Vectaire Maxi Plus BY MVHR Whole House Ventilation with Heat Recovery Unit
The Vectaire Maxi is a whole-house MVHR (Mechanical Ventilation with Heat Recovery) system designed for residential properties up to 250 m². UK-manufactured to ISO 9001:2015 and 14001:2015, it achieves up to 92% heat exchange efficiency with a peak airflow of 177 l/s and a minimum specific fan power of just 0.40 W/l/s — among the most efficient values available for a unit of this capacity. The Maxi continuously extracts stale, humid air from wet rooms and replaces it with fresh, filtered, pre-warmed air, eliminating condensation and pollutants while slashing ventilation heat losses. It is SAP PCDB Listed and fully compliant with UK Building Regulations Part F and Part L.
The Maxi's counter-flow heat exchanger reaches up to 92% thermal efficiency, capturing heat from warm stale air and transferring it directly to the incoming fresh supply. At a kitchen plus one wet room configuration under SAP 10, the exchanger delivers 92% efficiency at 0.45 W/l/s SFP — meeting the most demanding energy performance targets.
The automatic summer bypass monitors internal and external temperatures and diverts fresh incoming air around the heat exchanger when outdoor conditions are cool enough to provide natural cooling. Setpoints are fully adjustable at commissioning. The bypass operates without user intervention, ensuring comfortable temperatures year-round.
The built-in frost-stat proportionally reduces the intake fan speed as the external temperature falls between +3°C and −8°C, protecting the heat exchanger from icing and maintaining balanced operation throughout winter. This is a standard feature — no separate frost protection controller is required.
High-quality EC brushless motors with forward curved impellers and direct drive deliver efficient, quiet airflow across five speed steps. At 100% (177 l/s) the unit draws just 176 W; at 20% (23 l/s) it uses only 4 W. Breakout sound pressure at 3 m is 38.1 dBA at 100% and 20.2 dBA at 20% — independently tested to BS EN ISO 3743-1:2010.
Each motor has independently adjustable trickle, boost, and purge speeds set during commissioning to match the specific ductwork installation. Boost is activated via 230V switched live from a light switch, remote humidistat (DRH240), PIR (PIRFF), thermostat (THM), or pull cord. The adjustable over-run timer runs from 0 to 90 minutes; purge over-run from 0 to 250 minutes.
The steel casing incorporates EPS (expanded polystyrene) internal components and foam construction lining, providing both acoustic dampening and thermal insulation around the heat exchanger core. This reduces heat loss from the unit body and keeps in-duct noise transmission low. The epoxy paint finish ensures a durable, clean appearance in any utility or loft space.
Factory-set options include 0-10V connections for BMS integration, CO₂ detection, and home automation; a relay for an external pre-heater; a 3-speed selector switch; integral humidistat; and holiday mode (default: 50% trickle speed when unoccupied). Run-time and power outage counters are downloadable via QR code, aiding planned preventive maintenance.
The Maxi is designed for seamless integration with the Vectaire Cool Breeze active cooling module. The Cool Breeze attaches directly to the Maxi's supply air path and uses R290 natural refrigerant to lower incoming supply air by up to 20°C, delivering up to 4.1 kW of cooling capacity without an external condenser. This combination satisfies CIBSE TM59 and Approved Document O requirements for overheating mitigation.
| Max Airflow Capacity | 177 l/s (637 m³/hr) |
| Airflow at 50Pa | 163 l/s |
| Heat Exchange Efficiency (max) | 92% (SAP 10: Kitchen + 1 wet room) |
| Specific Fan Power (SFP) | Down to 0.40 W/l/s |
| Total Power — 100% / 20% | 176 W / 4 W |
| Operating Current | 1.41 A |
| Airflow Speeds (l/s) | 177 / 138 / 99 / 60 / 23 (100–20%) |
| Breakout Sound Pressure @ 3m | 38.1 dBA @ 100% · 20.2 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) | 758 × 727 × 649 mm (incl. spigots) |
| Weight | 37 kg |
| Duct Connection Diameter | Ø149 mm (four spigots) |
| Casing | Steel sheet, epoxy paint finish, EPS lining, foam construction |
| 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 |
| Sound Testing Standard | BS EN ISO 3743-1:2010 (independently tested) |
- WHHR Maxi/BY — Bypass, universal handing
- WHHR Maxi/BLH — Bypass, left drain, humidistat
- WHHR Maxi/BRH — Bypass, right drain, humidistat
- Maxi BY+LCD — Bypass, universal, integral LCD commissioning unit
- Maxi+LHHLCD — Bypass, left drain, humidistat, integral LCD
- Maxi+RHHLCD — Bypass, right drain, humidistat, integral LCD
Original: $4,779.18
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Vectaire Maxi Plus BY MVHR Whole House Ventilation with Heat Recovery Unit
The Vectaire Maxi is a whole-house MVHR (Mechanical Ventilation with Heat Recovery) system designed for residential properties up to 250 m². UK-manufactured to ISO 9001:2015 and 14001:2015, it achieves up to 92% heat exchange efficiency with a peak airflow of 177 l/s and a minimum specific fan power of just 0.40 W/l/s — among the most efficient values available for a unit of this capacity. The Maxi continuously extracts stale, humid air from wet rooms and replaces it with fresh, filtered, pre-warmed air, eliminating condensation and pollutants while slashing ventilation heat losses. It is SAP PCDB Listed and fully compliant with UK Building Regulations Part F and Part L.
The Maxi's counter-flow heat exchanger reaches up to 92% thermal efficiency, capturing heat from warm stale air and transferring it directly to the incoming fresh supply. At a kitchen plus one wet room configuration under SAP 10, the exchanger delivers 92% efficiency at 0.45 W/l/s SFP — meeting the most demanding energy performance targets.
The automatic summer bypass monitors internal and external temperatures and diverts fresh incoming air around the heat exchanger when outdoor conditions are cool enough to provide natural cooling. Setpoints are fully adjustable at commissioning. The bypass operates without user intervention, ensuring comfortable temperatures year-round.
The built-in frost-stat proportionally reduces the intake fan speed as the external temperature falls between +3°C and −8°C, protecting the heat exchanger from icing and maintaining balanced operation throughout winter. This is a standard feature — no separate frost protection controller is required.
High-quality EC brushless motors with forward curved impellers and direct drive deliver efficient, quiet airflow across five speed steps. At 100% (177 l/s) the unit draws just 176 W; at 20% (23 l/s) it uses only 4 W. Breakout sound pressure at 3 m is 38.1 dBA at 100% and 20.2 dBA at 20% — independently tested to BS EN ISO 3743-1:2010.
Each motor has independently adjustable trickle, boost, and purge speeds set during commissioning to match the specific ductwork installation. Boost is activated via 230V switched live from a light switch, remote humidistat (DRH240), PIR (PIRFF), thermostat (THM), or pull cord. The adjustable over-run timer runs from 0 to 90 minutes; purge over-run from 0 to 250 minutes.
The steel casing incorporates EPS (expanded polystyrene) internal components and foam construction lining, providing both acoustic dampening and thermal insulation around the heat exchanger core. This reduces heat loss from the unit body and keeps in-duct noise transmission low. The epoxy paint finish ensures a durable, clean appearance in any utility or loft space.
Factory-set options include 0-10V connections for BMS integration, CO₂ detection, and home automation; a relay for an external pre-heater; a 3-speed selector switch; integral humidistat; and holiday mode (default: 50% trickle speed when unoccupied). Run-time and power outage counters are downloadable via QR code, aiding planned preventive maintenance.
The Maxi is designed for seamless integration with the Vectaire Cool Breeze active cooling module. The Cool Breeze attaches directly to the Maxi's supply air path and uses R290 natural refrigerant to lower incoming supply air by up to 20°C, delivering up to 4.1 kW of cooling capacity without an external condenser. This combination satisfies CIBSE TM59 and Approved Document O requirements for overheating mitigation.
| Max Airflow Capacity | 177 l/s (637 m³/hr) |
| Airflow at 50Pa | 163 l/s |
| Heat Exchange Efficiency (max) | 92% (SAP 10: Kitchen + 1 wet room) |
| Specific Fan Power (SFP) | Down to 0.40 W/l/s |
| Total Power — 100% / 20% | 176 W / 4 W |
| Operating Current | 1.41 A |
| Airflow Speeds (l/s) | 177 / 138 / 99 / 60 / 23 (100–20%) |
| Breakout Sound Pressure @ 3m | 38.1 dBA @ 100% · 20.2 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) | 758 × 727 × 649 mm (incl. spigots) |
| Weight | 37 kg |
| Duct Connection Diameter | Ø149 mm (four spigots) |
| Casing | Steel sheet, epoxy paint finish, EPS lining, foam construction |
| 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 |
| Sound Testing Standard | BS EN ISO 3743-1:2010 (independently tested) |
- WHHR Maxi/BY — Bypass, universal handing
- WHHR Maxi/BLH — Bypass, left drain, humidistat
- WHHR Maxi/BRH — Bypass, right drain, humidistat
- Maxi BY+LCD — Bypass, universal, integral LCD commissioning unit
- Maxi+LHHLCD — Bypass, left drain, humidistat, integral LCD
- Maxi+RHHLCD — Bypass, right drain, humidistat, integral LCD
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Description
The Vectaire Maxi is a whole-house MVHR (Mechanical Ventilation with Heat Recovery) system designed for residential properties up to 250 m². UK-manufactured to ISO 9001:2015 and 14001:2015, it achieves up to 92% heat exchange efficiency with a peak airflow of 177 l/s and a minimum specific fan power of just 0.40 W/l/s — among the most efficient values available for a unit of this capacity. The Maxi continuously extracts stale, humid air from wet rooms and replaces it with fresh, filtered, pre-warmed air, eliminating condensation and pollutants while slashing ventilation heat losses. It is SAP PCDB Listed and fully compliant with UK Building Regulations Part F and Part L.
The Maxi's counter-flow heat exchanger reaches up to 92% thermal efficiency, capturing heat from warm stale air and transferring it directly to the incoming fresh supply. At a kitchen plus one wet room configuration under SAP 10, the exchanger delivers 92% efficiency at 0.45 W/l/s SFP — meeting the most demanding energy performance targets.
The automatic summer bypass monitors internal and external temperatures and diverts fresh incoming air around the heat exchanger when outdoor conditions are cool enough to provide natural cooling. Setpoints are fully adjustable at commissioning. The bypass operates without user intervention, ensuring comfortable temperatures year-round.
The built-in frost-stat proportionally reduces the intake fan speed as the external temperature falls between +3°C and −8°C, protecting the heat exchanger from icing and maintaining balanced operation throughout winter. This is a standard feature — no separate frost protection controller is required.
High-quality EC brushless motors with forward curved impellers and direct drive deliver efficient, quiet airflow across five speed steps. At 100% (177 l/s) the unit draws just 176 W; at 20% (23 l/s) it uses only 4 W. Breakout sound pressure at 3 m is 38.1 dBA at 100% and 20.2 dBA at 20% — independently tested to BS EN ISO 3743-1:2010.
Each motor has independently adjustable trickle, boost, and purge speeds set during commissioning to match the specific ductwork installation. Boost is activated via 230V switched live from a light switch, remote humidistat (DRH240), PIR (PIRFF), thermostat (THM), or pull cord. The adjustable over-run timer runs from 0 to 90 minutes; purge over-run from 0 to 250 minutes.
The steel casing incorporates EPS (expanded polystyrene) internal components and foam construction lining, providing both acoustic dampening and thermal insulation around the heat exchanger core. This reduces heat loss from the unit body and keeps in-duct noise transmission low. The epoxy paint finish ensures a durable, clean appearance in any utility or loft space.
Factory-set options include 0-10V connections for BMS integration, CO₂ detection, and home automation; a relay for an external pre-heater; a 3-speed selector switch; integral humidistat; and holiday mode (default: 50% trickle speed when unoccupied). Run-time and power outage counters are downloadable via QR code, aiding planned preventive maintenance.
The Maxi is designed for seamless integration with the Vectaire Cool Breeze active cooling module. The Cool Breeze attaches directly to the Maxi's supply air path and uses R290 natural refrigerant to lower incoming supply air by up to 20°C, delivering up to 4.1 kW of cooling capacity without an external condenser. This combination satisfies CIBSE TM59 and Approved Document O requirements for overheating mitigation.
| Max Airflow Capacity | 177 l/s (637 m³/hr) |
| Airflow at 50Pa | 163 l/s |
| Heat Exchange Efficiency (max) | 92% (SAP 10: Kitchen + 1 wet room) |
| Specific Fan Power (SFP) | Down to 0.40 W/l/s |
| Total Power — 100% / 20% | 176 W / 4 W |
| Operating Current | 1.41 A |
| Airflow Speeds (l/s) | 177 / 138 / 99 / 60 / 23 (100–20%) |
| Breakout Sound Pressure @ 3m | 38.1 dBA @ 100% · 20.2 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) | 758 × 727 × 649 mm (incl. spigots) |
| Weight | 37 kg |
| Duct Connection Diameter | Ø149 mm (four spigots) |
| Casing | Steel sheet, epoxy paint finish, EPS lining, foam construction |
| 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 |
| Sound Testing Standard | BS EN ISO 3743-1:2010 (independently tested) |
- WHHR Maxi/BY — Bypass, universal handing
- WHHR Maxi/BLH — Bypass, left drain, humidistat
- WHHR Maxi/BRH — Bypass, right drain, humidistat
- Maxi BY+LCD — Bypass, universal, integral LCD commissioning unit
- Maxi+LHHLCD — Bypass, left drain, humidistat, integral LCD
- Maxi+RHHLCD — Bypass, right drain, humidistat, integral LCD
