VH 704 Fresh Air Appliance

Top duct conneciton HRV, 57 cfm, w/o control

Item Number: 40358

Airflow up to 56 cfm @ 0.4" PS serves 1 to 2 bedroom homes

Single speed ventilation; no controls needed

Includes easy-mount wall bracket

Application

As Fantech's smallest and most compact top duct connection HRV, the VH 704 unit brings a continuous supply of fresh air into a home while exhausting an equal amount of contaminated air.

How it works

During winter, fresh incoming air is tempered by the heat that is transferred from the outgoing air so you save on energy costs, while during summer, the incoming air is pre-cooled if the house is equipped with an air cooling system. The VH 704 is equipped with automatic defrost mechanisms so you can use your HRV all year long.

Defrost cycle

Unit is designed to operate continuously on a single speed. The automatic defrost cycle consists of a fan shutdown: when the supply air stream temperature goes below 23°F, the supply motor shuts down, while the exhaust motor continues to ventilate. Ambient air is passed through the unit for a period of 3 or 5 minutes. The supply motor will then re-start and run at the preset speed.

Technical parameters

Product
Voltage (nominal) 120 V
Frequency 60 Hz
Phase(s) 1~
Input power 48 W
Input current 0.4 A
Air flow 55 cfm
Static pressure 0.4 in.wg
Certificate CSA, HVI
Exchanger
Exchanger type Heat recovery (aluminium)
Dimensions and weights
Weight 24.3 lb
Used for
Installation placement Vertical
Heating Supply temperature Net airflow Consumed power Sensible recovery efficiency Apparent sensible effectiveness Latent recovery/moisture transfer

°F (°C)

cfm (L/s)

W

%

%

-

32 (0)

55 (26)

36

57

67

-

32 (0)

67 (32)

40

55

64

-

32 (0)

84 (39)

40

54

60

-

-13 (-25)

73 (34)

35

53

66

-

A B C D E Duct Size

22 1/2 (572)

21 1/2 (546)

10 3/16 (259)

17 3/16 (437)

15 2/3 (398)

4 (100)

Dimensional information is in inches (mm)

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