Vectaire Midi MVHR Whole House Ventilation with Heat Recovery Unit
The Vectaire Midi is a whole-house mechanical ventilation with heat recovery (MVHR) unit engineered for residential properties up to 170 m². Manufactured in the UK, it delivers up to 94% heat exchange efficiency — one of the highest in its class — while drawing as little as 2.2 W at minimum speed. Whether you are building new or retrofitting, the Midi provides continuous fresh, filtered air throughout your home, recovering the warmth from stale outgoing air before it is exhausted, keeping energy bills low and indoor air quality high all year round.
The Midi uses a counter-flow heat exchanger that achieves up to 94% thermal efficiency — recovering warmth from stale exhaust air and transferring it to the incoming fresh supply without the two airstreams ever mixing. This dramatically reduces the heating energy needed to bring incoming air up to room temperature.
When outdoor temperatures are pleasant, the automatic summer bypass routes incoming air around the heat exchanger entirely, bringing cooler fresh air directly into the home. The bypass activates and deactivates automatically based on adjustable internal and external temperature setpoints — no manual intervention needed.
The integral frost-stat proportionally reduces the intake motor speed as outside temperatures fall between +3°C and −8°C, preventing ice formation on the heat exchanger core. This is a standard feature, protecting the unit and maintaining safe operation through UK winters without requiring an additional external controller.
Fitted with electronically commutated (EC) brushless motors with forward curved impellers and direct drive, the Midi draws just 2.2 W at 20% speed and 120 W at full speed. The specific fan power (SFP) is as low as 0.50 W/l/s, comfortably meeting Building Regulations targets for energy-efficient ventilation.
Each motor has independent variable speed adjustment for trickle, boost, and purge modes, set at installation to match the specific ductwork design. Boost speed can be triggered by a 230V switched live from a light switch, remote humidistat (DRH240), PIR sensor (PIRFF), thermostat (THM), or pull cord. The boost over-run timer is adjustable from 0 to 90 minutes.
The compact steel casing is lined with thermo-acoustic insulation, providing both noise attenuation and thermal performance. At 80% speed (79 l/s) the breakout sound pressure is just 29.9 dBA at 3 m, making the Midi suitable for installation in lofts, cupboards, or utility rooms adjacent to living spaces. The unit weighs 24 kg.
Designed for vertical installation in lofts or cupboards, with a wall fixing bracket supplied. The universal handing models (without humidistat) can be orientated left or right on site, giving installers flexibility. The unit can also accommodate 0-10V connections for BMS integration, CO₂ detectors, or home automation systems — factory-set options available.
Standard disposable G3 filters are easily accessible for routine maintenance. The unit records run-time and power outage counters downloadable via QR code, making service visits straightforward. Optional integral LCD or remote LCD commissioning units are available for accurate airflow balancing at installation.
| Max Airflow Capacity | 101 l/s (364 m³/hr) |
| Airflow at 50Pa | 95 l/s |
| Heat Exchange Efficiency (max) | 94% (SAP 10: Kitchen + 1 wet room) |
| Specific Fan Power (SFP) | Down to 0.50 W/l/s |
| Total Power — 100% / 20% | 120 W / 2.2 W |
| Operating Current | 1.21 A |
| Airflow Speeds (l/s) | 101 / 79 / 58 / 36 / 14 (100–20%) |
| Breakout Sound Pressure @ 3m | 33.9 dBA @ 100% · 19.7 dBA @ 20% |
| Max Operating Temperature | 60°C |
| Frost-Stat Activation Range | +3°C to −8°C (outside temperature) |
| Boost Over-Run Timer | 0–90 minutes (adjustable) |
| Remote Purge Timer (optional) | 0–250 minutes (factory preset: 15 min) |
| Filter Grade | G3 (disposable, easily accessible) |
| Dimensions (W × H × D) | 600 × 555 × 382 mm (approx) |
| Weight | 24 kg |
| Duct Connection Diameter | Ø125 mm (four spigots) |
| Casing | Steel sheet, epoxy paint finish |
| Heat Exchanger Type | Counter-flow |
| Motor Type | EC brushless, direct drive, forward curved impellers |
| Supply Voltage | 230V AC |
| Warranty | 5 years (1 year parts & labour, 4 years parts only) |
| Certifications | SAP PCDB Listed · CE Marked · ISO 9001:2015 · ISO 14001:2015 · EU RoHS · IEC60335-2-80 |
| Suitable For | Any domestic wet room installation |
| Sound Testing Standard | BS EN ISO 3743-1:2010 (independently tested) |
- WHHR-Midi/BY — Bypass, universal handing
- WHHR-Midi/LBYH — Bypass, left drain, humidistat
- WHHR-Midi/RBYH — Bypass, right drain, humidistat
- Midi-BY+LCD — Bypass, universal, integral LCD commissioning unit
- Midi-BY+LCDLH — Bypass, integral LCD, left drain, humidistat
- Midi-BY+LCDRH — Bypass, integral LCD, right drain, humidistat
Original: $3,075.90
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Vectaire Midi MVHR Whole House Ventilation with Heat Recovery Unit
The Vectaire Midi is a whole-house mechanical ventilation with heat recovery (MVHR) unit engineered for residential properties up to 170 m². Manufactured in the UK, it delivers up to 94% heat exchange efficiency — one of the highest in its class — while drawing as little as 2.2 W at minimum speed. Whether you are building new or retrofitting, the Midi provides continuous fresh, filtered air throughout your home, recovering the warmth from stale outgoing air before it is exhausted, keeping energy bills low and indoor air quality high all year round.
The Midi uses a counter-flow heat exchanger that achieves up to 94% thermal efficiency — recovering warmth from stale exhaust air and transferring it to the incoming fresh supply without the two airstreams ever mixing. This dramatically reduces the heating energy needed to bring incoming air up to room temperature.
When outdoor temperatures are pleasant, the automatic summer bypass routes incoming air around the heat exchanger entirely, bringing cooler fresh air directly into the home. The bypass activates and deactivates automatically based on adjustable internal and external temperature setpoints — no manual intervention needed.
The integral frost-stat proportionally reduces the intake motor speed as outside temperatures fall between +3°C and −8°C, preventing ice formation on the heat exchanger core. This is a standard feature, protecting the unit and maintaining safe operation through UK winters without requiring an additional external controller.
Fitted with electronically commutated (EC) brushless motors with forward curved impellers and direct drive, the Midi draws just 2.2 W at 20% speed and 120 W at full speed. The specific fan power (SFP) is as low as 0.50 W/l/s, comfortably meeting Building Regulations targets for energy-efficient ventilation.
Each motor has independent variable speed adjustment for trickle, boost, and purge modes, set at installation to match the specific ductwork design. Boost speed can be triggered by a 230V switched live from a light switch, remote humidistat (DRH240), PIR sensor (PIRFF), thermostat (THM), or pull cord. The boost over-run timer is adjustable from 0 to 90 minutes.
The compact steel casing is lined with thermo-acoustic insulation, providing both noise attenuation and thermal performance. At 80% speed (79 l/s) the breakout sound pressure is just 29.9 dBA at 3 m, making the Midi suitable for installation in lofts, cupboards, or utility rooms adjacent to living spaces. The unit weighs 24 kg.
Designed for vertical installation in lofts or cupboards, with a wall fixing bracket supplied. The universal handing models (without humidistat) can be orientated left or right on site, giving installers flexibility. The unit can also accommodate 0-10V connections for BMS integration, CO₂ detectors, or home automation systems — factory-set options available.
Standard disposable G3 filters are easily accessible for routine maintenance. The unit records run-time and power outage counters downloadable via QR code, making service visits straightforward. Optional integral LCD or remote LCD commissioning units are available for accurate airflow balancing at installation.
| Max Airflow Capacity | 101 l/s (364 m³/hr) |
| Airflow at 50Pa | 95 l/s |
| Heat Exchange Efficiency (max) | 94% (SAP 10: Kitchen + 1 wet room) |
| Specific Fan Power (SFP) | Down to 0.50 W/l/s |
| Total Power — 100% / 20% | 120 W / 2.2 W |
| Operating Current | 1.21 A |
| Airflow Speeds (l/s) | 101 / 79 / 58 / 36 / 14 (100–20%) |
| Breakout Sound Pressure @ 3m | 33.9 dBA @ 100% · 19.7 dBA @ 20% |
| Max Operating Temperature | 60°C |
| Frost-Stat Activation Range | +3°C to −8°C (outside temperature) |
| Boost Over-Run Timer | 0–90 minutes (adjustable) |
| Remote Purge Timer (optional) | 0–250 minutes (factory preset: 15 min) |
| Filter Grade | G3 (disposable, easily accessible) |
| Dimensions (W × H × D) | 600 × 555 × 382 mm (approx) |
| Weight | 24 kg |
| Duct Connection Diameter | Ø125 mm (four spigots) |
| Casing | Steel sheet, epoxy paint finish |
| Heat Exchanger Type | Counter-flow |
| Motor Type | EC brushless, direct drive, forward curved impellers |
| Supply Voltage | 230V AC |
| Warranty | 5 years (1 year parts & labour, 4 years parts only) |
| Certifications | SAP PCDB Listed · CE Marked · ISO 9001:2015 · ISO 14001:2015 · EU RoHS · IEC60335-2-80 |
| Suitable For | Any domestic wet room installation |
| Sound Testing Standard | BS EN ISO 3743-1:2010 (independently tested) |
- WHHR-Midi/BY — Bypass, universal handing
- WHHR-Midi/LBYH — Bypass, left drain, humidistat
- WHHR-Midi/RBYH — Bypass, right drain, humidistat
- Midi-BY+LCD — Bypass, universal, integral LCD commissioning unit
- Midi-BY+LCDLH — Bypass, integral LCD, left drain, humidistat
- Midi-BY+LCDRH — Bypass, integral LCD, right drain, humidistat
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Description
The Vectaire Midi is a whole-house mechanical ventilation with heat recovery (MVHR) unit engineered for residential properties up to 170 m². Manufactured in the UK, it delivers up to 94% heat exchange efficiency — one of the highest in its class — while drawing as little as 2.2 W at minimum speed. Whether you are building new or retrofitting, the Midi provides continuous fresh, filtered air throughout your home, recovering the warmth from stale outgoing air before it is exhausted, keeping energy bills low and indoor air quality high all year round.
The Midi uses a counter-flow heat exchanger that achieves up to 94% thermal efficiency — recovering warmth from stale exhaust air and transferring it to the incoming fresh supply without the two airstreams ever mixing. This dramatically reduces the heating energy needed to bring incoming air up to room temperature.
When outdoor temperatures are pleasant, the automatic summer bypass routes incoming air around the heat exchanger entirely, bringing cooler fresh air directly into the home. The bypass activates and deactivates automatically based on adjustable internal and external temperature setpoints — no manual intervention needed.
The integral frost-stat proportionally reduces the intake motor speed as outside temperatures fall between +3°C and −8°C, preventing ice formation on the heat exchanger core. This is a standard feature, protecting the unit and maintaining safe operation through UK winters without requiring an additional external controller.
Fitted with electronically commutated (EC) brushless motors with forward curved impellers and direct drive, the Midi draws just 2.2 W at 20% speed and 120 W at full speed. The specific fan power (SFP) is as low as 0.50 W/l/s, comfortably meeting Building Regulations targets for energy-efficient ventilation.
Each motor has independent variable speed adjustment for trickle, boost, and purge modes, set at installation to match the specific ductwork design. Boost speed can be triggered by a 230V switched live from a light switch, remote humidistat (DRH240), PIR sensor (PIRFF), thermostat (THM), or pull cord. The boost over-run timer is adjustable from 0 to 90 minutes.
The compact steel casing is lined with thermo-acoustic insulation, providing both noise attenuation and thermal performance. At 80% speed (79 l/s) the breakout sound pressure is just 29.9 dBA at 3 m, making the Midi suitable for installation in lofts, cupboards, or utility rooms adjacent to living spaces. The unit weighs 24 kg.
Designed for vertical installation in lofts or cupboards, with a wall fixing bracket supplied. The universal handing models (without humidistat) can be orientated left or right on site, giving installers flexibility. The unit can also accommodate 0-10V connections for BMS integration, CO₂ detectors, or home automation systems — factory-set options available.
Standard disposable G3 filters are easily accessible for routine maintenance. The unit records run-time and power outage counters downloadable via QR code, making service visits straightforward. Optional integral LCD or remote LCD commissioning units are available for accurate airflow balancing at installation.
| Max Airflow Capacity | 101 l/s (364 m³/hr) |
| Airflow at 50Pa | 95 l/s |
| Heat Exchange Efficiency (max) | 94% (SAP 10: Kitchen + 1 wet room) |
| Specific Fan Power (SFP) | Down to 0.50 W/l/s |
| Total Power — 100% / 20% | 120 W / 2.2 W |
| Operating Current | 1.21 A |
| Airflow Speeds (l/s) | 101 / 79 / 58 / 36 / 14 (100–20%) |
| Breakout Sound Pressure @ 3m | 33.9 dBA @ 100% · 19.7 dBA @ 20% |
| Max Operating Temperature | 60°C |
| Frost-Stat Activation Range | +3°C to −8°C (outside temperature) |
| Boost Over-Run Timer | 0–90 minutes (adjustable) |
| Remote Purge Timer (optional) | 0–250 minutes (factory preset: 15 min) |
| Filter Grade | G3 (disposable, easily accessible) |
| Dimensions (W × H × D) | 600 × 555 × 382 mm (approx) |
| Weight | 24 kg |
| Duct Connection Diameter | Ø125 mm (four spigots) |
| Casing | Steel sheet, epoxy paint finish |
| Heat Exchanger Type | Counter-flow |
| Motor Type | EC brushless, direct drive, forward curved impellers |
| Supply Voltage | 230V AC |
| Warranty | 5 years (1 year parts & labour, 4 years parts only) |
| Certifications | SAP PCDB Listed · CE Marked · ISO 9001:2015 · ISO 14001:2015 · EU RoHS · IEC60335-2-80 |
| Suitable For | Any domestic wet room installation |
| Sound Testing Standard | BS EN ISO 3743-1:2010 (independently tested) |
- WHHR-Midi/BY — Bypass, universal handing
- WHHR-Midi/LBYH — Bypass, left drain, humidistat
- WHHR-Midi/RBYH — Bypass, right drain, humidistat
- Midi-BY+LCD — Bypass, universal, integral LCD commissioning unit
- Midi-BY+LCDLH — Bypass, integral LCD, left drain, humidistat
- Midi-BY+LCDRH — Bypass, integral LCD, right drain, humidistat
