many saying 'standard' setup.
I am about to do some work on the house in series of projects:
1. Bathroom refit *2
2. New Boiler
3. Extension with underfloor heating (approx 1/2 of groundfloor so will lose some radiators from current setup)

The two bathrooms we have are bath & shower; bath - all off gravity hot water feed.
We will virtually never (or will deal with) someone in the shower while washer is on and filling a bath elsewhere.

We'd like a power (more powerful not skin stripping) shower. I don't know whether to go to a pump or try a new hot water system a. Combi boiler or b. Vented Pressurised System seems best options based on what I have read elsewhere.
Our cold water mains supply is fairly strong and reliable. I dont want to crack on with the Bathroom fit to find my boiler refit means re-work. If sensible I will get my plumber (yet to identify) to do it all in one go.
Any plumbing terms used here correctly ot incorrectly are by accident - I am a lightbulb changing DIY expert

Any help greatly appreciated !

 

[TBServices]

Correctly sized system boiler and unvented cylinder, assuming the incoming water can handle it.

Post your location if you want to find a decent plumber in your area.

 

[Ermintrude]

40kw duotec combi circa £2500

210l unvented and s plan with new boiler circa £3500

Duotec would be my bet though!!

 

[TBServices]

Don't have a baxi fitted, they're the antiques of the boiler world and leak everywhere.

 

[TBServices]

Gav, only 1 Bathroom? Or do you plan to expand?

 

[GavLar40]

2 bathrooms;
1. Bath and separate shower cubicle
2. Bath only

 

[Ermintrude]

Baxi and leaks? Obviously not a fan. Fitted literally thousands and had only a few problems never any leaks. Repaired 100's of pin holes in worcesters though! Valliant are good as are ideal. All 3 have top after sales and warranty. Baxi 40kw has best hot water output from memory!

 

[village idiot]

Only fitting Baxi at the mo. So far, no probs

 

[TBServices]

Always find baxi's leaking from thermistor pockets etc, only tiny drips but they ruin the casing.

If you're likely to need to use more than one HW outlet at a time in your 2 bathrooms, you'll need to go unvented. But it's all provisional until you've had your mains supply tested.

 

[Ermintrude]

Yes Baxi do leak on DHW sensor, you just need to nip it 1/8 of a turn on install or if it's an older boiler you have come across a 8p Vokera aluminium washer will replace the fiber one and last forever. Bit easier to rectify than many of the faults on all the others?