Arno Square 4-in-1

The Arno Square is the most directly value-aggressive 4-in-1 on this list at £499, matching the Qettle Original on price but adding chilled drinking water to the standard boiling, filtered, and mains hot-and-cold mix. The Square refers to the geometric spout silhouette, and the tap is controlled via a digital touchscreen rather than the more traditional push-and-turn levers used by Quooker and Franke.

The standout is the chilled function at this price. Most taps that deliver 3°C to 10°C chilled water start at £1,000 plus, so Arno fitting it inside a 4-in-1 along with a 2-stage filter for £499 is genuinely unusual value. The boiling temperature reaches 98°C, which is enough for tea, coffee, and most cooking even if not a true 100°C, and the cool-touch spout and spring-loaded safety lock are competent rather than cut-price.

The compromise is brand maturity and the touchscreen itself. Trustpilot reviews are visibly more split than the established players: positive on the install experience and the safety features, mixed on the touchscreen needing several presses before the boil symbol responds, and consistently critical of customer service when something does go wrong. The chilling unit also adds an extra component to the under-sink stack that an Arno-grade brand has less of a service network to support if it fails. Genuinely cheap entry into chilled water on tap, with the trade-off that you may be on your own in year three.