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Limescale in boiler and water heater - Causes and filters

Limescale in boiler and water heater

Limescale in a boiler, hot water tank or water heater can increase energy use, worsen heat exchange and shorten appliance lifetime. This category helps choose solutions protecting heating and domestic hot water systems from the effects of hard water.

CALCULATE BEFORE YOU CHOOSE

Useful calculators

Check the key values before choosing a solution.

Convert water hardness Compare common hardness units and better assess the scale of the problem.
Convert water hardness

Water hardness converter

Convert between °dH, mg/L and ppm as CaCO₃.

Hardness (°dH)—
Hardness (mg/L CaCO₃)—
Hardness (ppm CaCO₃)—
Indicative class—

Here ppm refers to hardness as CaCO₃, approximately mg/L in dilute water. A TDS/EC meter reading cannot be used as hardness. Descriptive boundaries: 5, 10, 15 and 21 °dH; these are not a water quality standard.

Assumptions, scope and model version

Here ppm refers to hardness as CaCO₃, approximately mg/L in dilute water. A TDS/EC meter reading cannot be used as hardness. Descriptive boundaries: 5, 10, 15 and 21 °dH; these are not a water quality standard.

Model version
MW-HARDNESS-1.0
Technical basis
1 °dH = 17.848 mg/L CaCO₃
Technical owner
MojaWoda.com
Scope
General hardness unit conversion as CaCO₃. The result does not replace water testing.
Estimate softener size Estimate the unit size from water hardness and consumption.
Estimate softener size

Preliminary water-softener sizing

Estimate the minimum resin volume from household water use and hardness.

Suggested resin volume (L)—
Estimated use (m³/month)—
Water between regenerations (m³)—
Salt per regeneration (kg)—
Salt per month (kg)—
Days between regenerations—

Before purchase, also check peak flow, connection size, iron/manganese and the required performance reserve.

The result is a starting point. Final sizing must include peak flow, iron, manganese, reserve and manufacturer data.

Assumptions, scope and model version

Example model: working capacity 2.8 m³·°dH per litre of resin, salt 0.12 kg per litre of resin, complete hardness removal. Capacity depends on resin and salt dose. Reserve, blending, timed regeneration and rinse water are excluded. Verify manufacturer data. Sizing targets 7 days, rounded up to a resin volume. Monthly usage covers 30 days.

Model version
MW-SOFTENER-1.0
Technical basis
MW-SOFTENER-1.0
Technical owner
MojaWoda.com
Scope
Preliminary household resin-volume sizing; this is not an installation design.

There are 27 products.

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WodaRO BAMBO SOFT 25L Compact Water Softener with Resin
★ 5.0
Reviews: 6

10 people bought this

WodaRO BAMBO SOFT 25 water softener

WodaRO BAMBO SOFT 25 is a compact water softener with a 25 l ion exchange resin bed PUROLITE C100-E. It removes calcium and magnesium ions responsible for hardness, protecting the installation and devices from scale. Equipped with a by-pass, residual hardness mixer, and a backlit programmer in Polish. The set includes, among others, a pre-filter with a drain valve, a hardness tester, and 2x tablet salt.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Resin
25 l
Flow
2.8 m³/h

Brand: WODARO

Free delivery within Poland
Price 500.05 €
Wall-E Wall-Mounted Water Softener with Monospheric Resin
★ 5.0
Reviews: 5

4 people bought this

Wall-E water softener, wall-mounted

Wall-e water softener with monospheric resin in an aesthetic, compact housing with the option to be wall-mounted.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Resin
14 l
Flow
1.1 m³/h

Brand: WODARO

Free delivery within Poland
Price 681.66 €
LOGIX PRO 32 Automatic Water Softener Station
★ 5.0
Reviews: 3

21 people bought this

LOGIX PRO 32 Water Softener Treatment Station

LOGIX PRO 32 is a fully automatic water treatment station for softening water in the home. Equipped with a LOGIX control head featuring SMART LOGIX intelligent control, a 9-cycle regeneration program, and brass connections with a BY-PASS. Inside, there is 32 liters of monospheric ion exchange resin. The package includes a large starter kit: 50 kg of tablet salt, pre-filters before and after the device, foam and carbon cartridges, a drain hose, and a hardness tester. We provideprogramming and lifetime technical support.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Resin
32 l
Flow
3.9 m³/h

Brand: WODARO

Free delivery within Poland
Price 727.12 €
HOME 61 WODARO Water Softener with Bypass Mixer
★ 5.0
Reviews: 1

2 people bought this

HOME 61 WATER SOFTENER WODARO Water Softener for Limescale PL

WODARO HOME 61 is a home water softening station that reduces hardness (calcium and magnesium) using the ion exchange method on resin . It operates automatically with regeneration using tablet salt , limits scale in the installation, and protects household appliances and heaters. The set includes, among others, by-pass + mixer for adjusting the degree of softening, a 1" inline pre-filter, and a tester.hardness.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Resin
20 l
Flow
2 m³/h

Brand: WODARO

Free delivery within Poland
Price 379.58 €
EcoWater eVOLUTION 400 BOOST Water Softener for Low Costs
★ 5.0
Reviews: 1

2 people bought this

EcoWater eVOLUTION 400 BOOST water softener

EcoWater eVOLUTION 400 BOOST is a modern water softener with intelligent control that reduces hardness by exchanging calcium and magnesium ions for sodium ions. The device automatically selects the regeneration moment and operates efficiently thanks to the Formula 1 algorithm. As standard, you receive a Wi-Fi module for remote monitoring, a salt level sensor, and a bypass for easier servicing. Max. flow rate: 30.3 l/min.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Flow
1.818 m³/h

Lead time confirmed in your quote
Price on request
Explore this product
EcoWater eVOLUTION 500 POWER Smart Water Softener
★ 5.0
Reviews: 1

EcoWater eVOLUTION 500 POWER water softener

EcoWater eVOLUTION 500 POWER is an advanced water softener for home use that removes excess calcium and magnesium ions from water, reducing limescale deposits. Intelligent electronics select the regeneration timing, and the Wi-Fi module allows for remote monitoring and SMS/email notifications. High flow rate, a robust head, and a practical by-pass enhance user comfort and safety.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Resin
25 l
Flow
2.16 m³/h

Lead time confirmed in your quote
Price on request
Explore this product
Supreme LOGIQ 40D Two-Component Water Softener
★ 5.0
Reviews: 1

1 person bought this

Supreme LOGIQ 40D professional two-component water softener

The SUPREME-LOGIQ series water softeners are technologically advanced devices equipped with the reliable "PERFORMA LOGIX 269" control valve from PENTAIR/USA. They offer high efficiency, low salt and water consumption, and the ability to operate in eco mode, making them an ideal choice for homes, public institutions, and industry.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Resin
40 l
Connection
1″

Brand: SUPREME

Free delivery within Poland
Price 922.59 €
WODARO CITY 41 Water Softener for Apartments

1 person bought this

Water Softener for Home CITY 41 WODARO Water Descaler for Apartment

WODARO CITY 41 is a compact water softener for apartments and homes (1-4 people) that reduces water hardness using the ion exchange method on resin . It protects the plumbing and appliances from scale, and regeneration is performed automatically using salt. You can set the parameters on the LCD panel, and thanks to the by-pass and mixer , you can adjust the degree of softening. The set includes, among others, a 1" pre-filter.hardness tester and salt 25 kg.
Solution type
Whole house / POE
Installation location
Whole-house inlet
Resin
9 l
Flow
1 m³/h

Brand: WODARO

Free delivery within Poland
Price 352.08 €
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