Price is the easiest parameter to compare, which is why most people choose by it. In practice, the difference between a system that will last a decade and one that starts causing problems after two years lies in four other places.
1. Chilling volume — by how many people live in the home
Under-sink water chillers come in three main volumes: 5, 10 or 20 liters of cold water per hour. This is the figure that decides whether you'll run out of water in the middle of hosting.
For a couple or a single person — 5 liters per hour is quite enough, and costs less. For a family — 10 liters. If you host a lot or it's an office — 20. The common mistake is buying too small to save money, and then waiting for the water to cool down exactly when you need it.
2. The heating element — exposed or concealed
This is the most important detail in this guide, and it almost never appears in the ad.
An exposed heating element is in direct contact with the water. In Israel's hard water, limescale sticks to it and builds up. The thicker the layer, the more the heater has to heat the limescale first and only then the water — it works harder, consumes more and burns out early.
A concealed (dry) heating element doesn't touch the water at all. No contact — no build-up on the element itself, and the heater lasts many more years. The price difference is smaller than the cost of replacing a single heater.
One question for the supplier: is the heating element concealed or exposed? If the answer is evasive — that's an answer.
3. The chilling tank — which stainless steel
The chilling tank holds water for long periods, so its raw material matters. Ask to confirm it's 304 or 316 stainless steel. These are the corrosion-resistant grades intended for contact with food and water.
A tank made of inferior material can develop rust on the inside — in a place nobody sees, because it's closed in a cabinet. It's not a fault you notice immediately, and that's exactly the problem.
4. The filter — what it really removes
A basic filter improves taste and smell. An advanced filter also handles chlorine, heavy metals and limescale. Both are called a "filter" and both will look identical in the cabinet — the difference is in what they remove.
Before buying, ask for a list of what the system actually removes, not a general statement. We expanded on this in the guide to the four families of filtration systems.
And what about cabinet space
There's no one size fits all. Some kitchens have a free, convenient cabinet, and some have drawers, a food waste disposer and a drain coming out of the wall in exactly the wrong place. There's a solution for every situation, but it's determined by what's there — not by the catalog.
Send us a photo of under your sink on WhatsApp and we'll tell you what fits and what doesn't, before you order.
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