Hot water on demand, no tank required
We supply, install and repair instantaneous hot water systems across Perth, electric and gas, from compact single-point units to whole-house continuous flow. Instead of storing a tankful of hot water in advance, these systems heat water as it passes through, so there’s no tank and no standing heat loss.
Why instantaneous hot water is popular in Perth
Instantaneous units are compact, wall-mounted and space-saving, which is why they’re common in apartments, laundries and other spots where a storage tank simply won’t fit. Because they only heat water while a tap is actually running, there’s no standing loss from a tank sitting hot around the clock, and no risk of running out mid-shower the way a storage tank can.
They’re also well suited to properties with hot water needed at a distance from the main system, or where several outlets need to run at once, since the water heats on demand rather than draining a fixed supply. Sizing matters here more than on any other system type: a unit rated for one outlet won’t cope with three bathrooms running simultaneously, so we size against your actual peak flow rate, not the unit that happened to be there before.
Electric vs gas instantaneous
Electric instantaneous units work by heating water through an immersed element, and are available in single-phase or three-phase configurations depending on demand. Gas continuous flow units typically deliver a higher flow rate for whole-house use where a gas supply is already connected. Both are covered under our electric hot water and gas hot water pages if you want the full detail on either fuel type.
Boosting an existing system
An instantaneous unit doesn’t have to replace your whole system. It’s also used to top up a limited-capacity storage tank, or to back up an intermittent energy supply like a heat pump or solar system on a cloudy day or during high demand. If your current system is running short rather than failing outright, this is often a cheaper fix than a full replacement.
For the full comparison against storage systems, see our guides on instantaneous vs storage electric hot water, continuous flow vs gas storage and storage vs continuous flow.
