Continuous flow hot water cost in Hobart
A continuous flow (instantaneous) gas hot water system in Hobart costs $1,350 to $2,700 installed, around $1,975 for a typical job. It heats water on demand with no tank to run out - but in Hobart your gas supply decides whether it makes sense.
Quick answer - continuous flow hot water cost in Hobart
| System | Typical Hobart range (2026) |
|---|---|
| Continuous flow gas - supply + install | $1,350 – $2,700 (typ $1,975) |
| Gas storage (for comparison) | $1,075 – $3,150 |
| Old system removal & disposal | $90 – $315 |
How continuous flow works
Also called instantaneous or tankless, a continuous flow unit heats water only as it passes through, so there is no stored tank to run out and no standby heat loss. Hot water is effectively endless, and the wall-mounted unit is compact - handy in a small Hobart cottage or townhouse where a bulky tank is awkward. Units are sized by flow rate in litres per minute, matched to how many outlets you run at once.
The Hobart gas caveat
Continuous flow is almost always gas, and gas is the catch in Hobart. Where you have reticulated natural gas, running costs are reasonable. Where you do not - and many Hobart suburbs do not - you are on bottled LPG, which pushes running cost up and removes the cheap off-peak option a storage tank enjoys. Before choosing continuous flow, confirm whether your street has natural gas.
What affects the cost
Unit size (16, 20 or 26 L/min), indoor vs outdoor mounting, the length of any new gas line, LPG vs natural gas, and whether you add a temperature controller all move the price within the range.
Itemised example - Bellerive, 20 L/min natural gas
| Line item | Cost |
|---|---|
| Continuous flow unit (20 L/min) - supply | $1,150 |
| Install labour (plumber + gasfitter) | $480 |
| Gas line modification, tee & fittings | $190 |
| Old tank removal & disposal | $155 |
| Total | $1,975 |
If your suburb has no natural gas, weigh continuous flow against electric storage and heat pumps in our gas vs electric and heat pump guides.
Frequently asked questions
How much does a continuous flow hot water system cost in Hobart?
A continuous flow gas system runs $1,350 to $2,700 installed, around $1,975 for a typical job. Price depends on the flow rate, the gas line run, and whether the unit is mounted indoors or out.
Continuous flow or storage - which is better for Hobart?
Continuous flow gives endless hot water with no standby loss and a small footprint, but it cannot use the cheap off-peak tariff a storage tank can. In Hobart, electric storage on off-peak or a heat pump is often cheaper to run, so continuous flow suits space-poor or high-demand homes best.
Does continuous flow work on LPG?
Yes, and it is common in Hobart suburbs without natural gas. LPG raises running cost compared with mains gas, so factor in bottle rental or delivery before deciding.
Can I get an electric continuous flow unit?
They exist, but electric instantaneous units draw very high power and are expensive to run, so they are rarely worth it in Tasmania compared with a storage tank or heat pump.
What size continuous flow unit do I need?
Size it by how many outlets run at once: roughly 16 L/min for a small home, 20 L/min for a typical household, and 26 L/min for a large home or two bathrooms used simultaneously.
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