BOILER MANUFACTURER REPORTBOILER AND SOFTENED WATER COMPATIBILITY

H a r v e y Wa t e r S o f t e n e r s L t d • Te l e p h o n e : 0 1 4 8 3 7 5 3 4 0 0 • w w w. h a r v e y w a t e r s o f t e n e r s . c o . u k

Boiler Manufacturer Report

Introduction! 3

Responses! 4

Alpha! 5

Ariston! 6

Baxi! 7

Biasi! 8

Eco Hometec! 9

Ferroli! 10

Glow Worm! 11

Heatline! 12

Heatrae Sadia! 13

Ideal Heating! 14

Johnson & Starley! 15

Keston! 16

Main! 17

Potterton! 18

Ravenheat! 19

Saunier Duval! 20

Sime! 21

Vailant! 22

Viessman! 23

Vokera! 24

Worcester Bosch! 25

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Boiler Manufacturer ReportIntroductionSince 1992, boiler manufacturers have been led to believe that softened water is corrosive.  

Some of them have even put a warning label on their appliances stating that: “Artificially softened water should not be used in the system.”

As part of ongoing research into why this has happened, we emailed all major UK boiler manufacturers a query similar to the one below, referencing their most popular units.

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ResponsesOut of 21 manufacturers emailed, 8 replied that their boilers are fully compatible, 4 recommended hard water but accepted softened water with the correct corrosion inhibitor and 4 said softened water is incompatible with their boilers.

Boiler Manufacturer

Emailed Response Reason Followup

AlphaAristonBiasiEco HometecFerroliHeatrae Sadia (Baxi)VaillantViessmanBaxi

Glow Worm

Potterton

Worcester BoschIdeal Heating

Keston

Sime

VokeraHeatlineJohnson + StarleyMain

Ravenheat

Saunier Duval

22 Jun 2011 Yes Fully compatible17 May 2010 Yes Fully compatible28 Jun 2011 Yes Fully compatible23 Jun 2011 Yes Fully compatible and recommended18 May 2010 Yes Fully compatible and recommended6 Jul 2011 Yes Fully compatible

17 May 2010 Yes Fully compatible18 May 2010 Yes Fully compatible and recommended19 May 2010 & 23 Jun 2011

No/Yes Not recommended, but ok with correct inhibitor

30 Jun 2011 No/Yes Not recommended, but ok with correct inhibitor

18 May 2010 No/Yes Not recommended, but ok with correct inhibitor

22 Jun 2011 No/Yes Not recommended, but ok with correct inhibitor

27 Jun 2011 No No reason given Asked reason

24 Jun 2011 No No reason given Asked reason

24 Jun 2011 No No reason given Asked reason

24 Jun 2011 No Aluminum heat exchanger22 Jun 2011 - Email support not provided24 Jun 2011 - Email support not provided Contacted

installerAwaiting responseAwaiting responseAwaiting response

Please see overleaf for the original emails.

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Alpha

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 5

Ariston

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 6

Baxi

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 7

Biasi

Sent by Derrick.Allen@biasi.uk.com

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 8

Eco Hometec

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 9

Ferroli

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 10

Glow Worm

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 11

Heatline

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 12

Heatrae Sadia

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 13

Ideal Heating

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 14

Johnson & Starley

Awaiting response.

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Keston

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 16

Main

Awaiting response.

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 17

Potterton

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 18

Ravenheat

Awaiting response.

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Saunier Duval

Awaiting response.

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Sime

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Vailant

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 22

Viessman

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 23

Vokera

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H a r v e y Wa t e r S o f t e n e r s! B o i l e r M a n u f a c t u r e r R e p o r t - 24

Worcester Bosch

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