Lay My Hat home page Lay My Hat Forum
The forum for holiday rental owners


 
  FAQFAQ    SearchSearch    MemberlistMemberlist   UsergroupsUsergroups    RegisterRegister  
  ProfileProfile    Log in to check your private messagesLog in to check your private messages    Log inLog in 

Electric water heater.....timer or not?

 
Post new topic   Reply to topic    Lay My Hat Forum Index -> Portugal
View previous topic :: View next topic  

Permanently electrical heat water or not
Keep on 24/7
42%
 42%  [ 3 ]
Use timer for few hours each morning / evening
57%
 57%  [ 4 ]
Total Votes : 7

Author Message
Stuart41



Joined: 08 Sep 2017
Posts: 4
Location: Lagos

PostPosted: Fri Nov 17, 2017 7:05 pm    Post subject: Electric water heater.....timer or not? Reply with quote

Hi, is it better to have a timer on the electric water heater and have it heated twice a day for certain periods of time, or keep on all time? Anyone noticed differences to electricity bills?
_________________
Regards
Stuart
Back to top
View user's profile Send private message
RichardHenshall



Joined: 05 Sep 2009
Posts: 393
Location: Luz, Algarve

PostPosted: Sat Nov 18, 2017 1:19 am    Post subject: Reply with quote

If you leave the heater on 24/7 you are paying to replace the heat lost through less-than-perfect insulation and the hot water lost through consumption. Assuming you store heated water from one session to another (despite consumption) there will be little to choose between your two options.

However, if you have carefully timed sessions and use all/most of your (morning heated) water and leave the tank cold/cooler all day and the same at night, you will have lower overall heat losses and lower overall cost by using the timer.

If you have a bi-horária tariff heating using off-peak electricity will be much cheaper, so restricting heating to the relevant periods will be desirable, if you can store sufficient volume of water to meet your needs.

Regardless, get the best insulated water tank you can find. During the winter your heat loss will help to heat your property but in summer it will add to your discomfort.
Back to top
View user's profile Send private message
AndrewH



Joined: 12 Sep 2013
Posts: 1356
Location: Kefalonia, Greece

PostPosted: Sat Nov 18, 2017 6:48 am    Post subject: Reply with quote

Not in Portugal, but the same principles apply elsewhere. Our water is full of calcium and other minerals which fur up hot water elements at an alarming rate. We changed from 24/7 to timed several years ago and estimate that we get an extra 12 months of life for an electric element in consequence.
_________________
www.athenagreece.com/
Back to top
View user's profile Send private message Visit poster's website
RichardHenshall



Joined: 05 Sep 2009
Posts: 393
Location: Luz, Algarve

PostPosted: Sat Nov 18, 2017 1:05 pm    Post subject: Reply with quote

Our mains water seems to be pre-softened, so scale isn't really a problem. I believe keeping heated water below approx 60C is the best way of reducing scale formation and has the added benefit of greatly reducing the rate of heat loss compared to hotter water. If you always add colder water, your hot water is too hot.
Back to top
View user's profile Send private message
Codliveroil



Joined: 09 Jan 2015
Posts: 132
Location: Algarve

PostPosted: Sun Dec 10, 2017 8:20 am    Post subject: Reply with quote

If and when the tank needs replacing consider installing an "on demand" system.
_________________
I'm getting too old for this.............
http://www.algarvevillaforrent.com
http://www.monchiqueportugal.info
https://vidanova87126800.wordpress.com/
Back to top
View user's profile Send private message Visit poster's website
Stuart41



Joined: 08 Sep 2017
Posts: 4
Location: Lagos

PostPosted: Sun Dec 10, 2017 6:28 pm    Post subject: Timer or not Reply with quote

Thanks to all the advice, much appreciated. Just thinking that the electricity will be turned off when the property is vacant, so could be weeks or few months without use (winter). So how to ensure the timer works correctly once power restored by cleaners the day before guests arrive?
_________________
Regards
Stuart
Back to top
View user's profile Send private message
RichardHenshall



Joined: 05 Sep 2009
Posts: 393
Location: Luz, Algarve

PostPosted: Sun Dec 10, 2017 9:59 pm    Post subject: Reply with quote

If you're using a timer it will need some form of battery backup to allow for random power cuts, accidental unplugging etc in normal use. But then you have the problem of ensuring that the battery is replaced and, if necessary, the timer re-programmed.

Adding the need to last months between checks or recharges makes your task even harder.

The cost of keeping a clock/timer powered 24/7/52 is tiny compared to the cost of heating water if there's nobody at home. Maybe instead of turning off the power to the whole property you just need to ensure that the water heater is turned off, so the timer stays alive?
Back to top
View user's profile Send private message
oasiscouple



Joined: 31 Oct 2012
Posts: 408
Location: Gironde and Port Leucate, France

PostPosted: Mon Dec 11, 2017 12:25 pm    Post subject: Reply with quote

The problem doesn't arise for us here in France as our electricity is on day and night tarif, and automatically switches to the cheaper night tarif at 11pm. The water storage heater (capacity enough for a day) is only connected to the night tarif. If hot water does run out during the day, you can switch it on to heat the water and then it automatically goes back to the night tarif. We disconnect the electricity when no one is there so we use this facility when we expect an arrival during the day.
_________________
Honi soit qui peu y boit
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    Lay My Hat Forum Index -> Portugal All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group