Want to fit a a non-condensing boiler to rented property

[Bamber gaspipe]

Which is all completely irrelevant....you are all banging on about climate change & environmental issues....I ask you this Agile..when you fit a new boiler to existing radiators.do you take into account the flow & return temperatures..if you do, on an existing system, how do you achieve the magic return temp..to enable the boiler to condense as it should???

 

[Agile]

I do not normally fit boilers as I specialise in repairing them.

A condensing boiler will always be more efficient than a regular boiler because the flue gas temperature is lower.

To make a boiler operate more efficiently its important to set the CH output to match the dissipation. To reduce the return temperatures you can reduce tryhe flow through the rads and particularly reduce the flow temperature which is why some boilers have an "eco" setting.

Tony

 

[Bamber gaspipe]

`Agile wrote:

A condensing boiler will always be more efficient than a regular boiler because the flue gas temperature is lower.

it won`t if the return temperatures are not achieved, it won`t condense properly.......

To make a boiler operate more efficiently its important to set the CH output to match the dissipation.

Bit vague..how do you make a condensing boiler operate to it`s full potential?...

To reduce the return temperatures you can reduce tryhe flow through the rads and particularly reduce the flow temperature which is why some boilers have an "eco" setting.

OOOHH Dearie me..is that what the `eco` setting does..really..you might want to go away & research all of the above......

 

[Water Systems]

I seem to recall the CO2 from homes was 23%

It is actually around 40%.

 

[Water Systems]

`Agile wrote:

A condensing boiler will always be more efficient than a regular boiler because the flue gas temperature is lower.


it won`t if the return temperatures are not achieved, it won`t condense properly.......

The heat exchanger is larger anyway, so always more efficient at any temperature.

To make a boiler operate more efficiently its important to set the CH output to match the dissipation.

Bit vague..how do you make a condensing boiler operate to it`s full potential?...

You have the boiler flow temperature float in line with the outside temperature – outside weather compensation.

To reduce the return temperatures you can reduce tryhe flow through the rads and particularly reduce the flow temperature which is why some boilers have an "eco" setting.

OOOHH Dearie me..is that what the `eco` setting does..really..you might want to go away & research all of the above......

Along with you. You can both do it together.

 

[Bamber gaspipe]

[

quote="Water Systems"]

A condensing boiler will always be more efficient than a regular boiler because the flue gas temperature is lower.

True.. but won`t realise it`s true potentiall if installed improperly..99% of condensing boilers are now being installed improperly..

The heat exchanger is larger anyway, so always more efficient at any temperature

.

Not efficient if the return temp on boiler is above the temp that boiler requires to condense fully..

]quote]You have the boiler flow temperature float in line with the outside temperature – outside weather compensation.[/quote

Absolute Rubbish...you don`t know what you are talking about...

 

[Water Systems]

I do not normally fit boilers as I specialise in repairing them.

This is obvious.

To reduce the return temperatures you can reduce tryhe flow through the rads

Hogwash! You oversize the rads to run at a lower temperature. balance the rads to run at a flow of 60C and return 40C. Get a condensing boiler with a wide deltaT of 22C or more. Fit an outside weather compensator and only on about 30 days a year, and only at certain times of the day will the boiler not be condensing at around 30C return temperature.

The average winter outside temperature is 10C which equates approx' to 50C flow temp on the rads on 80C-70C deltaT. You could get the return lower than 30C on average with larger rads.

 

[Water Systems]

Water Systems:
You have the boiler flow temperature float in line with the outside temperature – outside weather compensation.

Gaspipe stupidly said.....
Absolute Rubbish...you don`t know what you are talking about...

It is ckear you don't have much a clue. It is best you stop posting as you make a fools of yourself, and read what people post. If you have any queries, ask sensible questions and they will be answered.

 

[Bamber gaspipe]

[[quotequote="Water Systems"]

You have the boiler flow temperature float in line with the outside temperature – outside weather compensation.[/quote

Absolute Rubbish...you don`t know what you are talking about...

Sorry I fit condensing combis...I retract any statements that I may have made earlier..but all my combi`s installed are condensing quite nicely...

 

[Bamber gaspipe]

[:
You have the boiler flow temperature float in line with the outside temperature – outside weather compensation.[/b][/i]

Gaspipe stupidly said.....
Absolute Rubbish...you don`t know what you are talking about...

t is ckear you don't have much a clue. It is best you stop posting as you make a fools of yourself, and read what people post. If you have any queries, ask sensible questions and they will be answered.

I obviously don`t have a clue....if you will explain I am honoured to be educated....

 

[micky p]

There is no such thing as a Biasi SE boiler!


Tony

What i meant was a Biasi Standard Efficency boiler (non condensing)


As for the flow/ return temps you lot are on about...you will do well to achieve a 20deg difference in the flow and return temps. i always thought 11 degree was the aim. Not many boilers have the option of a weather compensator but if it has one on then it will have a better chance of staying in condensing mode. Only boilers i have fit that have option of weather compensator are the viessmann vitodens 300 and the new vaillant ecotec.

 

[croydoncorgi]

i always thought 11 degree was the aim

Yes it WAS, with cast iron non-condensing boilers!

Now - it ain't. Get with the (energy efficient) project!

 

[Bamber gaspipe]

The question I asked was how do you achieve the correct temperature on the return, when installing to a system (rads) that are already in place....Water Systems didn`t answer this......anyone....

 

[corgiman]

by having a 6" primary return pipe

 

[Bamber gaspipe]

by having a 6" primary return pipe

You`re just taking the p*ss out of me now because you do not know....Water systems was half right...where is DIA