PHE 0.46m2
underfloor heating plate heat exchanger
PHE 0.46m2
underfloor heating plate heat exchanger

Plate Heat Exchanger NORDIC Ba-23-20 3/4" 90kW

Plate Heat Exchanger NORDIC TEC Ba-23-20

Plate Q'ty: 20
Connections: 3/4" BSP
Heat Exchange Area: 0.460m²

The Nordic Tec plate heat exchanger, available for purchase with optional accessories (mounting brackets with threaded screws and thermal insulation).

Heat exchanger - designed for liquid-to-liquid operation mode.

Reference: NT Ba-23-20
Condition New
Accessories for PHE
  • Exchanger only (without accesories)
  • With Thermal Insulation
  • with Wall-Mounting+Fittings
  • Full Set (with Insulation&Wall-mounting with Fittings)
On stock
VAT included


Heat Exchanger - Nordic Tec Ba-23-20 - 4x 3/4", 20 plates

In practice, it works best for use with boilers or other heating devices operating at temperatures around 50-60 degrees Celsius with a power output of approximately 15-18 kW. This heat exchanger is not recommended for connecting heat pumps as they require larger heating exchange surfaces.

Ba-23-20 gas boiler central heating PHE


- Stainless Steel S316L, brazed with 99,9% Cu

- Connections: 4x 3/4", BSP

- Working Pressure - <20 bar

The Ba-23-20 model is a liquid-to-liquid heat exchanger and should not be used with gas media, especially high-pressure gases or refrigerants prone to pressure fluctuations, such as R32, R134A, R290, and all similar ones. It shouldn't work as a condenser - plate heat exchanger in a heat pump.

- Test Pressure - 40 bar

- Max. temperature +230°C

- Flowrate - 4 m³/h

- Heat Exchange Surface of a PHE Ba-23-20 - 0.460 m²

Exchange potential - Nordic Tec Ba-23 HE

The most common application of this heat exchanger:

- installation with a fireplace with a water jacket with a capacity of approx. 15kW
- support for condensing gas boilers up to 15-18 kW
- work with heating boilers for pellets, biomass, wood or other fuel with max. 15-18kW
- DHW installations with an additional tank (connecting extra heat source)
- solar panels (traditional, glycol)
- home brewing, as a cooler of beer wort - if you want to check our homebrewing plate chillers check this out
- industrial refrigeration

PHE Ba-23-20 technical drawing
(A) - 
315 mm
(B) - 
73 mm
(F) - 
54 mm
(C) - 
278 mm
(D) - 
40 mm

How do brazed plate heat exchangers Ba-23-20 work?

A brazed plate heat exchanger is a device which consists of steel plates - spaces between them are little channels for water. Every plate heat exchanger (or just PHE) has 2 circuits, for hot and for cold fluid. Thus - heating medium and cool medium going througout the device exchange their temperatures. This device uses the simpe physical theory of heat transfer which says that between 2 fluids "Heat" is always transferred from a hot medium to a cold one. The task for a PHE is to use this procesuss to heat up the central heating installation of a house. That is the most popular application but not the only one.

Browse our catalogue and contact us if you need any help! Contact in order to size the heat exchanger

Connecting an open and closed system (or so called "sealed system") with a heat exchanger Ba-23-20

This is a classic, most widespread use of a plate exchanger. To briefly explain the issue for laymen, central heating systems can be closed (they are sealed, they are constantly circulated in them, although of course they have protection that allows you to reduce pressure in the system so that it does not lead to damage). Closed or sealed systems have a certain advantage over the open - among others they are healthier for heating devices (e.g. for boilers or heat pumps), and thanks to the fact that we do not pour water to them regularly have a less tendency to generate limescale, the main enemy of the efficient heating system. Most modern devices, e.g. gas or condensing boilers, should work in a sealed system. However, older devices, e.g. coal boilers, wood boilers or fireplaces with a water jacket are inert enough that they are recommended to be installed in the open system. It is just more secure, from the point of view of high pressure strength, generated by this type of heating (they do not have such good control on the temperature of the system, such as gas boilers that can turn off automatically at any time). So what can we do, which system to decide if we want to have 2 heat sources in our home - including one predestined to the sealed one, and the other to the open one? E.g. a heat pump + fireplace or gas heating with a fireplace? Or maybe heating by the Electric furnace with a coal boiler left just in case?
The best way to combine both systems to exchange heat without mixing the media - is a heat exchanger. However, the condition of operation of the system that connects the sealed with an open system is the correct selection. The exchanger must have the sufficient surface - otherwise the system will not work.

The plate heat exchanger with a nominal capacity of 90 kW - Ba-23-20

The above device - the 90 kW plate heat exchanger by Nordic Tec. It's important to remember that the 90 kW power is an approximate nominal value achievable under suitable heating conditions - typically requiring significant temperature differences between the heating and receiving mediums. Therefore, as a rule, we shouldn't directly compare the power of plate heat exchangers with that of boilers, for example, as they are connected in a 1:1 ratio. A 90 kW plate heat exchanger should not be used to service boilers, such as gas boilers, with a power output of 90 kW.

This device is an excellent choice if someone is looking for a heat exchanger for a 15 kW fireplace or for a boiler with a power output of approximately 15 - 18 kW.

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