HAVA 340H - Horizontally Mounted Heat Recovery Ventilation Unit

HAVA 340H — Horizontally Mounted Mechanical Ventilation with Heat Recovery Unit (MVHR)

The HAVA 340H is a Mechanical Ventilation with Heat Recovery (MVHR) unit that simultaneously extracts air from ‘wet’ rooms while supplying new, filtered air to the ‘habitable’ areas of a dwelling. Designed for horizontal installation, it helps prevent condensation and mould, enhances indoor air quality, and reduces heating costs through efficient thermal recovery.

Product Overview

Compact and powerful, the HAVA 340H provides high airflow performance with very low running costs. It is PCDB and SAP Q listed to ensure verified energy performance and compliance with Building Regulations. The unit includes a multi-function LCD wall controller for simple operation and monitoring, as well as automatic frost protection and an integral summer bypass with dual condensate drains. Constructed from durable EPP and metal casework, it offers long-lasting, quiet, and efficient performance.

Key Features and Benefits

• Compact horizontal design: Ideal for ceiling void or loft installations where space is limited.
• Filter maintenance made easy: Quick-change ISO Coarse 60% (G4) filters supplied as standard; ISO ePM1 60% (F7) filters available on request.
• Automatic frost and summer bypass: Dual condensate drains maintain performance and efficiency all year round.
• Durable construction: EPP housing with metal casework provides strength, insulation, and longevity.
• LCD control interface: Wall-mounted controller with touch buttons for operation modes and alarm monitoring.

SAP/PCDB Performance Data

• Kitchen + 1 additional wet room: Supply +12% | Extract 14% → 15.0 L/s, SFP 0.72 W/(L/s), Efficiency 91%.
• Kitchen + 2 additional wet rooms: Supply +5% | Extract 19% → 21.0 L/s, SFP 0.71 W/(L/s), Efficiency 90%.
• Kitchen + 3 additional wet rooms: Supply +12% | Extract 14% → 27.0 L/s, SFP 0.75 W/(L/s), Efficiency 88%.
• Kitchen + 4 additional wet rooms: Supply +12% | Extract 14% → 33.0 L/s, SFP 0.88 W/(L/s), Efficiency 87%.
• Kitchen + 5 additional wet rooms: Supply +12% | Extract 14% → 39.0 L/s, SFP 0.97 W/(L/s), Efficiency 86%.
• Kitchen + 6 additional wet rooms: Supply +12% | Extract 14% → 45.0 L/s, SFP 1.16 W/(L/s), Efficiency 84%.
• Kitchen + 7 additional wet rooms: Supply +12% | Extract 14% → 51.0 L/s, SFP 1.36 W/(L/s), Efficiency 83%.

Technical Specifications

• Airflow: Up to 100 L/s (@ 100 Pa; 83 L/s typical).
• Power (max): 170 W.
• Sound level: 22 dB(A) @ 3 m breakout (comparative only; normal speed 40%).
• Ambient temperature (max): 40 °C.
• Controls: LCD multi-function wall controller with touch buttons and status display.
• Construction: EPP body with metal casework.
• Condensate drainage: Two Ø16 mm outlets for summer and winter drainage.
• Weight: 23.5 kg.

Quality and Compliance

• PCDB and SAP Q listed to support Building Regulations compliance.
• Designed and manufactured in accordance with BS EN ISO 9001, tested to ISO 5801 (airside performance) and BS ISO 13347-1 (sound performance).

Warranty

Each HAVA 340H unit is supplied with a 5-year manufacturer’s warranty, providing long-term reliability and peace of mind.

	Product Data, Performance & Dimension Sheet – Learn more about the airflow performance, power consumption, efficiency ratings and dimensional details of the HAVA 340V MVHR unit. This document provides full technical data for accurate specification and installation planning. Click here to download the full data, performance and dimension sheet.
	Installation, Maintenance & User Guide – Learn how to correctly install, commission and maintain your HAVA 340V MVHR unit. This guide includes wiring information, filter replacement steps, operational guidance and essential maintenance procedures. Click here to download the full installation, maintenance and user guide.

Looking to specify or purchase? Explore our full range of heat recovery ventilation units or contact Buy Ventilation for expert guidance on selecting the right system for your project.