18-Plate Flat Type Combi Boiler Plate Heat Exchanger - Compatible with Demirdöküm Baxi Ariston (166mm Pin Spacing)

The 18-Plate Flat Type Combi Boiler Heat Exchanger, which ensures uninterrupted, fast and high-efficiency heating of domestic hot water (DHW) in combi boiler installations, is a professional solution developed against chronic hot water fluctuation and scaling problems. Specially supplied for field service technicians, this product fits the hydraulic groups of the target brands with original part (OEM) precision without modification, thanks to its 166mm pin spacing. Its extended 18-plate volume provides superior comfort in installations with two bathrooms or high-flow hot water demand.

High Heat Transfer and Wide Brand Compatibility

It is fully compatible with popular combi boiler models from leading brands such as Demirdöküm, Baxi, Ariston (Genus) and Glowworm. Joining 18 stainless steel plates with special copper brazing technology provides maximum resistance to sudden mains pressure fluctuations and to corrosion. The flat surface design of the heat exchanger minimizes sediment and scale build-up in the narrow water channels, ensuring a much longer service life in the field.

Technical Specifications and OEM Compatibility

The key technical details of this heat exchanger, manufactured for fast, reliable installation in the field and long service life, are as follows:

• Number of Plates: 18 Plates (Extended heat transfer surface and faster response time)
• Design Type: Flat Plate, Copper Brazed (Brazed Heat Exchanger)
• Pin (Axis) Spacing: 166 mm (Net center distance between mounting bolts)
• Operating Temperature: High thermal shock resistance between -10°C and +120°C.
• Maximum Pressure (Primary Circuit): 3 bar (Central heating circuit safety limit)
• Maximum Pressure (Secondary Circuit): 8 bar (Domestic hot water mains line pressure limit)
• Compatible Brands: Demirdöküm, Baxi, Ariston (Genus series), Glowworm (models with a 166mm block design)

Installation and Fault Note for Field Technicians

Technician Note: If your customer complains that "the water keeps going hot and cold in the shower in winter" or "the hot water flow rate is very low", the problem is most likely narrowing due to scale inside the plate heat exchanger. If the old heat exchanger removed from the appliance has 12, 14 or 16 plates, fitting this 18-plate model in its place lets the water heat up faster over a much larger surface and increases customer satisfaction. Always replace the connection O-rings (seals) during installation, and do not put the new part into service before flushing the system to remove any scale/sediment residue that may have broken off the old heat exchanger and entered the 3-way valve block.

Frequently Asked Questions

What need is the 18-plate combi boiler heat exchanger intended for?

It ensures uninterrupted, high-efficiency heating of domestic hot water (DHW); its extended 18-plate volume provides comfort especially in installations with two bathrooms or high-flow hot water demand. It was developed against hot water fluctuation and scaling problems.

Which combi boiler brands is this 18-plate heat exchanger compatible with?

It is compatible with Demirdöküm, Baxi, Ariston (Genus series) and Glowworm combi boilers.

Does the heat exchanger fit the existing hydraulic group without modification?

Yes, thanks to its 166mm pin (axis) spacing, it fits the hydraulic groups of the target brands with original part precision without modification. Its flat surface design reduces sediment and scale build-up in the narrow water channels.

What are the maximum pressure values of the heat exchanger?

It withstands a maximum pressure of 3 bar in the primary circuit and 8 bar in the secondary circuit. Its 18 stainless steel plates are joined with copper brazing technology.

Can I buy regularly with an invoice as a service company/technician?

Yes, all our sales are invoiced. All orders, including those from service companies and technicians, are placed directly through our website.

How do I track my shipment after ordering?

Your shipment tracking number is sent to your e-mail and phone after ordering; you can follow its status in the “Where Is My Shipment?” section.

Can I return or exchange the product?

Yes. Under Consumer Protection Law No. 6502 you have the right of withdrawal/return within 14 days of delivery. To avoid ordering the wrong model, we recommend that you verify compatibility before ordering. Details are on our “Delivery, Returns and Exchanges” page.

What payment and instalment options are available?

You can pay by debit/credit card and Tosla, and take advantage of instalment/credit options through Fibabanka and Akbank. Current options are listed on our “Payment Options” page.

Where is Yedepa located and how is delivery made?

Yedepa is an e-commerce site; orders are placed through yedepa.com and shipped to your address by courier from our warehouses across Turkey and from our contracted suppliers. Our head office is at Cennet Mah. 2. Yavuz Selim Cad. No:68/A, Küçükçekmece / İstanbul.