How do I know if this plate heat exchanger is the one for my boiler?

Verify the reference S1059900 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.

The plate heat exchanger transfers heat to the domestic hot water (DHW).

Is the hot water lukewarm or does it take a long time?

It usually indicates a blocked or scaled heat exchanger.

Which models is it suitable for?

Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.

Installation and recommendations

Check the seals and descale the circuit; compare the number of plates and the connections.

What does refurbished mean and what coverage does it have?

Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

RefurbishedSaunier Duval Plate heat exchanger

Saunier Duval Primary Bithermal Heat Exchanger ThemaClassic C25E Ref. S1059900

Name: Saunier Duval Primary Bithermal Heat Exchanger ThemaClassic C25E Ref. S1059900
Brand: Saunier Duval
SKU: ITBTMACLC25E
Price: 90 EUR
Availability: InStock

90 €VAT includedIn stock · 4 units

Plate heat exchanger: refurbished spare part that transfers heat to domestic hot water. Useful if the hot water is lukewarm or takes a long time. Compatible with ThemaClassic F 25 E (ref. S1059900). Includes a one-year warranty and delivery within 2–4 working days in the EU.

Consult via WhatsApp

Not sure if it's your part? Send us a photo of the screen printing via WhatsApp and we'll confirm compatibility before you purchase.

Delivery in 2–4 working days

1-year warranty

14-day return

Technical support

Key Data

Reference: S1059900
Brand: Saunier Duval
Type of part: Plate heat exchanger
Available units: 4 units in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

The same part (ref. S1059900) equips these models. Verified compatibility; check the reference before purchasing.

ThemaClassic

ThemaClassic F 25 E

How do I know if this plate heat exchanger is the one for my boiler?: Verify the reference S1059900 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.
What is it used for?: The plate heat exchanger transfers heat to the domestic hot water (DHW).
Is the hot water lukewarm or does it take a long time?: It usually indicates a blocked or scaled heat exchanger.
Which models is it suitable for?: Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.
Installation and recommendations: Check the seals and descale the circuit; compare the number of plates and the connections.
What does refurbished mean and what coverage does it have?: Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

Saunier Duval Primary Bithermal Heat Exchanger ThemaClassic C25E Ref. S1059900

Key Data

ThemaClassic

Related Spare Parts Bithermal Boiler ThemaClassic C25E