Washing machine costs

BooJewels

You should perhaps quote Dolor @adindas if you're going to remonstrate with the numbers, they're not mine, I was only typing them out in a format the OP could access, as she's blind.

nannytone_2

To ne honest all I wanted to know which is more cost effective.
1 45 minute wash at 40 degrees or 2 30 minute waves at 30 degrees.
I so appreciate everyone's input, but for my circumstances,stances, I need an a or b answer.
I domy east to deem like I'm dismissing other options, but life isn't always so straightforward

nannytone_2

To ne honest all I wanted to know which is more cost effective.
1 45 minute wash at 40 degrees or 2 30 minute waves at 30 degrees.
I so appreciate everyone's input, but for my circumstances,stances, I need an a or b answer.
I domy east to deem like I'm dismissing other options, but life isn't always so straightforward

Jami74

nannytone_2 I don't know the answer, and am not clever enough with numbers to do any complicated maths, but my guess would be one wash at 40 being more economical than 2 washes at 30. The second option involves heating water to 30 degrees twice, whereas the first option involves heating water to 30 degrees and then heating it a further ten degrees.

QrizB

I would agree that one 40c wash is likely to be more economical than two 30c ones.

Spoonie_Turtle

I think the only way to know for sure, for your own machine and the different weights of the loads you use, would be a Tapo energy monitor if their app works with assistive tech.  If it doesn't, then maybe a standard energy monitor combined with something like the Be My Eyes or Seeing AI apps, if there's one that works for you.

[Deleted User]

adindas said:

BooJewels said:

@[Deleted User] - I'm going to repeat, in text form, the salient bits from your graphic for the benefit of the OP who is blind.

The graphic Dolor posted showed the energy consumption for 3 types of wash cycle as follows:

Standard 40°C cotton programme, partial load = 0.35 kWh
Standard 60°C cotton programme, partial load = 0.5 kWh
Standard 60°C cotton programme, full load = 0.8 kWh

Using maths to be more accurate it will need to modelled using a differential equation as it is a dynamic load (Keep changing)#. It is very complicated. Another method is direct measurement using Energy meter. But using this kWH figure above is much simple.

Now let compare it . Say the cost of electricity 30p/kWH

1. Standard 60°C cotton programme, partial load = 0.5 kWh. Cost = 0.5*30p = 15p.  But for 1 you will need to multiply it by two as you will need to do it twice so  2*15p = 30p

2. Standard 60°C cotton programme, full load = 0.8 kWh. Cost = 0.8*30p= 24p

So as expected 2 is cheaper than 1. But that difference is not significant.

It does not actually need a calculation  to proof that. If you need to do that twice with half load you will always end up with more expensive. Not to mention your valuable time for loading/ unloading, hanging it in airer, etc. Also the lifetime of your WM is shorter to be used more frequently.

Fairly meaningless figures without knowing the model of the washing machine and washload rating.

For example my Samsung you can throw 10.5kg in for 0.977 kWh (full load) or just 6kg for 0.575kWh (half load)

But just browsing around and found a 6kg Beko model uses 1.050 kWh for a 6kg wash (full load) or 0.522 kWh 3kg (half load).

Both comparing the Eco 40-60 mode and the half load Samsung works out about the same cost as full load Beko.

Really need to check your exact model and manufacturer's specs to know which is most economical.

DullGreyGuy

nannytone_2 said:

To ne honest all I wanted to know which is more cost effective.
1 45 minute wash at 40 degrees or 2 30 minute waves at 30 degrees.
I so appreciate everyone's input, but for my circumstances,stances, I need an a or b answer.
I domy east to deem like I'm dismissing other options, but life isn't always so straightforward

and no one here knowns as you've not said the make/model of your machine and even if you did then washing machine manufacturers aren't as open as other machines.

I suspect the one full load at higher temp will be more efficient than a shorter lower temp wash run twice but only your brand can definitively answer. 

BooJewels

I think I'd concur with other posters that one 40°C wash is likely to be more efficient than 2 smaller loads at 30°C.  That would be my own personal preference anyway as I'd prefer to wash a bit hotter.  I don't think, judging by numbers posted already, that you're going to be looking at massive cost differences anyway, if you balance it with the additional effort of more loads of washing.

@DullGreyGuy the OP might not know the answer and might not be able to access it either as she's blind and the model number is likely to be printed onto part of the front of the machine and the manual details, even on-line, are probably presented in a graphic format.

nannytone_2

My washer is a hotpoint and it was a model that was recalled for the fault door lock. I know that isn't too helpful.
Does seem that any savings would be negligible anyway.
Thanks for your help