04/11/2022
What’s the ‘best’ Hot Water System for you?
When building a house most clients look only at the bottom line.
How much will it cost me?
So builders naturally quote based on the cheapest option.
But cheaping out on some items can cost you dearly over time.
And sometimes the expensive option is actually worse.
My first example of this is How Water Systems.
Here we go…
At Bunnings you can buy the following HWS units (all priced for similar sized family).
Gas $900
Electric $1,000
HeatPump $2,000
Solar $4,000
Install price is similar across the board at around $700-$1,100.
Each system type has its pros. For some it’s price. Others it’s running costs or even life expectancy.
But each have their cons too
Here’s what I mean:
An electric hot water system is cheap to buy but expensive to run.
A HeatPump HWS costs about double - fully installed - though barely makes a mark on the power bill.
-Paying for itself pretty quickly
But…
Servicing costs can make a big difference.
That electric system will need a service once every 4-years
About $200/service
= $500 over 10-years
Yet the HeatPump will need servicing every 2-years (if you’ve got the luck of the Irish).
About $300/service
= $1,500 over the same 10-years...if... your Heatpump lasts that long before dying completely.
+ I’ve heard HeatPumps can be so noisy that neighbour noise complaints can sometimes successfully force the owner to remove the HeatPump system.
Conversely, electric systems often function happily for 20-years.
…I was in Kallangur last week and a 1995 built house had a '94 stamped HWS.
I see this a lot.
Gas systems:
Gas is the cheapest of the lot. Though you may need to pay extra for the gas install certificate. And you may need to pay more for another gas cert. when selling.
Plus the cost of gas is growing rapidly.
And companies are struggling to fulfil deliveries due to staff shortages.
Meaning you may be without hot water for days, even weeks.
I had gas hot water at my last house and it was a pain.
-It stunk every-time the hot water tap was turned on. (the gas would seep through the windows and into the house)
-it would rattle and bang whenever it started up (instantaneous gas HWS)
-a blackout would mean no hot water because gas still needs electricity
-dealing with gas deliveries is a real pain when you have a dog
And that was when a refill only cost $120
It’s a lot more now.
Solar:
Solar HWS is great. Until it’s not.
They’re very expensive to buy but very cheap to run.
My parents have solar. It’s a huge system for just two people. Plus it has an electric HWS backup.
The electric backup is broken ($$) and doesn’t work.
…Even if it did work, there goes more money just to keep it ticking over.
What’s worse; even though it’s a big system for 2-people 3-days of cloud results in cold showers.
Not ideal.
So, the best thing to do is to get Electric HWS and power it through Solar panels. (Yes, solar will add about $7k to the total price but you’ll have free hot water and very low maintenance costs. Maybe even for 20+ years).
That’s just one example of choosing lower running costs over cheapest installed price.
Face brick vs Render is another.
But I’ll save that for another day.