User Tools

Site Tools


instantaneous_vs_storage_electric_water_heaters:which_suits_which

This is an old revision of the document!


This is the practical case for softening in the parts of the UK where mains water runs hard: not as a lifestyle upgrade, but as protection for the heating elements, appliances and pipework that hard water otherwise wears down faster than it should. A softener does not fix existing scale damage on its own, but it stops new scale forming, which changes the maintenance picture on a property considerably over the following years.

Plumb2U stocks electric showers and shower spares across the kW range, at trade prices with next-day despatch, for buyers who want the rating that actually suits the property rather than the biggest box available.

Plumb2U stocks these electric shower spares, elements, thermal cut-outs and hoses, at trade prices with next-day despatch, so a restock order lands before the next callout, not after it.

An electric shower spares supplier shower needs almost nothing from the existing hot water system, because it does not use it. It draws cold mains water and heats it instantaneously inside the unit itself, using its own dedicated electrical supply. That makes it the practical choice on properties with low or inconsistent water pressure, combination boiler systems where hot water competes with other demands, or any property where running a strong, consistent supply of pre-heated hot water to the shower simply is not realistic. Its performance depends on electrical capacity and incoming mains flow, not on the property's cylinder or boiler at all.

An instantaneous electric water heater does not store hot water at all. Cold mains water passes through a heating element on its way to the tap, and the unit's kW rating decides how much temperature rise it can deliver at a given flow rate. Push more flow through it and the water comes out cooler; the physics does not bend. That makes instantaneous units a sensible spec for a single low-demand outlet, a small flat, a static caravan, a workshop sink or a holiday let where two people are never running hot water at once.

Hard water carries dissolved calcium and magnesium, and neither mineral goes anywhere quietly. As water heats up, those minerals come out of solution and form limescale, a hard, chalky deposit that builds up wherever hot water sits or flows. The most obvious place it shows up is on immersion heaters and heating elements, where a coating of scale acts as insulation, forcing the element to work harder and longer to heat the same volume of water. Over time that means higher running costs and, eventually, elements that fail well before they should.

instantaneous_vs_storage_electric_water_heaters/which_suits_which.1791425921.txt.gz · Last modified: by nannette2921

Except where otherwise noted, content on this wiki is licensed under the following license: Public Domain
Public Domain Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki