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New boiler time!

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Unsurprisingly the boiler man condemned the old boiler today so have to replace it. 

Due to kitchen constraints and no other options of placement it will be a like for like replacement, conventional heating type boiler with hot water cylinder in airing cupboard and water tank in the loft. Not enough room for a combi aparantly, not that I want a combi! 

We need to have a direct rear exit flue which limits the amount of boilers aparantly. 

He did mention Glow worm & maybe Valiant?

Waiting for the quote but wondered if people had any feedback on glow worm boilers?

I've heard of Valiant and think reviews are mainly positive?

Will also get another quote or two just to compare.

Thanks for any tips. 👍 


 
Posted : 21/07/2026 11:37 pm
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Posted by: granny_ring

He did mention Glow worm & maybe Valiant?

Glow worm is part of the Vaillant group.

We had a Glow worm system boiler installed 20 years ago. It lasted 10+ years but I don't recall it being a thing of either great quality or efficiency.

We had quotes to replace it, but none of the independents suggested Glow worm. We now have a Baxi, but Vaillant and Worcester-Bosch were also honourably mentioned.


 
Posted : 22/07/2026 7:08 am
granny_ring reacted
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Not a heat pump?


 
Posted : 22/07/2026 7:26 am
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Everything I've heard about Glo Worm is bad, including my parents' woeful experience. I'm under the impression they are very much built to be a budget option. 

We had a Worcester installed about 16 years ago, serviced every year and it's been ultra reliable. Had a noisy fan and some form of seal replaced a couple of years ago for about 300 quid but on a combi, that's pretty impressive IMHO. Wouldn't hesitate to go for the same again. Coincidentally, the terrible Glo Worm was replaced with a Worcester about 5 years ago and it's also been faultless.


 
Posted : 22/07/2026 7:43 am
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Most engineers just recommend what they've worked with before - they know the connections and how they go together so it's a straightforward job for them to fit. They've possible had some training on them and it might be they can make the best markup.

We had a Viessmann installed 10 years ago and it's been completely reliable. They're well made but more expensive.  I get the impression W-Bosch and Vaillant are slightly better than a lot of the other common uk brands.

I was also looking at ATAG. Dutch made, supposedly rock solid, but hard to find anyone who sells or fits in the UK (though it's possible) 

 


 
Posted : 22/07/2026 9:15 am
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Not a heat pump?

in the kitchen ? 


 
Posted : 22/07/2026 9:22 am
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Posted by: trail_rat

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Not a heat pump?

in the kitchen ? 

Depends if there's space outside or not. But if there is room I'd be taking advantage of the £7,500 grant at the moment provided that I had a smart meter for time-of-use tariffs.

 


 
Posted : 22/07/2026 9:49 am
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We have an oil fired Worcester boiler, which lives outside and to my knowledge is at least 20 years old and probably quite a lot more. We get it serviced every year and have to replace parts every so often, but it just keeps going. Just had this years service with a clean bill of health and no indication it won't last another 20 years.


 
Posted : 22/07/2026 9:56 am
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Posted by: oldnpastit

Not a heat pump?

 

🤣 🤣 🤣 🤣 not a chance

 


 
Posted : 22/07/2026 10:05 pm
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Thanks for replies.

For context, it's a 30 year old Potterton boiler that's given up or rather not safe to use. The front sealing panel hook mount has rotted away on the top and you can't get replacements any more.

Oh to get another boiler that will last that long lol.

Anyhow not great feedback on Glow worn boilers....I'm still waiting to see the quote.

I'll pop down to a supplier to ask what other makes are suitable. It's the direct rear exit on the boiler flue that counts out a lot of makes, there's not enough room in the kitchen to have a boiler with a top exit flue which most are I believe. 

Thanks so far.


 
Posted : 22/07/2026 10:19 pm
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Posted by: granny_ring

Unsurprisingly the boiler man condemned the old boiler today so have to replace it. 

The boiler man condemned the old boiler today so you'll have to get it fixed.

Condemned means "I don't know how to repair this," not "it's beyond repair and must be destroyed."  It's an isolation of the device for safety reasons until it can be addressed.

 


 
Posted : 23/07/2026 12:01 am
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It can't be addressed.

The top casing has rotted where one of the hooks for the front casing was mounted and that hook has come away, therefore the front cover doesn't give a proper seal and would be dangerous to use.

Hopefully that explains it better! 


 
Posted : 23/07/2026 12:21 am