Homepage > Studies and Facts > Articles > Estimated Household Savings from the Prevention of Limescale Buildup
Print
Send a friend
More articles
The HydroFLOW Limescale Control Device
How Limescale Buildup Affects Boiler Energy Costs
Estimated Household Savings from the Prevention of Limescale Buildup
Estimated Effectiveness of HydroFLOW Limescale Prevention Devices
תחשיב חיסכון בחשמל

Orim Finances, Financial Consultation Office
3 Hayetzira Ramat Gan, Tel.: 03-6114636; 050-4223385
Background
WaterPath, a member of the Pazgas Group (hereinafter: "the Company"), markets Avnix, an innovative device that prevents limescale buildup in the domestic pipe system. Limescale buildup affects household appliances including washing machines, dishwashers, solar and electric water heaters, and energy consumption, among others. The device induces an electric field that prevents limescale from crystallizing on the pipe system walls, thereby preventing the flow and accumulation of limescale in every household appliances and faucet connected to the domestic pipe system.

The Avnix solution was developed in England in the 1990s. It is used by the British Gas Company, which supplies hot water throughout the country. In Israel, the Company began marketing the product, primarily to the industrial sector, about two years ago with customers including WaterPath Beit Shean, a water cooperative that transports water and produces electricity from the water flow. The Company has also set itself the goal of marketing the Avnix solution to local market households, which are directly and indirectly affected by problems involving limescale buildup in the pipe system and the appliances connected to it.

I was asked by the Company to estimate the average annual financial savings to the average Israeli household as a result from the installation of the Avnix device and subsequent solution of the limescale problem in the domestic pipe system. To prepare the estimate, I talked to the company's CEO and obtained information that explains the problem, the proposed solution and its repercussions for the water pipe system, the appliances connected to it and anything else that might be affected by applying the solution to the limescale problems.

Table No. 1.1.: How Limescale Buildup Affects Boiler Energy Costs
Cause Effect
Housecleaning Increased use of products for removing limescale spots from sinks, faucets, etc.
Solar or electric water heater Limescale buildup on the heating element results in more frequent repairs and boiler replacement.
Pipe system maintenance Blockage in the pipe system, increased wear and tear on faucets, bathtub faucet heads, etc.
Washing machine and dishwasher More frequent repairs and machine replacement due to limescale buildup on the heating element, the boiler and the machine drum.
Household electricity consumption Limescale buildup on heating elements increases the energy consumption required for a given heating period.


The annual savings of the average Israeli household from preventing limescale damage
I calculated the savings for each component separately based on the effect of the treatment for preventing limescale buildup in the water pipe system of that particular component. To make the calculation, I conducted a basic price survey and had several conversations with solar water heater technicians, plumbers and installers. Moreover, in order to complete the full calculation, I added an estimate by Mr. Rani Fischer of Rani Fischer Engineering Consultation Ltd. to the average annual energy savings.

Table No. 1.2.: The Cost of Limescale Spot Removal Preparations
Limescale Spot Removal Product Supersol Price (NIS) Annual Average Consumption Annual Average Cost (NIS)
Cillit Limescale and Rust Remover 16.99 6 102
Cillit Electric Kettle Cleaner 16.99 1 17
Total Annual Average Cost 119

Table No. 2.2: The Average Annual Savings on the Cost of Solar Water Heater Replacement

Without Treatment Cost (NIS) Product :Life Expectancy - Years Annual Average Cost
Low High Average Low High Average
Solar/electric Water Heater 1,200 1,800 1,500 5 10 7.5 178
Collectors 1,000 1,200 1,100 5 10 7.5 131
Total 309
 With treatment
Solar/Electric Water Heater 1,200 1,800 1,500 10 15 12.5 98
Collectors 1,000 1,200 1,100 10 15 12.5 72
Total 170
Total Expected Savings 139


  • The installation costs for replacing a solar or electric hot water heater were collected from the website "The Professionals," which presents price comparisons for household services.
  • Product life expectancy was estimated by a plumber with over twenty years' experience in
    the field.
  • The average annual cost was calculated as the average sum a family should save each year based on the following assumptions: a given interest rate of approximately 3.5%, and the savings period equal to the average product life expectancy. The purpose of the calculation is to translate the solar heater replacement cost from one-time to ongoing expenses.
  • The data presented in Table 2.2 above reveal that the total expected savings from preventing limescale and extending the life of the boiler are estimated at approximately NIS 139 on
    the average.

Table No. 2.3: The Savings on Annual Household Pipe System Maintenance Costs

Maintenance Cost for an Untreated Pipe System Cost (NIS) Product Life Expectancy - Years Annual Average Cost Per Point Number of Points in the Average Home Total Annual Average Cost
Low High Average Low High Average
Bathroom Faucet Heads 100 150 125 2 3 2.5 49 2 98
Faucet Filters 20 50 35 2 3 2.5 14 3 42
Faucet Replacement 120 180 150 10 15 12.5 10 3 30
Replacement of a Specific Pipe including the Opening of Walls 600 1,500 1,050 15 20 17.5 45 3 135
Total 305
Maintenance Cost for a Treated Pipe System
Bathroom Faucet Heads 100 150 125 4 5 4.5 26 2 52
Faucet Filters 20 50 35 4 5 4.5 7 3 21
Faucet Replacement 120 180 150 20 25 22.5 4 3 12
Replacement of a Specific Pipe including the Opening of Walls 600 1,500 1,050 25 30 37.5 23 3 69
Total 151
Total expected savings 154
  • The various repair costs were taken from the "The Professionals" website as described above in Paragraph 2.2.
  • Product life expectancy was estimated by a plumber with over twenty years' experience in
    the field.
  • The calculation of the average annual cost was based on the same assumptions specified in Paragraph 2.2 above.
  • The data presented in Table 2.3 above reveal that the total expected annual savings from preventing limescale in the average home in Israel are estimated at approximately NIS 154.
Table No. 2.4: The Average Annual Savings on the Cost of Washing Machine and Dishwasher Replacement

Without Treatment Cost (NIS) Product Life Expectancy - Years Annual Average Cost
Low High Average Low High Average
Washing Machine 2,000 3,000 2,500 5 8 6.5 385
Dishwasher 2,000 3,000 2,500 5 8 6.5 385
Total 770
With Treatment
Washing Machine 2,000 3,000 2,500 8 12 10 250
Dishwasher 2,000 3,000 2,500 8 12 10 250
Total 500
Total Expected Savings 270


  • The various repair costs were taken from websites that sell electrical appliances.
  • Product life expectancy was estimated by a washing machine and dishwasher repairman with over twenty years' experience in the field.
  • The calculation of the average annual cost was based on the same assumptions specified in Paragraph 2.2 above.
  • The data presented in Table 2.4 above reveal that the total expected annual savings on washing machine and dishwasher purchases are estimated at approximately NIS 270.

Summary
As previously mentioned, the expected savings from limescale buildup prevention result from reduced energy required to operate a domestic boiler; decreased use of products for removing limescale spots; and extended product life of solar and electric water heaters, domestic pipe systems, washing machines and dishwashers.

The average annual energy savings for an average household in Israel were estimated by Rani Fischer Engineering Consultation Ltd. at between NIS 95 and NIS 516. The actual savings depend on the thickness of the limescale layer on the boiler's heating element: The thicker the layer, the more energy is required to heat the water to a given temperature.

The average annual savings for an average household in Israel from the other factors were estimated by the undersigned at approximately NIS 682. Therefore, it appears that the total expected savings for a household that prevents limescale buildup range between NIS 780 and NIS 1,200
per year.