Water Meter system boiler vs combi

Steveotwo

Kiran said:

Steveotwo said:

Albermarle said:

Steveotwo said:

it looks like the one linked below, always light up to which I find must be very wasteful 

https://www.screwfix.com/p/drayton-lp522-2-channel-digital-programmer/20673?tc=CA8&gad_source=1&gclid=CjwKCAjwufq2BhAmEiwAnZqw8mZ-rsjyKKAxFjgxlBe8X14GMxDxxMO6EMJjuKZPfxBr69nQWfsMhhoCfQoQAvD_BwE&gclsrc=aw.ds

Yes must cost about 10 p a year !

Yeah well I don't know that's why I'm asking for the advice from strangers on the internet, its also bright orange which is equally annoying 

The spec on Screwfix says 5.6W which is about 178hours to use 1 unit. Just for info, not that it can fix that annoying orange glow!

Does that mean it uses basically nothing?

Kiran

Steveotwo said:

Kiran said:

Steveotwo said:

Albermarle said:

Steveotwo said:

it looks like the one linked below, always light up to which I find must be very wasteful 

https://www.screwfix.com/p/drayton-lp522-2-channel-digital-programmer/20673?tc=CA8&gad_source=1&gclid=CjwKCAjwufq2BhAmEiwAnZqw8mZ-rsjyKKAxFjgxlBe8X14GMxDxxMO6EMJjuKZPfxBr69nQWfsMhhoCfQoQAvD_BwE&gclsrc=aw.ds

Yes must cost about 10 p a year !

Yeah well I don't know that's why I'm asking for the advice from strangers on the internet, its also bright orange which is equally annoying 

The spec on Screwfix says 5.6W which is about 178hours to use 1 unit. Just for info, not that it can fix that annoying orange glow!

Does that mean it uses basically nothing?

It's about £14/year, based on the figures I used, but @ThisIsWeird has quite rightly said, this may be the the usage in operation not constantly when doing nothing. It seems reasonable to me either way, I know that my smart system uses more than this but on the flip side saves me more by zoning the house 

ThisIsWeird

Kiran said:

Steveotwo said:

Kiran said:

Steveotwo said:

Albermarle said:

Steveotwo said:

it looks like the one linked below, always light up to which I find must be very wasteful 

https://www.screwfix.com/p/drayton-lp522-2-channel-digital-programmer/20673?tc=CA8&gad_source=1&gclid=CjwKCAjwufq2BhAmEiwAnZqw8mZ-rsjyKKAxFjgxlBe8X14GMxDxxMO6EMJjuKZPfxBr69nQWfsMhhoCfQoQAvD_BwE&gclsrc=aw.ds

Yes must cost about 10 p a year !

Yeah well I don't know that's why I'm asking for the advice from strangers on the internet, its also bright orange which is equally annoying 

The spec on Screwfix says 5.6W which is about 178hours to use 1 unit. Just for info, not that it can fix that annoying orange glow!

Does that mean it uses basically nothing?

It's about £14/year, based on the figures I used, but @ThisIsWeird has quite rightly said, this may be the the usage in operation not constantly when doing nothing. It seems reasonable to me either way, I know that my smart system uses more than this but on the flip side saves me more by zoning the house 

I suspect, very strongly, that it cannot be a constant 5.6W, as that would be unacceptable in these green times.

Thanks for your calc, Kiran; again, if one wee controller consumes £14's worth, that would be completely unacceptable.

I really don't think it can be. I'll ask... :-)

Steveotwo

BarelySentientAI said:

Steveotwo said:

BarelySentientAI 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

New boilers don't pay back with gas savings (usually) unless the one they replace is very old - think pilot light and non-condensing.

Better controls, or better use of controls, often does because the investment cost is much lower but the gas savings can still be decent.

Current boiler is a Baxi Solo system boiler from 2004 would you upgrade from that? 

I have just replaced a 1999 Potterton Supreme - but with another heat-only boiler and kept the water tank.

I don't expect a payback on it.

So Im guessing the best way to play it is, keep it till it dies. then replace with a modern condensing system boiler, keeping the tank for if I ever move to solar or a heatpump system

ThisIsWeird

Steveotwo said:

BarelySentientAI said:

Steveotwo said:

BarelySentientAI 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

New boilers don't pay back with gas savings (usually) unless the one they replace is very old - think pilot light and non-condensing.

Better controls, or better use of controls, often does because the investment cost is much lower but the gas savings can still be decent.

Current boiler is a Baxi Solo system boiler from 2004 would you upgrade from that? 

I have just replaced a 1999 Potterton Supreme - but with another heat-only boiler and kept the water tank.

I don't expect a payback on it.

So Im guessing the best way to play it is, keep it till it dies. then replace with a modern condensing system boiler, keeping the tank for if I ever move to solar or a heatpump system

Yup. :-) :-) :-)

FreeBear

Steveotwo said:

BarelySentientAI said:

Steveotwo said:

BarelySentientAI 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

New boilers don't pay back with gas savings (usually) unless the one they replace is very old - think pilot light and non-condensing.

Better controls, or better use of controls, often does because the investment cost is much lower but the gas savings can still be decent.

Current boiler is a Baxi Solo system boiler from 2004 would you upgrade from that? 

I have just replaced a 1999 Potterton Supreme - but with another heat-only boiler and kept the water tank.

I don't expect a payback on it.

So Im guessing the best way to play it is, keep it till it dies. then replace with a modern condensing system boiler, keeping the tank for if I ever move to solar or a heatpump system

You'll probably find the existing tank is no good for a heat pump, and unless it has a secondary coil, totally useless with solar. But if you go for PV solar, the immersion heater could be used to soak up excess electricity, and the surplus exported to the grid (way better than wet solar panels).

Steveotwo

Thanks Ill look into that. So lets say my boiler goes in winter what would my best move be combi or system?

Kiran

System if you want to future proof or you are likely to have multiple DHW outlets running at the same time, If you want the space back and only expect to be be drawing hot water form one place at a time. It's really user dependent. 

Steveotwo

Kiran said:

System if you want to future proof or you are likely to have multiple DHW outlets running at the same time, If you want the space back and only expect to be be drawing hot water form one place at a time. It's really user dependent. 

currently four of us but can't recall using the water at different time sin the last house, may change as the kids turn into teenagers I guess

ThisIsWeird

ThisIsWeird said:

I suspect, very strongly, that it cannot be a constant 5.6W, as that would be unacceptable in these green times.

Thanks for your calc, Kiran; again, if one wee controller consumes £14's worth, that would be completely unacceptable.

I really don't think it can be. I'll ask... :-)

After a couple of toosandfros, Danfoss have escalated my Q to their engineering dept. :-(

What they did say was, (a) they don't know where SF got their 5.6W figure, and it certainly isn't the 'standby' running consumption, and (b) until confirmed by tech, the fellow estimated an annual 2.1kWh, which would be around 45p? And also that it uses less power than an alarm clock.

That makes sense.