HAVA 340H MVHR
Horizontally Mounted Heat Recovery Ventilation Unit
Whole-house heat recovery unit, suitable for ceiling or false-ceiling installation, for horizontal mounting.
Improves indoor Air Quality
Better health for the building and its occupants. Find out more

Helps tackle the causes of condensation and mould.

Supplied with a multi-function LCD Display control panel for control and convenience.

Very low running costs and also helps save on heating costs through thermal recovery.

PCDB and SAP Q listed, ensuring product performance is accurately recorded underpinning compliance with Building regulations.
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Email or call the team on 01384 275771
Want to know the cost of using this fan? Put your rate in our running cost calculator.
The HAVA 340H is a mechanical ventilation and heat recovery unit delivering balanced supply and extract ventilation for dwelling applications. It features advanced EC brushless motor technology, a highly efficient counterflow heat exchanger to maximise thermal recovery, an LCD Display control unit with Modbus-enabled controls to enhance user comfort, simplify operation, and integrate seamlessly with wider building management systems.
The HAVA 340H is an ideal solution for improving indoor air quality, reducing CO₂ levels, and helping prevent condensation and mould, protecting both the building and occupant health.
Its slim, low-profile design allows for in-line ceiling, and false-ceiling installation, making it suitable for a wide range of residential settings. The unit uses a high-efficiency heat exchanger to recover heat from the extract air, transferring this energy to the incoming air to maintain a comfortable indoor environment with reduced energy demand.
Quiet operation makes the HAVA 340H perfectly suited for installation in residential dwellings.
Features and Benefits
-
Easy to install due to the 290mm height (315mm max., including fixing brackets and drain connection) to overcome shallow ceiling voids.
- Simplified electric wiring due to being supplied pre-cabled for easy connection with Remote multifunctional controller, suitable for wall installation, provided with touch buttons to select functionalities and LCD Display for monitoring of the operation and alarms of the unit.
- Quick change ISO Coarse 60% (G4) filters easily removable for cleaning with no need to remove the access panel. ISO ePM1 60% filter (F7) on request.
- Automatic anti-frost protection to prevent frost building up on the exhaust side of the heat exchanger.
- Integral automatic bypass for free cooling during the summer season with two drainage holes to meet climate requirements.
Specification
- LCD Display Multifunction controller, with tough buttons to select functionalities.
- Outer panels manufactured from powder coated galvanised sheet steel finished in white RAL 9010 with main internal body manufactured from EPP (expanded polypropylene) providing reduced sound emissions, maximised air tightness and thermal insulation.
- Backward curved centrifugal impellers are dynamically balanced and directly driven by the EC motors to provide a smooth airflow through the unit.
- The unit is designed for continuous running with highly efficient EC motors, with integral thermal protection and sealed for life high quality ball bearings.
- Highly efficient counterflow heat exchanger to maximise thermal recovery and fitted with ISO Coarse 60% (G4) filters as standard.
- IPX4 protection degree.
Tested
- Units are tested in our TÜV Rheinland accredited internal laboratory according to the operating document IEC OD 2048 (level CTF1) for the IEC 60335-1 and IEC 60335-2-80 Standards, providing accurate, up to date information on electrical safety, performance and noise. PCDB and SAP Q listed underpinning compliance with Building regulations.
Bespoke Design Service
We offer a fully bespoke design service for our MVHR Systems.
Get in touch to find out more.

Model | Max Airflow L/s* | Max Power W | Volts | Max Ambient Temp. °C | Filters | Max floor area m²** |
---|---|---|---|---|---|---|
1. HAVA 120HV | 26 | 56 | 220-240 | 40 | ISO Coarse | 87 |
2. HAVA 180H | 50 | 105 | 220-240 | 40 | ISO Coarse | 167 |
3. HAVA 280V | 75 | 178 | 220-240 | 40 | ISO ePM10 50% | 250 |
4. HAVA 340H | 84 | 170 | 220-240 | 40 | ISO Coarse | 280 |
5. HAVA 400V | 101 | 160 | 220-240 | 40 | ISO Coarse | 337 |
6. HAVA 550V | 145 | 333 | 220-240 | 40 | ISO Coarse | 484 |
*Maximum Airflow @0Pa.
**Maximum floor area is based on 0.3l/s/m. Reference data at 100Pa, Approved document Part F, V1: Dwellings must be adhered to.
Each HAVA MVHR unit has a 5-Year parts-only warranty (First year Parts & labour). For full details and if you need to claim, check here.
Accessories
Internal Air Valves
Standard round metal white coated exhaust valve in 3 sizes
Controls
Perfect for rooms and areas that are prone to high moisture and condensation