Heat Recovery Ventilation (HRV)


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Description ERV is a system which provides controlled ventilation. This system is combined with a heat exchanger for reclaiming energy from exhaust airflows. By using the heated fresh air, less fuel is consumed in the boiler to achieve or maintain the desired operating temperature.

These systems are closely related to the Heat Recovery Systems. However ERVs are not dehumidifier; they also transfer latent heat of the exhaust air. ERVs are also common in colder regions and for very tight houses with less than 0.5 air change per hour to provide adequate ventilation with already heated fresh air.

Advantages

The cost is up to $2,000 for these units, but the costs of running the ventilation can be offset by savings on heating and cooling in areas where ventilation is needed. Closely related are Heat Recovery Ventilators (HRVs) that, in addition, transfer also humidity between inbound and outbound stream.

Disadvantages
  • Very few suppliers are aware of this type of equipment.
Characteristic features

ERVs and HRVs can be stand-alone devices, or they can be added to existing HVAC systems

Application barriers
Information sources http://www.enob.info/de/neue-technologien/projekt/details/feuchte-rueckgewinnung-mit-membrantechnik-fuer-die-wohnraumlueftung/
http://energyrecoveryvent.sustainablesources.com/
http://www.mitsubishielectric.ca/en/hvac/erv/how_it_works.html
Image
Trade: Building services
Parameter Minimal Value Maximal Value Unit
Voltage

115/60

575/60

V/Hz

Power Consumption

200

7500

W

Heat Recovery Rate

50

90

%

Maximum Heat Recovery Rate

%

Sound Power Level

34

58

dBA

Volume Flow

250

30000

m3/h

Minimum Wall Thickness

-

-

mm

Dimensions

700/700/300

2000/3000/6000

mm

Investment Cost

600

25000

Operational Cost

100

1000

€/year

Replacement Cost

20

400

€/year

Life Expectancy

7

15

years

Deterioration Description
Causes
Parameter
Degradation Rate
Measurement


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