Water Meter system boiler vs combi

ThisIsWeird

Steveotwo said:

Mr.Generous said:

I estimate you'd be spending at least £5 more a year on water and only saving £100 on gas bills.

Really? So Im never going to see a payback spending around 2800 to upgrade to a combi

How old are you? Five? Hmm, well, you might...

ThisIsWeird

You only change your boiler when you need to. When it's utterly kaput.

When you need to, then you decide which system to go for, and why.

BarelySentientAI

Steveotwo said:

ThisIsWeird said:

Steveotwo said:

Mr.Generous said:

I estimate you'd be spending at least £5 more a year on water and only saving £100 on gas bills.

Really? So Im never going to see a payback spending around 2800 to upgrade to a combi

How old are you? Five? Hmm, well, you might...

Is there any need to make a comment like that? 

I think you missed the implied nod and wink.  A subtle nod to everything having a payback if you live long enough.

Albermarle

Steveotwo said:

Mr.Generous said:

I estimate you'd be spending at least £5 more a year on water and only saving £100 on gas bills.

Really? So Im never going to see a payback spending around 2800 to upgrade to a combi

In your other thread on approx the same subject, I calculated a possible payback time of around 15 years, although it was a back of a fag packet calculation. Mainly based on a new boiler being more efficient, although by far the majority of the savings would be on gas used for heating. The savings for moving to a combi would only be small part.

Steveotwo

BarelySentientAI said:

Steveotwo said:

ThisIsWeird said:

Steveotwo said:

Mr.Generous said:

I estimate you'd be spending at least £5 more a year on water and only saving £100 on gas bills.

Really? So Im never going to see a payback spending around 2800 to upgrade to a combi

How old are you? Five? Hmm, well, you might...

Is there any need to make a comment like that? 

I think you missed the implied nod and wink.  A subtle nod to everything having a payback if you live long enough.

Sorry that didn't show up on my device 😅

ThisIsWeird

Steveotwo said:

BarelySentientAI said:

Steveotwo said:

ThisIsWeird said:

Steveotwo said:

Mr.Generous said:

I estimate you'd be spending at least £5 more a year on water and only saving £100 on gas bills.

Really? So Im never going to see a payback spending around 2800 to upgrade to a combi

How old are you? Five? Hmm, well, you might...

Is there any need to make a comment like that? 

I think you missed the implied nod and wink.  A subtle nod to everything having a payback if you live long enough.

Sorry that didn't show up on my device 😅

Oops, sorry - absolutely meant as a (very poor) jokey reference to payback time  :-)

Thank you, BSAI.

casper_gutman

We have a combi and the layout means the bathroom taps get hot water very quickly, but the kitchen, utility and downstairs loo take 20-30 seconds. It's only really an issue when you really need hot water for washing up etc, as for a quick handwash or rinsing some fruit etc cold is fine. I just wish I could train the rest of the family to use the cold tap for such things. It's so pointless turning on the hot tap and making the boiler fire up if you're not even going to be using the water for long enough for it to run hot!

Steveotwo

casper_gutman said:

We have a combi and the layout means the bathroom taps get hot water very quickly, but the kitchen, utility and downstairs loo take 20-30 seconds. It's only really an issue when you really need hot water for washing up etc, as for a quick handwash or rinsing some fruit etc cold is fine. I just wish I could train the rest of the family to use the cold tap for such things. It's so pointless turning on the hot tap and making the boiler fire up if you're not even going to be using the water for long enough for it to run hot!

That's what I am worried about, the others been wasteful. How have you found having a combi?

Albermarle

casper_gutman said:

We have a combi and the layout means the bathroom taps get hot water very quickly, but the kitchen, utility and downstairs loo take 20-30 seconds. It's only really an issue when you really need hot water for washing up etc, as for a quick handwash or rinsing some fruit etc cold is fine. I just wish I could train the rest of the family to use the cold tap for such things. It's so pointless turning on the hot tap and making the boiler fire up if you're not even going to be using the water for long enough for it to run hot!

It is the same issue if you have a hot water tank. It is not related to whether it is a combi or not, but to the length of the pipe runs.
You also get the same problem with people turning the hot water tap on for a short time. The boiler does not fire up, but the already heated hot water just cools off in the pipework and energy is wasted.

FreeBear

Albermarle said:

casper_gutman said:

We have a combi and the layout means the bathroom taps get hot water very quickly, but the kitchen, utility and downstairs loo take 20-30 seconds. It's only really an issue when you really need hot water for washing up etc, as for a quick handwash or rinsing some fruit etc cold is fine. I just wish I could train the rest of the family to use the cold tap for such things. It's so pointless turning on the hot tap and making the boiler fire up if you're not even going to be using the water for long enough for it to run hot!

It is the same issue if you have a hot water tank. It is not related to whether it is a combi or not, but to the length of the pipe runs.
You also get the same problem with people turning the hot water tap on for a short time. The boiler does not fire up, but the already heated hot water just cools off in the pipework and energy is wasted.

Yer, but... That heat isn't wasted as it helps to heat the house - A rather pointless argument in my book as the heat is going in to spaces that are not used (under floorboards & behind cabinets). the other issue with long runs of pipe for DHW is the temperature drop - You want 60°C water at the kitchen tap, the boiler may need setting to 65°C. Then it is way too hot for the bathroom taps, so you then need thermostatic valves or some way to turn the DHW temperature down.

I'm inclined to turn off DHW at the kitchen sink via the isolation valve and boiling a kettle when the washing up needs doing.