How to sell a boiler II

[Doggit]

Ah, so you admit it BG

But how did you know it was going to be deleted.

 

[Terry lambert]

Why would you have taken a screenshot, not likely is it

 

[PullerGas]

I've always been sceptical of the standard SEDBUK readings, so for someone to claim 120%, is really just a continuation of the extraordinarily unbelievable.

Well Dogging, until I see a Gas Meter turning back with this magical boiler, I'll agree with you.
For me, it just sounds like Marketing W.nk!!

Don't get me wrong, the Intergas range are a wonderful product, but c'mon!!!

 

[bernardgreen]

Ah, so you admit it BG

To prove that Puller Gas had posted it

But how did you know it was going to be deleted.

I reported it as bringing the forum into disrespect

Why would you have taken a screenshot, not likely is it

As above.

Because he cries to the mods

I report posts that may harm the reputation of bith the forum and the respectful and helpful people who try to help people via the forum.

 

[D_Hailsham]

It all depends on what you define as 100%. UK say its the Gross CV; Continental Europe say it's the Net CV. In the end it doesn't matter which you use, the results are the same: a condensing boiler (when it's condensing) can produce up to 8% more heat than when it's not condensing. You just have to compare the outputs at 80C/60C with those at 50C/30C. For my boiler it's 17.6kW and 19kW, so the increase is 7.95%. The input, in both cases is 18kW.

See page 4 onwards of the attached Viessmann publication.

 

[Doggit]

I reported it as bringing the forum into disrespect

I dunno Bernard, compared to some of the vitriolic posts on this site, Pullers are quite tame, so how come you do something against him, but not the others.

 

[Terry lambert]

Posts removed again for no reason

 

[bernardgreen]

Pullers are quite tame, so how come you do something against him, but not the others.

One of his faults is to create false quotes. He attacks the person and not the person's opinion.

 

[Dan Robinson]

Posts removed again for no reason

I must have disrespected Blowhardgreensl's repute

 

[bernardgreen]

Fit PT100 temperature sensors to cold in, HW out, CH flow and CH return. Add an analogue flow meter in the cold in and data log the five channels.

For few seconds after a hot water tap is turned on the boiler is running at 0% efficiency. The boiler has fired up burning gas but these seconds the water leaving the boiler on HW out is still cold.

When the hot tap is turned off there is a slight rise in temperature of the CH flow.

Processing the raw data collected over several weeks provides accurate information on the amount of heat passed to the hot water. Daily gas meter readings provide the volume of gas used from which the energy created in the combustion chamber can be calculated. . ( boiler being the only gas appliance and CH disabled for the duration ).

Efficiency is highest when filling a bath or running a shower. Efficiency is lowest when hot water flow is used intermittantly such as washing up.

 

[bernardgreen]

I must have disrespected Blowhardgreensl's repute

That sort of comment says more about the speaker ( poster ) than it does about the person.

 

[Dan Robinson]

Quite possibly.

Fit PT100 temperature sensors to cold in, HW out, CH flow and CH return. Add an analogue flow meter in the cold in and data log the five channels.

For few seconds after a hot water tap is turned on the boiler is running at 0% efficiency. The boiler has fired up burning gas but these seconds the water leaving the boiler on HW out is still cold.

When the hot tap is turned off there is a slight rise in temperature of the CH flow.

Processing the raw data collected over several weeks provides accurate information on the amount of heat passed to the hot water. Daily gas meter readings provide the volume of gas used from which the energy created in the combustion chamber can be calculated. . ( boiler being the only gas appliance and CH disabled for the duration ).

Efficiency is highest when filling a bath or running a shower. Efficiency is lowest when hot water flow is used intermittantly such as washing up.

What nonsense.

 

[Steelmasons]

You just have to compare the outputs at 80C/60C with those at 50C/30C. For my boiler it's 17.6kW and 19kW, so the increase is 7.95%. The input, in both cases is 18kW.
.

An impossibility for OUTPUT rating to exceed INPUT rating.
So we have an appliance on max rate consuming 1.7 m3/hr of gas although actually burning 1.8 m3/hr???

 

[ianniann]

An impossibility for OUTPUT rating to exceed INPUT rating.
So we have an appliance on max rate consuming 1.7 m3/hr of gas although actually burning 1.8 m3/hr???

Are you deliberately ignoring what D_Hailsham wrote? Or just arguing with someone that nobody else can see, because nobody posted what you're disagreeing with?

 

[ianniann]

Would it help to mention lower and higher heat values? What terms are you guys familiar with that will get across what is actually being reported for these boilers with >100% efficiency?