Water Heater Tank Size Guide for Singapore
The #1 Biggest Mistake is getting a tiny storage tank just to blend into your interior design. If you do this, you may:
• Waste lots of time waiting for your hot water
• Run out of hot water in the middle of your shower!! Brrrr!!
The smart thing to do is: choose a water heater based on your family's needs. This guide will show you how!
Size Guide for HDB / Condo
The Most Popular is Gen 6, 40 lit. Why?
• Speed heating functions
• Gives you double the hot water of Gen 1
• More features here: Digital Heat Technology.
The Most Green are Heat pumps:
• Run on renewable energy.
• Use free heat energy in the air to heat water.
• Heat pumps are good for large families or bathtub use.
How Much Hot Water Do You Need?
Everyone's shower time is different!
This is how many minutes of hot water they needs:
Hot water time:
• when we turn on the tap and the hot water flows
• is shorter than total shower time
• does not count time to change, soap, or dry off
How Much Hot Water Can a Heater Produce?
• Every storage heater can produce a fixed amount of hot water.
• The bigger the size, the more the hot water.
• Hot water is heated while you shower, but not fast enough to be infinite.
This table shows how much hot water you get from each heater:
Top Choice:
• For HDB: 40 lit, Gen 6 Digital
• For Condo: 50 lit, Gen 6 Digital for tubs
Size Guide for Landed Homes
There are two layouts for landed homes. Individual and Central Heating.
Most new landed homes use a central heater
• Easier to maintain
• Lower power loading
Individual Heating
• one heater supplies to one bathroom
• heater installed in false ceiling
• use the size guide above for HDB/Condo
Central Heating
• one heater for the whole house
• installed at air con ledge or roof
• use this guide below or send us your floor plan
Heat Pumps
• Costs more than normal electric heaters
• Good water pressure
• Running cost: saves 80% vs. Electric
For central heaters, heat pumps are the #1 popular choice because of 80% energy saving rate.
Size Guide for Bathtubs
Bathtubs need more hot water. Why?
• need to fill in lots of water at one go
• water fills at high flow rate
• plus one more shower at the end
Still Not Sure?
We're the Experts. Let us help you!
• take this quiz so we can understand your needs
• let us know what heater you have in mind, we'll let you know if it is suitable
It has served our family well so far, we are using the Gen 8 model. Hot water is quite instant when we turn it on.
Overall a good buy, good customer service by the sales person at their showroom too, very patient on the walk through with their range of products and not pushy on selling.
Overall a good buy, good customer service by the sales person at their showroom too, very patient on the walk through with their range of products and not pushy on selling.
Terence Leong
Google review
Very good service from Sanny, Mr. Lim, Moez, Pankaj and Abdullah. Installation was neat and spot on. Great practical advice from Sanny and Mr. Lim on how to maximize cost savings, they were never pushy or promoted the most expensive product but the one that suited my family.
Darren Leong
Google review
I got my water heater directly from AOS distributor. Sales lady explained their products in very clear and concise manner, and I did not have any difficulty choosing the right size and model for my new home.
Doreen Teo
Google review
They answered all my queries promptly. I also visited their showroom to look at the heaters and ask questions to clear my doubts. Thereafter I made a decision to invest in the heater. No regrets whatsoever. One of the best investments I have made.
Swaminathan Panchapagesan
Google review
Heater Size Guide FAQ
What happens when I run out of hot water?
On a storage heater, you’ll find yourself adjusting the mixer to the hot side more and more.
Hot water cut off is not sudden, it is gradual!
Size your heater right and you won’t run out of hot water often.
What to do if the heater size I want can't fit?
Get a digital heater (Gen 6) to max out your hot water regeneration rate.
Compared to Gen 1 heaters, Gen 6 heaters can produce 2 times the amount of hot water for the same tank size.
You can also stagger your shower time. Give enough time in between showers so the heater has time to fully ‘charge’ before the next person goes in.
If the space is very small, you can consider a tankless model like the BathBox.
