What is Mechanical Ventilation with Heat Recovery (MVHR) and how does it benefit schools?

Mechanical Ventilation with Heat Recovery (MVHR) is a system that transforms school ventilation into an effective energy strategy. It works by recovering over 80% of the heat from outgoing air whilst maintaining fresh, comfortable indoor air throughout classrooms, offices and shared spaces. This technology significantly reduces the size of heat pump plant required, lowers running costs, and minimises heat replacement expenses. By integrating MVHR into your school's infrastructure, you create a more energy-efficient environment that benefits both operational budgets and occupant comfort.

Which Airmaster model should we choose for our school, and what are the capacity differences?

The choice of Airmaster model depends on your school's ventilation requirements. The range includes seven models with varying capacities: the AM150 offers 41 l/s (147 m³/h), whilst the larger AM1200 provides 294–363 l/s (1060–1310 m³/h). Smaller facilities like individual classrooms might use the AM150 or AM300, whilst larger schools or multiple building complexes would benefit from the AM500, AM800, AM1000, AM900, or AM1200. Each model is designed to efficiently serve different building sizes, so consulting with an Airmaster expert will help determine the optimal solution for your specific school's needs.

How efficient is the heat recovery in Airmaster systems?

Airmaster systems demonstrate exceptional heat recovery efficiency across their product range. The efficiency varies slightly by model, with most units recovering between 86% and 90% of outgoing heat. The premium models—the AM900 and AM1200—achieve even higher efficiency ratings of 96% and 97% respectively. This high level of heat recovery means that schools can significantly reduce their energy demand whilst maintaining optimal indoor air quality and comfort. The superior efficiency directly translates to lower operating costs and reduced environmental impact over time.

What does "Direct MVHR" mean, and what are its advantages?

Direct MVHR refers to Airmaster's approach of delivering ventilated air with heat recovery directly into rooms without requiring extensive ductwork systems. This direct delivery method offers several practical advantages: it reduces installation complexity, lowers electrical consumption since less energy is needed to distribute air through pipes, and simplifies maintenance procedures. By eliminating complicated ductwork infrastructure, schools can achieve faster installation times, lower capital expenditure, and easier access for future servicing and repairs.

How does Airmaster's Active Performance Monitoring help schools maintain their ventilation systems?

Airmaster's Active Performance Monitoring provides real-time performance data that continuously tracks how your ventilation system is operating. This proactive monitoring capability helps identify potential issues early before they become serious problems, allowing schools to address maintenance needs promptly. The system optimises operation based on live performance metrics, ensuring that ventilation functions exactly as intended. By catching problems early and maintaining optimal performance, schools can avoid costly downtime, extend equipment lifespan, and ensure that classrooms maintain consistent air quality and comfort levels throughout the academic year.

Airmaster

AMX 4

Supply air filter

ePM10 50%, ePM1 55% or ePM1 80%

Extract air filter

ePM10 50%

Operating range (max. capacity), outside temperature

-15 °C to 40 °C

Dimensions (WxHxD)

2055 x 358 x 1100 mm

Weight: standard air handling unit, complete

235 kg

Weight: casing

175 kg

Weight: service cover

55 kg

Color: casing / panels and service cover

RAL 9005 (Jet Black) / RAL 9010 (Pure white)

Counterflow heat exchanger

Aluminium

Energy class, cf. EU regulation no. 1254/2014

SEC class A

Air leakage classification cf. EN 1886 / EN 13141-7

Class L2 / A1

Air leakage classification, main damper, cf. EN 1751

Class 3

IP code

Duct connection

Ø200 mm

Condensate pumps: capacity / lifting height (at 5 l/h)

10 l/h / 6 m

Condensate drain hose: internal diameter / external diameter

Ø6 mm / Ø9 mm

Supply voltage

220-240V/50Hz, ~1N+PE

Power factor (including heat pump)

0.92

Maximum power; nominal power consumption at 30 dB(A) / 35 dB(A) / Boost (including heat pump)

2560 W; 406 / 570 / 802 W

Maximum current; nominal current at 30 dB(A) / 35 dB(A) / Boost (including heat pump)

11.2 A; 1.79 / 2.51 / 3.53 A

Maximum fuse

16 A, 1 phase, type C

Leakage current AC / DC

6 mA / 0.04 mA

Recommended residual current circuit breaker (RCCB)

Type B

Electrical heating surfaces - Heat output (Surface 1 / 2)

1150 W / 1150 W

Electrical heating surfaces - Nominal current (Surface 1 / 2)

5 A / 5 A

Electrical heating surfaces - Thermal circuit breaker, manual reset

100°C

Heat pump - Nominal cooling output

2000 W

Heat pump - Nominal heat output

2300 W

Heat pump - Materials: pipes / fins

Copper / Aluminium

Heat pump - COP (heating) ventilation

5.7 – 7.4

Heat pump - COP (heating) recirculation

3.6

Heat pump - EER (cooling) ventilation

2.3 – 3.8

Heat pump - Refrigerant / GWP

R290 / 0.02

Heat pump - Filling

330 g

Filter class	30 dB(A)	35 dB(A)	Boost
ePM1 50%	222 m³/h	288 m³/h	315 m³/h
ePM10 55%	220 m³/h	284 m³/h	310 m³/h

Downloads

Technical Guide Datasheets

AM 50

Supply air filter

ISO ePM10 50%

Extract air filter

ISO ePM10 50%

Dimensions; indoor / in wall / outdoor / length

Ø316 mm / Ø255 mm / Ø300 mm / 250-520 mm

Wall thickness

250-520 mm

Weight

9.1 kg

Colour, internal lid

RAL 9016 (white)

Colour, outside hood

RAL 7001 (grey)

Energy class, cf. EU regulation no. 1254

SEC class B

IP code; indoor / outdoor

30/34

Temperature efficiency at step 1 / 2 / 3 / 4 / 5 / 6 acc. to EN 13141-8

96% / 92% / 88% / 85% / 81% / 78%

SFP value (J/m3) at step 1 / 2 / 3 / 4 / 5 / 6

1218 / 1079 / 797 / 654 / 850 / 1769

Supply voltage

220-240V/50Hz, ~1N+PE

Nominal power consumption at step 1 / 2 / 3 / 4 / 5 / 6

10 W / 11 W / 11 W / 12 W / 16 W / 34 W

Nominal current at step 1 / 2 / 3 / 4 / 5 / 6

0,05 A / 0,06 A / 0,08 A / 0,10 A / 0,13 A / 0,19 A

Power factor

0,55

Maximum fuse

13 A (1 phase, type B)

Leakage current AC / DC

≤ 1,20 mA / ≤ 0,000 mA

Recommended residual current circuit breaker (RCCB)

Type B

Step	Capacity [m³/h]	Sound pressure [dB(A)]
1	15	25
2	21	30
3	28	35
4	37	40
5	46	45
6	59	50

Downloads

Technical Guide Datasheets

AM 150

Supply air filter

ePM10 50%, ePM1 55% or ePM1 80%

Extract air filter

ePM10 50%

Dimensions (WxHxD)

1170 x 261 x 572 mm

Weight, standard air handling unit, complete

53 kg

Weight, casing

40 kg

Weight, service cover

13 kg

Colour, casing

RAL 9010 (white)

Counterflow heat exchanger

PET (Polyethylene terephthalate)

Energy class, cf. EU regulation no. 1254

SEC class A

Air leakage classification cf. EN1886/EN13141-7

Class L1 / Class A1

Air leakage classification, main damper, cf. EN1751

Class 3

IP code

Duct connection

Ø160 mm

Condensate pump (capacity/lifting height at 5 l/h)

10 l/h / 6 m

Condensate drain hose int./ext. diameter: AM 150 ; CC 150

Ø4 mm / Ø6 mm ; Ø6 mm / Ø9 mm

Supply voltage

220-240V/50Hz, ~1N+PE

Maximum power consumption

204 W

Maximum current

1,87 A

Recommended fuse

0,48

Maximum fuse

13 A, 1 phase, type B. CC module: Type C is required.

Leakage current AC / DC

≤ 0,52 mA / ≤ 0,0007 mA

Recommended residual current circuit breaker (RCCB)

Type F / Type B CC module: Type B is required.

Filter class	30 dB(A)	35 dB(A)	Boost
ePM10 50%	106 m³/h	146 m³/h	225 m³/h
ePM1 55%	84 m³/h	117 m³/h	206 m³/h
ePM1 80%	80 m³/h	108 m³/h	190 m³/h

Downloads

Technical Guide Datasheets

AM 300

Supply air filter

ePM10 50%, ePM1 55% or ePM1 80%

Extract air filter

ePM10 50%

Dimensions (WxHxD)

1180 x 344 x 705 mm

Weight, standard air handling unit, complete

85 kg

Weight, casing

70 kg

Weight, service cover

15 kg

Colour, casing

RAL 9010 (white)

Counterflow heat exchanger

Aluminium

Air leakage classification cf. EN1886/EN13141-7

Class L2 / A1

Air leakage classification, main damper, cf. EN1751

Class 3

IP code

Duct connection

Ø160 mm

Condensate pump (capacity/lifting height at 5 l/h)

10 l/h / 6 m

Condensate drain hose int./ext. diameter

Ø4 mm / Ø6 mm

Supply voltage

220-240V/50Hz, ~1N+PE

Maximum ; nominal power consumption at 30 dB(A) / 35 dB(A) / Boost

175 W ; 55 W/ 102 W / 123 W

Maximum ; nominal current at 30 dB(A) / 35 dB(A) / Boost

1,45 A ; 0,45 A / 0,84 A / 1,01 A

Power factor

0,53

Maximum fuse

13 A (1 phase, type B)

Leakage current AC / DC

≤ 0,7 mA / ≤ 0,005 mA

Recommended residual current circuit breaker (RCCB)

Type B

Electrical heating surfaces - Heat output (Preheating / Comfort)

1000 W / 500 W

Electrical heating surfaces - Nominal current (Preheating / Comfort)

4,35 A / 2,17 A

Electrical heating surfaces - Thermal circuit breaker, manual reset

100 °C / 100 °C

Water heating surface - Nominal heat output

1593 W

Water heating surface - Connection dimension / Materials pipes/fins

1/2" (DN 15) / copper/aluminium

Water heating surface - Opening/closing time, motor valve / Max temp / Max pressure

60 s / 90 °C / 5 bar

Filter class	30 dB(A)	35 dB(A)	Boost
ePM10 50%	210 m³/h	275 m³/h	315 m³/h
ePM1 55%	205 m³/h	270 m³/h	315 m³/h
ePM1 80%	180 m³/h	240 m³/h	305 m³/h

Downloads

Technical Guide Datasheets

AM 500

Supply air filter

ePM10 50%, ePM1 55% or ePM1 80%

Extract air filter

ePM10 50%

Dimensions (BxHxD)

1600 x 439 x 779 mm

Weight, standard air handling unit, complete

108 kg

Color, Panel / Color, Case

RAL 9010 (white) / RAL 7024 (grey)

Counterflow heat exchanger

Aluminum

Air leakage classification cf. EN1886/EN13141-7

Class L2 / A2

Air leakage classification main damper, cf. EN1751

Class 3

IP code

Duct connection

Ø250 mm

Condensate pump (Capacity ; Lifting height at 5 l/h)

10 l/h ; 6 m

Condensate drain hose int./ext. diameter

Ø6 mm / Ø09 mm

Supply voltage

220-240V/50Hz, ~1N+PE

Nominal power consumption

132 W

Nominal current

1.1 A

Power factor

0.58

Maximum fuse

13 A (1 phase, type B). When using the cc module, it is type C

Leakage current AC / DC

≤ 6mA

Recommended residual burrent bicuit breaker (RCCB)

Type B

Electrical heating surfaces - Heat output (Preheating / Comfort)

1000 W / 630 W

Electrical heating surfaces - Nominal current (Preheating / Comfort)

4.4 A / 2.6 A

Electrical heating surfaces - Thermal circuit breaker, manual reset

100 °C / 100 °C

Water heating surface - Nominal heat output

858 W

Water heating surface - Connection dimension / Materials pipes/fins

3/8" (DN 10) / Copper/aluminum

Water heating surface - Opening/closing time motor valve / Max temp

60 s / 90 °C

Water heating surface - Maximum operating pressure

5 bar

Filter class	30 dB(A)	33 dB(A)	35 dB(A)
ePM10 50%	430 m³/h	490 m³/h	550 m³/h
ePM1 55%	387 m³/h	441 m³/h	495 m³/h
ePM1 80%	344 m³/h	392 m³/h	440 m³/h

Downloads

Technical Guide Datasheets

AM 800

Supply air filter

ePM10 50%, ePM1 55% eller ePM1 80%

Extract air filter

ePM10 50%

Dimensions (BxHxD)

1910 x 474 x 916 mm

Weight, standard air handling unit, complete

157 kg

Color, Panel / Color, Case

RAL 9010 (white) / RAL 7024 (grey)

Counterflow heat exchanger

2 x Aluminum

Air leakage classification cf. EN1886/EN13141-7

Class L2 / A1

Air leakage classification main damper, cf. EN1751

Class 3

IP-code

Duct connection

Ø315 mm

Condensate pump (Capacity ; Lifting height at 5 l/h)

10 l/h ; 6 m

Condensate drain hose int./ext. diameter

Ø6 mm / Ø09 mm

Supply voltage

220-240V/50Hz, ~1N+PE

Nominal power consumption

156 W

Nominal current

1.1 A

Power factor

0.56

Maximum fuse

16 A (1 phase, type B). When using the cc module, it is type C

Leakage current AC / DC

≤ 6mA

Recommended residual burrent bicuit breaker (RCCB)

Type B

Electrical heating surfaces - Heat output (Preheating / Comfort)

1500 W / 1000 W

Electrical heating surfaces - Nominal current (Preheating / Comfort)

6,5 A / 4,4 A

Electrical heating surfaces - Thermal circuit breaker, manual reset

100 °C / 100 °C

Water heating surface - Nominal heat output

1379 W

Water heating surface - Connection dimension / Materials pipes/fins

1/2" (DN 15) / Copper/aluminum

Water heating surface - Opening/closing time motor valve / Max temp

60 s / 90 °C

Water heating surface - Maximum operating pressure

5 bar

Filter class	30 dB(A)	33 dB(A)	35 dB(A)
ePM10 50%	650 m³/h	688 m³/h	725 m³/h
ePM1 55%	585 m³/h	619 m³/h	653 m³/h
ePM1 80%	520 m³/h	550 m³/h	580 m³/h

Downloads

Technical Guide Datasheets

AM 950 C

Operating range (max. capacity), outside temperature

-20 °C – +40 °C

Intake filter

ePM10 50%, ePM1 55%, ePM1 80%

Extract filter

ePM10 50%

Dimensions (DxWxH)

1613 x 2167 x 505 mm

Weight: standard air handling unit, complete

340 kg

Color: casing

RAL 9010

Counterflow heat exchanger

Aluminium

Air leakage classification cf. EN 1886 (external leakage)

Class L2

Air leakage classification cf. EN 13141-7, EN 13141-8 (external leakage)

Class A1

Air leakage classification cf. EN 308 (internal leakage)

Max. 0.5%

Air leakage classification, main damper, cf. EN 1751

Class 3

IP code

Duct connection

Ø315 mm

Free area, inlet opening, inner / outer

0.0956 m² / 0.157 m²

Free area, extract opening

0.088 m²

Condensate pump: capacity / lifting head at 5 l/h

10 l/h / 6 m

Condensate drain hose: internal diameter / external diameter

Ø6 mm / Ø9 mm

Supply voltage

220-240V/50Hz, ~1N+PE or 220-240V/50Hz, ~3N+PE

Maximum power

354 W

Maximum current

2.76 A

Power factor

0.56

Leakage current AC / DC

≤ 6mA

Maximum fuse

16 A, 1 phase, type B or 16 A, 3 phase, type B

Recommended residual current circuit breaker (RCCB)

Type B

Filter class	30 dB(A)	35 dB(A)	Boost
ePM10 50%	745 m³/h	950 m³/h	980 m³/h
ePM1 55%	740 m³/h	940 m³/h	965 m³/h
ePM1 80%	720 m³/h	930 m³/h	960 m³/h

Downloads

Technical Guide Datasheets

AM 1000

Supply air filter

ePM10 50%, ePM1 55% or ePM1 80%

Extract air filter

ePM10 50%

Dimensions (WxHxD)

2325 x 561 x 1283 mm

Weight: Standard unit complete; centre -, left -, right -, front module; service covers

301,5 kg; 131 kg; 61 kg; 36 kg; 19 kg; 35 kg

Color, Panel / Color, Case

RAL 9010 (white) / RAL 7024 (grey)

Counterflow heat exchanger

Aluminium

Air leakage classification cf. EN1886/EN13141-7

Class L2 / A1

Air leakage classification, main damper, cf. EN1751

Class 3

IP code

Duct connection

Ø315 mm

Condensate pump (capacity/lifting height at 5 l/h)

10 l/h / 6 m

Condensate drain hose internal/external diameter

Ø6 mm / Ø09 mm

Supply voltage: single-phase ; three-phase

220-240V/50Hz, ~1N+PE; 220-240V/50Hz, ~3N+PE

Nominal power consumption at 30 dB(A) / 35 dB(A)

280 W / 305 W

Nominal current at 30 dB(A) / 35 dB(A)

2,0 A / 2,2 A

Power factor

0,6

Maximum fuse

16 A (1 phase, type B) / 3 x 16 A (3 phases, type B)

Leakage current

≤ 4 mA

Recommended residual current circuit breaker (RCCB)

Type B

Electrical heating surfaces - Heat output (Preheating / Comfort)

2300 W / 1500 W

Electrical heating surfaces - Nominal current (Preheating / Comfort)

10 A / 6,5 A

Electrical heating surfaces - Thermal cutout, automatic reset

50 °C / 50 °C

Electrical heating surfaces - Thermal cutout, manual reset

100 °C / 100 °C

Water heating surface - Nominel heat output

2540 W

Water heating surface - Connection dimension

1/2" (DN 15)

Water heating surface - Materials pipes/fins

Copper/aluminum

Water heating surface - Opening/closing time, motor valve / Max temp

60 s / 90 °C

Water heating surface - Maximum operating pressure

5 bar

Filter class	30 dB(A)	35 dB(A)
ePM10 50%	950 m³/h	1050 m³/h
ePM1 55%	926 m³/h	1024 m³/h
ePM1 80%	903 m³/h	998 m³/h

Downloads

Technical Guide Datasheets

AM 900

Supply air filter

ePM10 50%, ePM1 55%, or ePM1 80%

Extract air filter

ePM10 50%

Dimensions (BxHxD)

800 x 2323 x 602 mm

Recommended minimum ceiling height / minimum ceiling height

2490 mm / 2400 mm

Weight, standard air handling unit, complete

180 kg

Color casing

RAL 9010

Counterflow heat exchanger

3 x PET (Polyetylentereftalat)

Air leakage classification cf. EN1886/EN13141-7

Class L2 / A1

Air leakage classification main damper, cf. EN1751

Class 3

IP code

Duct connection

Ø315 mm

Condensate pump (Capacity ; Lifting height at 5 l/h)

10 l/h ; 6 m

Condensate drain hose int./ext. diameter

Ø4 mm / Ø6 mm

Supply voltage

220-240V/50Hz, ~1N+PE

Nominal power consumption

240 W

Nominal current

1,8 A

Power factor

0,6

Maximum fuse

16 A (1 phase, type B)

Leakage current AC / DC

≤ 6mA

Recommended residual burrent bicuit breaker (RCCB)

Type B

Electrical heating surfaces - Heat output (Preheating / Comfort)

1500 W / 1050 W

Electrical heating surfaces - Nominal current (Preheating / Comfort)

6.5 A / 4.4 A

Electrical heating surfaces - Thermal circuit breaker, manual reset

100 °C / 100 °C

Water heating surface - Nominal heat output

2345 W

Water heating surface - Connection dimension / Materials pipes/fins

1/2" (DN 15) / Copper/aluminum

Water heating surface - Opening/closing time motor valve / Max temp

60 s / 90 °C

Water heating surface - Maximum operating pressure

5 bar

Filter class	30 dB(A)	33 dB(A)	35 dB(A)
ePM10 50%	690 m³/h	760 m³/h	830 m³/h
ePM1 55%	669 m³/h	737 m³/h	805 m³/h
ePM1 80%	649 m³/h	714 m³/h	780 m³/h

Downloads

Technical Guide Datasheets

AM 950 F

Operating range (max. capacity), outside temperature

-20 °C – +40 °C

Intake filter

ePM10 50%, ePM1 55%

Extract filter

ePM10 50%

Dimensions (Width x Depth x Height)

1150 x 661 x 2260 mm

Minimum ceiling height

2300 mm

Weight: standard air handling unit, complete

297 kg

Color: casing

RAL 9010

Counterflow heat exchanger

Aluminium

Air leakage classification cf. EN 1886 (external leakage)

Class L2

Air leakage classification cf. EN 13141-7, EN 13141-8 (external leakage)

Class A1

Air leakage classification cf. EN 308 (internal leakage)

Max. 0.5%

Air leakage classification, main damper, cf. EN 1751

Class 3

IP code

Duct connection

Ø315 mm

Free area, inlet opening / free area, extract opening

0.07 m² / 0.143 m²

Condensate pump: capacity / head at 5 l/h

10 l/h / 6 m

Condensate drain hose: internal diameter / external diameter

Ø6 mm / Ø9 mm

Supply voltage

220-240V/50Hz, ~1N+PE or 220-240V/50Hz, ~3N+PE

Maximum power

354 W

Maximum current

2.76 A

Power factor

0.56

Leakage current AC / DC

≤ 6mA

Maximum fuse

16 A, 1 phase, type B or 16 A, 3 phase, type B

Recommended residual current circuit breaker (RCCB)

Type B

Filter class	30 dB(A)	35 dB(A)	Boost
ePM10 50%	755 m³/h	915 m³/h	960 m³/h
ePM1 55%	735 m³/h	908 m³/h	960 m³/h

Downloads

Technical Guide Datasheets

AM 950+ F

Operating range (max. capacity), outside temperature

-20 °C – +40 °C

Intake filter

ePM10 50%, ePM1 55%

Extract filter

ePM10 50%

Dimensions (Width x Depth x Height)

1150 x 661 x 2260 mm

Minimum ceiling height

2300 mm

Weight: standard air handling unit, complete

297 kg

Color: casing

RAL 9010

Counterflow heat exchanger

Aluminium

Air leakage classification cf. EN 1886 (external leakage)

Class L2

Air leakage classification cf. EN 13141-7, EN 13141-8 (external leakage)

Class A1

Air leakage classification cf. EN 308 (internal leakage)

Max. 0.5%

Air leakage classification, main damper, cf. EN 1751

Class 3

IP code

Duct connection

Ø315 mm

Free area, inlet opening / free area, extract opening

0.07 m² / 0.143 m²

Condensate pump: capacity / head at 5 l/h

10 l/h / 6 m

Condensate drain hose: internal diameter / external diameter

Ø6 mm / Ø9 mm

Supply voltage

220-240V/50Hz, ~1N+PE or 220-240V/50Hz, ~3N+PE

Maximum power

784 W

Maximum current

3.51 A

Power factor

0.972

Leakage current AC / DC

≤6mA

Maximum fuse

16 A, 1 phase, type B or 16 A, 3 phase, type B

Recommended residual current circuit breaker (RCCB)

Type B

Filter class	30 dB(A) (Footnote E / Footnote F)	35 dB(A) (Footnote E / Footnote F)	Boost
ePM10 50%	755 / 805 m³/h	915 / 1020 m³/h	1285 m³/h
ePM1 55%	735 / 775 m³/h	908 / 1010 m³/h	1285 m³/h

Downloads

Technical Guide Datasheets

AM 1200

Supply air filter

ePM10 50%, ePM1 55%, or ePM1 80%

Extract air filter

ePM10 50%

Dimensions (BxHxD)

496 x 2098 x 2427 mm

Weight, standard air handling unit, complete

545-630 kg

Color casing

RAL 7024

Counterflow heat exchanger

4 x Aluminium

Air leakage classification cf. EN1886/EN13141-7

Class L2 / A2

Air leakage classification main damper, cf. EN1751

Class 3

IP code

Duct connection

Ø400 mm

Condensate pump (Capacity ; Lifting height at 5 l/h)

10 l/h ; 6 m

Condensate drain hose int./ext. diameter

Ø4 mm / Ø6 mm

Supply voltage

220-240V/50Hz, ~1N+PE - ~3N+PE

Nominal power consumption

254 W

Nominal current

1.4 A

Power factor

0.6

Maximum fuse

16 A (1 phase, type B)

Leakage current AC / DC

≤ 9mA

Recommended residual current circuit breaker (RCCB)

1 phase, type B

Electrical heating surfaces - Heat output (Preheating / Comfort)

2500 W / 1670 W

Electrical heating surfaces - Nominal current (Preheating / Comfort)

10.9 A / 7.3 A

Electrical heating surfaces - Thermal circuit breaker, manual reset

100 °C / 100 °C

Water heating surface - Nominal heat output

2454 W

Water heating surface - Connection dimension / Materials pipes/fins

1/2" (DN 15) / Copper/aluminum

Water heating surface - Opening/closing time motor valve / Max temp

60 s / 90 °C

Water heating surface - Maximum operating pressure

5 bar

Filter class	30 dB(A)	33 dB(A)	35 dB(A)
ePM10 50%	820-930 m³/h	940-1000 m³/h	1060-1130 m³/h
ePM1 55%	738-783 m³/h	846-900 m³/h	954-1017 m³/h
ePM1 80%	656-696 m³/h	752-800 m³/h	936-1008 m³/h

Downloads

Technical Guide Datasheets

Our Approach

Get In Touch

DELTA Energy Centres

Heat Interface Units

Space Heating

Energy Metering and Billing

Heat Recovery Ventilation

Fan Coil and Chilled Beams

System Design

On Site, Support on Demand

MVHR Matters

Airmaster

Why MVHR Matters in School

Direct Mechanical Ventilation with Heat Recovery turns school ventilation into an energy strategy, decreasing heat pump plant size and running costs by reducing waste heat.

Why choose Airmaster

Key features and benefits

Optimum Heat Recovery Efficiency

Recovers over 80% of outgoing heat, reducing energy demand while maintaining fresh, comfortable air throughout classrooms, offices and shared spaces.

Direct MVHR

Delivers air with heat recovery directly into rooms, without ductwork, reducing installation complexity, electrical consumption and maintainability.

Continuous Active Performance Monitoring

Active monitoring provides real-time performance data, helping identify issues early, optimise opteration, and ensure ventilation performs as intended.

Airmaster

AMX 4

Downloads

AM 50

Downloads

AM 150

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AM 300

Downloads

AM 500

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AM 800

Downloads

AM 950 C

Downloads

AM 1000

Downloads

AM 900

Downloads

AM 950 F

Downloads

AM 950+ F

Downloads

AM 1200

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Airmaster

Remain in Kontrol of your MVHR with RavenAirlinq

RavenAirlinq brings all of your Direct MVHR units together on one online portal. Monitor performance, set schedules and adjust controls remotely, from a single classroom to multiple sites. And with increased visibility, our team will be ready to help without the need for a site visit.

A partner through the full project lifecycle

Our approach is built around practical and technical support, clear advice and long-term partnership, not just about supplying products.

Direct MVHR key energy strategy in modern school design

As heat recovery increases, peak heating demand falls, allowing smaller heat pump plant, less distribution infrastructure and reduced capital cost. By recovering more energy at room level, schools can cut CAPEX, simplify design and deliver efficient, comfortable learning environments.

Information about our product

Frequently asked questions

Heat and Power documents

Relevant links and downloads

Datasheets

Access product datasheets with key technical information, performance data and requirements for our heating and ventilation solutions.

Specifications

Browse detailed product specifications to support system design, project planning and technical compliance across a range of applications.

Design Guides

Explore practical design guidance, best practices and expert advice to deliver efficient and effective heat and ventilation systems.

Technical Guides

In-depth technical resources covering commissioning, operation and maintenance to support every stage of your project.

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