Recommend a new gas boiler

[Paul-c]

I have a micromat EC31 system gas boiler (30kW heating 36kW DHW) and spares are getting scarce, boilers not manufactured any more.
The existing boiler is weather compensated, separate Ch and DHW circuits within the boiler (so new boiler would require a diverter valve) and the DHW (200l Gemini duotank) has priority demand which I would like to retain
The UFH circuits and rads run at a boiler flow temp of 55 / 60*
What would be a good reliable boiler to replace above.
Thanks
Paul C

 

[Jerry]

Go for the longest guarantee for the cheapest price.

 

[Scott_D]

Go for the longest guarantee for the cheapest price.

What use is a guarentee if they take weeks to come out

 

[Jerry]

Its white box in a cupboard.
Its not sat on your driveway for the neighbours to admire.
Which companies have short waiting times in the middel of winter?

 

[sammathias]

Its white box in a cupboard.
Its not sat on your driveway for the neighbours to admire.
Which companies have short waiting times in the middel of winter?

Vaillant, glowworm, ideal in answer to your question.

 

[Jerry]

Vaillant, glowworm, ideal in answer to your question.

Love Vaillant and Ideal, especially the Vogue Max range.
Still have a soft spot for Intergas Combi's.

I refuse to work on Vokera....

 

[Paul-c]

Thanks for the info.
What about Atag or Viessmann, are they reliable and quick off the mark re warranty issues?

 

[gmartine]

I'm not familiar with that boiler but that CH water temp is high for weather comped UFH system? Consider zoning it properly with hydraulic seperation, how big is the house?

 

[Rob Foster]

Vaillant, glowworm, ideal in answer to your question.

Agree and WB often was a choice but are experiencing 3 week delays despite 300 vans on the road....hmmm not down to sheer sales numbers either
read between the lines
Rob Foster ..centralheatking

 

[Paul-c]

Hi gemartine,
The house (3400 sq ft) has 10 UFH loops in seven ground floor rooms using Heatmiser programmable stats in each room, other rooms on the first floor are in two heating zones controlled by Honeywell room stats.
The UFH blending valve is set at 58*at the moment with a return temp of 38* (I am having an issue with the manifold pump, the design requirement for total flow to all loops is 10 lt/min and the pump is giving me around seven so I have increased the temp to get more energy into the floor until the weather warms up, I don't want to disturb the system at the moment as I am getting room air temp that is just comfortable)
Does the above cover "hydraulic separation" as I am unfamiliar with that term.
Thanks
Paul C

 

[Rob Foster]

Hi gemartine,
The house (3400 sq ft) has 10 UFH loops in seven ground floor rooms using Heatmiser programmable stats in each room, other rooms on the first floor are in two heating zones controlled by Honeywell room stats.
The UFH blending valve is set at 58*at the moment with a return temp of 38* (I am having an issue with the manifold pump, the design requirement for total flow to all loops is 10 lt/min and the pump is giving me around seven so I have increased the temp to get more energy into the floor until the weather warms up, I don't want to disturb the system at the moment as I am getting room air temp that is just comfortable)
Does the above cover "hydraulic separation" as I am unfamiliar with that term.
Thanks
Paul C

Your gaff really needs a proper
heating engineer to be paid by you to design a fit and suitable system , then engage an outfit to install ...get quotes based on the specification ...its no good
trying to save lolly on here just bite the bullet
Rob Foster ....centralheatking

 

[Paul-c]

Where’s that come from Rob?
The system, designed by heating engineers twenty years ago, has worked fine up to recently ( as mentioned above) and is still giving the rooms the air temperature demanded by the room stat but because of a recent issue with litres/min through the loops I have lifted the flow temperature from 50* (designed) to 58*
I don’t need to investigate until there is a change either in the system or weather gets warmer
I don’t need anybody to sort hydraulic, plumbing, electrics, or most of the other trade issues, other than plastering, as I have done this myself over the last 40+years (including water side of boilers)
My original post related to a reliable boiler replacement
Please feel free to comment!
Paul C

 

[Alex-Gas]

Love Vaillant and Ideal, especially the Vogue Max range.
Still have a soft spot for Intergas Combi's.

I refuse to work on Vokera..

Couldn’t agree more. I’d go for the Ideal Vogue Max based on warranty/purchase price.

 

[Alex-Gas]

Take it back, I’d go for a viessmann (based on the updated information).

 

[Paul-c]

Thanks Alex

 

[gmartine]

Fair enough Paul C, it doesn't sound like you have any hydraulic separation and your system with multiple heating circuits may benefit, a low loss header being an example, any pics?

https://www.caleffi.com/sites/default/files/file/idronics 1.pdf

 

[Paul-c]

What I have is the boiler, in the garage, about 8 mtrs away from the manifold (22mm flow & return) and the two other zones valves ( first floor rads and games room)
The boiler has it's own integral pump and adjacent to the boiler is a 15-60 Alpha circulating pump. powered through the boiler
The 10 port manifold has a 15-60 Alpha also.
The system (18 years old) has worked well up to this year but now is struggling to get the UFH rooms up to temp.
The problem I have appears to be the manifold pump output as I cannot get the designed flow through each loop (boiler output constant at 56* and bed rads up to temp)
I don't want to disturb it at this time as I am getting enough heat around the house but intend investigating / changing the pump when the weather gets warmer.
Don't let the info above confuse the original thread re; boiler, as the boiler is working well at this time but spares etc are an issue.
thanks