Is it cheaper to heat washing machine water by the machine or boiler?

Myser

Older washing machines used to have two feeds one for hot and the other for cold.

Modern washing machines only have a single cold water feed. The element heats the water to the required temperature.

It can be argued that if you already have hot water in a cylinder, it is more cheaper than using electric to heat water from cold.

However, if you try to feed hot water into a single (cold water) feed washing machine, the inlet pipework/valve etc. may not be designed for higher temperature water.

Avoriaz

Myser wrote: »

..However, if you try to feed hot water into a single (cold water) feed washing machine, the inlet pipework/valve etc. may not be designed for higher temperature water.

It would also mean the machine used hot water for all the rinse cycles as well as the wash cycle.

That would be a bit expensive.

C_Mababejive

If its a cold fill,just decant a couple of jugs full of hot water from the tap into the soap tray

Norman_Castle

HappyMJ wrote: »

15 litres....that's a huge amount.....how big are your pipes?

That's about 80 metres from your hot water cylinder/boiler to the washing machine....assuming 15mm pipes.

Mainly 15mm pipes but some older pipes heading from the roof space are 20 mm. Boiler is 10 meters away plus pipework into and from roof space (one level, so above the ceiling) plus unknown bends and diversions. I measured the amount with an 11 litre washing up bowl. Its a total from turning on the kitchen tap next to the washing machine which initially the first few litres of water through the boiler will be cold, to having hot water, not just warm, coming from the tap, so the total is pipework plus water in the boiler plus warm water.

gas4you

By the washing machine, hence why new machines are cold fill only to get the higher energy efficiency rating

cyclonebri1

I think if you are really taking the MSE aspect as far as you seem to be the best way of saving would be to ensure the washer is used to capacity for every wash, well it would in our household:A:A:A

kaya

a 40 deg wash is 100% guaranteed to leave your washing full to the brim of bacteria

Avoriaz

kaya wrote: »

a 40 deg wash is 100% guaranteed to leave your washing full to the brim of bacteria

Be extra safe and burn your clothes after wearing them once.

We wash our clothes and most linen at 40 degrees. We are still alive and healthy.

adouglasmhor

kaya wrote: »

a 40 deg wash is 100% guaranteed to leave your washing full to the brim of bacteria

Only if you are washing your clothes at 40○ in raw sewage or other waste. Who told you that?

cyclonebri1

kaya wrote: »

a 40 deg wash is 100% guaranteed to leave your washing full to the brim of bacteria

I think we can assume the OP does actually bathe;);)