Hot water issues

[bengasman]

...The temperature of the water entering the boiler is lower - hence the temperature differential is greater. Schoolboy physics.

Differential may be greater, but that has nothing to do with efficiency.
Maybe you don't quite understand the difference between efficiency and efficacy.

 

[Dan Robinson]

What? No dunce-cap?

He'd only put it on backwards...

 

[mrgas]

Checking that the boiler is on maximum hot water settings in winter is good advice. Many people don't realise that a boiler is less efficient in winter than summer. Sadly, you are one of them.

I didn't realise a boiler was less efficient in winter.
Can you tell me why that is please.

The temperature of the water entering the boiler is lower - hence the temperature differential is greater. Schoolboy physics.

I may be daft here but what's that got to do with efficiency?

 

[Dan Robinson]

I would have thought the differential would be the same... .

 

[joe-90]

Yes you are daft. Efficiency doesn't come into the equation at this point.

 

[joe-90]

I would have thought the differential would be the same... .

Not between summer and winter water temperatures. Are you time served? Didn't think so.

 

[bengasman]

Yes you are daft. Efficiency doesn't come into the equation at this point.

Is this another Joe-90 then?

Checking that the boiler is on maximum hot water settings in winter is good advice. Many people don't realise that a boiler is less efficient in winter than summer.

 

[mrgas]

Yes you are daft. Efficiency doesn't come into the equation at this point.

Why did you say it does then?
Isn't this point now winter when you say a boiler IS less efficient?

 

[joe-90]

Which bit of that do you disagree with? As a device a boiler is less efficient at producing hot water in winter than summer. Just as a kettle full of cold water takes longer to heat than a kettle of warm water.

 

[bengasman]

Which bit of that do you disagree with? As a device a boiler is less efficient at producing hot water in winter than summer.

That bit. A boiler is as efficient in summer as it is in winter, unless you bother to look at the bits behind the dot e.g. a steamer rated as 91% will never be less than 90% and never more than 92% efficient, regardless of whether it is -20 or +40.

edit

In fact, if were to look at the bit behind the dot, a steamer is a fraction of a percent MORE efficient in winter than in summer. Not measurable outside a lab, but if you insist on splitting hairs.....

 

[mrgas]

Which bit of that do you disagree with? As a device a boiler is less efficient at producing hot water in winter than summer.

That bit. A boiler is as efficient in summer as it is in winter, unless you bother to look at the bits behind the dot e.g. a steamer rated as 91% will never be less than 90% and never more than 92% efficient, regardless of whether it is -20 or +40.

Yes that bit plus the bit about me been daft

 

[Agile]

I'm well aware of what a thermistor is and how it works.

Can you explain "how" a thermistor works then?

 

[bengasman]

I'm well aware of what a thermistor is and how it works.

Can you explain "how" a thermistor works then?

Joe being the proprietor of an alarm company, that should be a piece of cake

 

[Dan Robinson]

 

[Agile]

Has anyone seen the OP who started this thread?

I was wondering if we had answered his question satisfactorily?