Brazed plate heat exchangers for HVAC
Evaporators, condensers and economizers for chillers, heat pumps and boilers.
Davhex supplies HVAC-R OEMs with brazed plate heat exchangers for the new generation of low-GWP refrigerants. Design and production entirely in Italy, with the production capacity to respond right away.
→ Applications in this area
The same plate, eight different jobs.
Each HVAC application sets its own constraint: refrigerant, charge, pressure drop or footprint.
Scroll Chiller
Evaporators and condensers for scroll chillers up to about 350 kW, optimized for low-GWP refrigerants and reduced charge.
Screw Chiller
Economizers, subcoolers and heat recovery units for screw chillers, raising cooling capacity without enlarging the compressor.
VRV / VRF
Subcoolers, economizers and hydronic-module exchangers for variable refrigerant flow systems, compensating pressure drop on long refrigerant lines.
Heat Pumps
Evaporators and condensers for air-water, water-water and geothermal heat pumps, with the low internal volume that refrigerant charge limits demand.
HIU & Hydronic Modules
Compact, drop-in BPHE for heat interface units and hybrid integration kits, where the module frame sets the footprint.
DHW
Exchangers for domestic hot water from boilers, heat pumps or district heating, with or without technical storage.
District Heating
Substation exchangers that separate the primary network from the building system for heating, hot water and district cooling, efficient even at low LMTD.
Gas Boilers
Domestic hot water exchangers for wall-hung boilers and cascade systems: compact footprint and scaling resistance.
→ Production capacity and interchangeability
Reliable lead times, flexible quantities, samples on request.
Our production is now entirely in Italy, with available production capacity and short lead times, for both series production and samples, so you can validate quickly.
Producing and shipping now
Capacity available to take on new orders with no waiting list.
Reliable delivery dates
A date committed in the quotation that you can plan your production around.
Small and large orders
A dedicated small-batch line works alongside series production.
Solutions built on your design
Custom variants when the standard configuration isn’t enough.
Samples on request
Test it on your unit before moving to production.
→ Same footprint
Change supplier, not your project.
Several Davhex series are designed with footprints and connections matched to the most common formats on the market: same space, same connections, no changes to piping or brackets.
Series AB
Designed for integration on existing platforms: DHW modules, HIUs and economizers. 20 mm connections.
Series C
1″ connections for DHW and condensers, with Low or High geometry on the same platform.
Series F
1¼″ connections, for mid-size heat pumps and chillers.
→ Check interchangeability
Looking for an alternative to your current supplier?
Tell us the manufacturer, model and plate count of the heat exchanger you use today: we’ll check dimensional compatibility and propose the Davhex equivalent.
→ The role of the BPHE
A different function in every machine.
The same component changes job depending on the machine it works in: evaporator, condenser, economizer or liquid-to-liquid interface. Each role has its own design criticality — and that is where efficiency is decided.
| Function | Where | Design criticality |
|---|---|---|
| Evaporator | Water-to-water chillers / heat pumps | Two-phase refrigerant distribution; superheat control |
| Condenser | Chillers / heat pumps in heating mode | Desuperheating, condensation and subcooling in a single component |
| Economizer | Screw chillers, VRF | Increases cooling capacity without increasing displacement |
| Liquid-to-liquid | Boilers, DHW, substations | Efficiency at reduced LMTD; scaling resistance |
→ Range coverage
One size for every need.
From the residential heat pump to the district heating substation: whatever the operating point, the range has a configuration to cover it.
| # | Parameter | Davhex range | Note |
|---|---|---|---|
| 01 | Power | 3 – 500 kW | From residential to large installations |
| 02 | Operating pressure | up to 49 bar | |
| 03 | Number of plates | up to 300 | Depending on the model |
| 04 | Operating temperature | −196 / +200 °C | |
| 05 | Connections | 20 mm – 2½″ |
→ The Davhex solution
The right geometry for every specification.
High efficiency and low pressure drop pull in opposite directions: the balance lies in the plate geometry. That’s why every heat exchanger is configured on your operating point, not picked from a catalog on kW alone.
High Heat Transfer
High chevron angle. More turbulence, higher heat transfer coefficient. Right when the required approach is tight (<3 K).
Low Pressure Drop
Low chevron angle. Reduces pressure drop. Preferable when the pumping budget is the dominant constraint.
Mixed Geometry
Mixed H/L plates. Fine-tunes the trade-off between heat transfer and pressure drop without changing size.
→ The Polidoro advantage
Eighty years of burners. Now in the heat exchanger.
Davhex was born from the R&D center that has been developing burners and combustion systems for boilers and heat pumps since the very beginning. We know these machines from the other side: not only as suppliers of a component, but as designers of the generator in which that component has to work. That is why we talk about system conditions, not just datasheets.
80
years of thermal components
Made in Italy
Designed in our Schio headquarters
Available
production capacity
In-house R&D center
CFD simulation and thermal validation
Dedicated test rooms
Performance and life testing
OEM co-development
Custom variants, European supply chain
Tell us about your project
Working on an HVAC project?
Tell us what you’re working on: one of our engineers will reply with a proposal sized on your operating point.
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