What does hot water cost?

[Moscow Mule]

I was always raised with the notion that one should not use water from the hot tap for cooking or drinks. Can't think why.

Because it will have been in the tank for a while and hence subject to any infection which might be present in the system.

Water from the mains is best for cooking and drinking.

[xoggoth]

I was always raised with the notion that one should not use water from the hot tap for cooking or drinks. Can't think why.

[AtW]

There's a night rate (5p / kWh) and and another rate after a set number of units have been used (13p / kWh) shown on my bill, both of which are cheaper than the regular peak (day) rate of 18p / kWh.

I pay flat cost around 10p per kWh - you seem to have a very bizarre setup.

[TimberWolf]

Peak rate?

Ain't they all peak rate at around 10p per kWh?

I am trying not to look at my power bill

There's a night rate (5p / kWh) and and another rate after a set number of units have been used (13p / kWh) shown on my bill, both of which are cheaper than the regular peak (day) rate of 18p / kWh.

[AtW]

Oops, around 2p for a litre of boiled water (my last leccie bill shows 18p / kWh at peak rate) and around £1 for a bath.

Peak rate?

Ain't they all peak rate at around 10p per kWh?

I am trying not to look at my power bill

[TimberWolf]

0.10 kWh to boil a litre of water priced at £0.10 per kWh is £0.10?

Oops, around 2p for a litre of boiled water (my last leccie bill shows 18p / kWh at peak rate) and around £1 for a bath.

[AtW]

How long have you spent working that out?

Just enough time to make a cuppa

[Zippy]

0.10 kWh to boil a litre of water priced at £0.10 per kWh is £0.10?

How long have you spent working that out?

[AtW]

It takes about 1/10 kWh of energy to boil a litre of water and around 5kWh to heat a bath. If using electric it's near enough 100% energy conversion from energy paid for to heat, but leccie is more expensive than gas per kWh (see bills). The gas needed depends on your boiler, it's perhaps 60% efficient. Lecci is about 10p / kWh, so about 50p for a bath and 10p for a litre of tea.

0.10 kWh to boil a litre of water priced at £0.10 per kWh is £0.10?

[TimberWolf]

It takes about 1/10 kWh of energy to boil a litre of water and around 5kWh to heat a bath. If using electric it's near enough 100% energy conversion from energy paid for to heat, but leccie is more expensive than gas per kWh (see bills). The gas needed depends on your boiler, it's perhaps 60% efficient. Lecci is about 10p / kWh, so about 50p for a bath and 10p for a litre of tea.

[PRC1964]

How hot is hot?

This may help http://blog.plotwatt.com/2009/08/bes...oil-water.html

[d000hg]

At the risk of sounding like Wilmslow's sockpuppet, I was Googling for an idea of cost to heat a litre of hot water, or to run a bath. I can't find an answer, though quite a few similar questions. I could use maths and specific heat values, but doesn't anywhere list how many kWh or units of gas are needed?

Anyone?