When the old geyser finally rusts through, every Maltese household faces the fork: replace like-for-like with another storage tank, or go tankless with an instant heater? Both are right answers — for different homes. Here is the comparison without the salesmanship.
How each one loses money
A storage geyser heats 50–80 litres and keeps it hot, paying "standby loss" all day for the privilege — plus, in Malta, feeding its element and anode to the hard water, as the geyser guide chronicles. An instant (tankless) heater heats water only as it flows — no standby loss, endless hot water — but demands serious electrical power the moment you shower, and its narrow waterways scale up faster in hard water than a tank does.
| Storage geyser | Instant electric | |
|---|---|---|
| Unit cost | €150 – €400 | €200 – €600 |
| Installation | €80 – €200 (like-for-like) | €150 – €500 (often incl. circuit work) |
| Running pattern | Standby loss, cheap off-peak-able | No standby, peaks hard while running |
| Hot water limit | Tank size, then wait | Endless, but flow-limited |
| Hard-water lifespan | 8 – 12 years with anode care | 5 – 10, descaling dependent |
| Space | A cupboard's worth | A shoebox |
The electrical catch
This is where instant heaters win or die in Malta. A shower-capable electric instant unit draws far more power than any other domestic appliance — many single-phase Maltese supplies, especially in older flats already running AC fleets, cannot host a whole-house instant heater without supply upgrades. The pre-purchase step is an electrician's load check, and sometimes the answer is the three-phase conversation. Small point-of-use instant units (a sink, a low-flow shower) are far less demanding and often the sweet spot.
Who should choose what
Storage suits: households with predictable rhythm (heat before the morning rush, done), homes with spare cupboard space, anyone on a supply that can't take instant loads — and anyone who wants the cheapest like-for-like swap this week.
Instant suits: space-starved flats, low-occupancy homes and holiday lets where standby loss on an empty week is pure waste, guest bathrooms as point-of-use, and households that keep outrunning the tank.
The hybrid pattern quietly wins many Maltese homes: storage geyser for the main bathroom, small instant unit at the distant kitchen sink — no more running the whole tank hot for a plate wash. And whichever you pick, hard water sets the maintenance rhythm: anode changes for tanks, periodic descaling for tankless, both cheerfully handled in the annual maintenance round.
Post your current setup (photo of the unit and its label), household size and bathroom count on Qabbad's plumber page — providers will quote both routes, and flag the electrical question before it flags itself.
Frequently asked questions
Are instant water heaters cheaper to run in Malta?
Per litre of hot water, usually yes — no standby loss. But whole-house electric instant units need electrical capacity many Maltese flats lack, and hard water demands regular descaling to keep their efficiency real.
How long do water heaters last in Malta?
Storage geysers: 8 to 12 years with anode replacement every 2–3 years. Instant units: 5 to 10 years depending heavily on descaling discipline. Hard water is the clock on both.
What size geyser does a family need?
Roughly 15–20 litres of tank per person per shower window: a couple manages on 50L, a family of four wants 80L — or a schedule. Chronic running-out is the signal to size up or add a point-of-use instant unit.