sorry cant understand lol..

got example?

my water pump is 500watt
agreed on the suggestions given by everyone. will most probably off the water pump and only use it for the rain shower

my rain shower is 15 inch by 15 inch for 1 head. I have two shower heads.
so I needed to change all the piping to make sure sufficient water flow and add a water pump so gain optimum use of the rain shower.
as for the water pump, there are smaller water pump that may be suited for just a rain shower, but my water pump connects to all my bathrooms upstairs.

the instant water heater will give you hot water, but it cannot be considered as a rain shower and may not have enough pressure.

This post has been edited by ajai@jakes: Jul 8 2015, 01:57 PM

500w (0.5kw x 3 hours for full day x 30 days = 45kwh x 0.256 right = Rm11.52 x 6%GST = Rm12.22 already per month

I can still accept that amount as it expected such an increase due to the rain shower.

don't think I can live without air conditioning for a week.

in terms of trees providing shading, that will not happen so soon.

as to calculate the volume of my house..i am not a technical person nor am I good with numbers.

If you want do accurate m, just list down from 1 day operate from each electronic items wastage.

Such as Aircon
Hair Dryer
Cloths dryer
Water pump
Fridge
Washer
Electric teapot & water boiler else

Add electric cooker

This post has been edited by kimsim: Jul 8 2015, 02:05 PM

then at least do it for a day when its not too hot and not too cold so you can an estimate. there is no way around if you really want to know. alternative you can buy voltmeter(s) to plug between the power points and gather data. if you want consumption to go down or find the culprit you need to be willing to search for it.

calculate the volume of the house is easy:

ceiling height x widh x space of each room in sqft gives cubic feet. you only need to do this for the rooms that you are airconditioning at the moment. open door = adjoining room is also aironditioned.

then you do the same for the old place. see how much volume difference you have. this will already give you an idea. for the lack of shading etc. you can possibly also expect that the power needed to cool down to the same temperature caneasily be anywhere between 10-30% more consumption.

i am pretty sure its the A/C thats causing the pain.

forgot to double check with you:

Electrolux clothes dryer = +/-6 hours a week
Rubine brand built in oven which I use +/-5 hours a week
Deep oil fryer (no brand) which I use +/- 1 hour a day

those (same) items you used roughly the same in the old house right?

This post has been edited by PJusa: Jul 8 2015, 03:49 PM

The main issue what is the actual temperature are you setting now?

Also how big the room size with the right Aircon now?


Just simple list here

the airconds I consistently use are in the bedrooms, so hardly any open and shut of doors once we sleep.
my current bedrooms are about +/-250sqft each. I think the rooms at my old place would be about +/-170sqft.
the difference are the air conditioners used. the old condo, I used national brand 1hp non inverter air-conditioners, each maybe about 10 to 12 years old. the temp I used to set was about 21c with the second fan.
the new place, I used York 1hp inverters with temp set at 26c with the lowest fan.
I am also pretty sure that it is the air conditioning. will have to figure this out soon.

the clothes dryer I have reduced usage to about 90% since I am on landed property now.
oven was also used at the old condo about the same number of hours.
also used the same deep fryer.

=/-250 sq ft with 1hp inverter air conditioning set at 26c with the lowest fan.
I also use a ceiling fan at the lowest speed for air circulation.

1HP for 250 sqft is way small leh.

well, that is the size of the room before putting in all the built in cabinets, chest of drawers, carpets, queen size beds. so after putting everything in, it should be down to about +/-200 sqft.
by the way, I actually brought the air cond supplier to my house to measure the rooms before I bought the air conds and it was based on his advice I bought the 1hp inverters.
but lets just say, for argument sake, the air conds are underpowered, it still should not cost more than the non inverter air conds (12 year old) which I set at 21/22c with the second lowest fan right?

Seriously 250 sq ft = 4.5x 5m wide the right Aircon Hp should be on 1.5hp at least, otherwise may runs non stop.

Cause under size hp

lets just say, for argument sake, the air conds are underpowered, it still should not cost more than the non inverter air conds (12 year old) which I set at 21/22c with the second lowest fan right

ok first of you have rooms which are roughly 20% larger. hence for the same temperature you need factoring in other factors mentioned about 30-40% more cooling power. but the inverter is set to 26° vs. 21° on non-inverter which should totally offset this.

250sqft is no problem for a 1HP aircon if the place is not super-badly insultated. are the rooms under the ceiling (how hot is the ceiling)? this might be a problem. windows - do they leak air a lot?

put a power meter between each a/c to see daily consumption to pinpoint. it could be a/c problem (running full force for whatever reason), too much heat from ceiling or walls, bad insulation or all. the other things wont contribute much to justify 40 units a day. i would guesstimate (!!) 10-15, tops 20 units go to ur non-A/C appliances. the rest is A/C.

That's a huge jump.. in the billing amount.

I know inverters are energy saving but frankly if a air con is underpowered to cool a room, doesn't it require alot of energy to cool a big room that requires adequate HP size?

Then it would explain why your bill hiked considering the number of hours it is on and the energy taken to cool the room.

night time running and temperature setting of 26 deg C..
i am pretty sure the AC can reach the set temperature and the compressor will reduce speed to save power.
the fan speed of the AC will not consume much electricity.
the main thing is the compressor, but even at 80% running, it'll be around 640W x 10 hours?
6.4kWh.. x 0.5 cents x 30 = RM 96..
try sleeping with your kids 1 night and see read the meter again in the morning!

Ok talk with Aircon for single unit won't cost you more than 300 kWh per monthly, I guess you have others heavy input watt thing or either used too many time of water boiler

Based on the York catalogue, the inverter I have is capable of 9100btu, which should be sufficient for a 250sq ft room.
you are right, the difference in size, I would think is off set by the setting I put on my current inverter 26c (inverters) as opposed to 21c (old).

the windows have black out curtains plus it is only 2 window panes (4ftx2ft I think, I am not too sure), plus its a new house, doubt whether the windows leak.

so what exactly shud I be looking at? how many units in total should I basically use in a day considering everything which I have put forward in this forum?

I have logged my numbers for 7pm yesterday and 7am today. I will get my number for 7pm today and 7am tomorrow and post it up here to see what my usage is. I hope it is about 40 units a day.

if it is 40units a day, what roughly should my tnb bill be for a month?