This product has been discontinued. Please contact us for assistance at if needed.
This product was replaced by  FLEX 100H ES HRV
ECOM Symbol ECOM Symbol ECOM Symbol



Item Number: 44001

• Airflow up to 104 cfm @ 0.4" PS serves 1 to 7 bedroom homes
• Top-mounted ports for easier duct connectivity
• Unobstructed front access
• The TurboTouch feature delivers up to 50% more exhaust capacity
• Aluminum core provides superior heat transfer capability
• Integrated airflow measurement system allows for rapid and accurate reading of airflow during installation

As Fantech's masterpiece of versatility, features and efficiency, the Flex® 100H ES is ideal for high-rise apartment applications, condominiums, single and multi family homes. With its compact top port design featuring 5 inch oval collars and the included EZ-MountTM wall bracket, the Flex 100H ES can be installed in spaces as small as 24 inches, such as a closet or maintenance room.

How it works

Unlike traditional HRVs that require excessive power to meet supplemental ventilation needs, the compact, yet powerful Flex 100H ES allows for sizing based entirely on principal ventilation requirements. With its exclusive TurboTouchTM feature, the Flex 100H ES can deliver up to 50% more exhaust capacity to easily meet supplemental ventilation needs whenever additional airflow is required.

Technical parameters

Voltage (nominal) 120 V
Frequency 60 Hz
Phase(s) 1~
Input power 168 W
Input current 1.4 A
Air flow 49 L/s
Static pressure 100 Pa
Exchanger type Heat recovery (aluminium)
Dimensions and weights
Weight 39.2 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)





32 (0)

64 (30)





32 (0)

81 (38)





32 (0)

102 (48)





-13 (-25)

66 (31)





A B C D E F Duct size

21 1/2 (546)

14 1/2 (368)

15 5/8 (397)

17 8/9 (454)

22 1/2 (572)

15 (381)

5 (125) Oval

Dimensional information is in inches (mm)


Two (2) factory-balanced fans with backward curved blades. Motors come with permanently lubricated, sealed ball-bearings to guarantee long life and maintenance-free operation.

Heat Recovery Core

Aluminum heat recovery core covered by a limited lifetime warranty. Core dimensions are 8.5” x 8.5” (216 x 216 mm) with a 12” (305 mm) depth. Our heat exchangers are designed and manufactured to withstand extreme temperature variations.


The unit incorporates a unique and quiet internal recirculation defrost that does not depressurize the home during the defrost cycle. A preset defrost sequence is activated when the outdoor temperature falls below 23° F (-5° C) and automatically adjusts itself based on operating conditions. The fan speed is also adjusted automatically to provide a smooth and quiet transition between Ventilation & Defrost mode.


Core, filters, fans, drain pan and electrical panel can be accessed easily from the access panel. Core conveniently slides out with only 14” (356 mm) clearance.

Duct Connections

5” (125mm) Oval plastic duct connections with integrated balancing damper and airflow measurement ports.


24 gauge galvanized steel. Baked power-coated paint for a superior adhesion and resistance.


Cabinet is fully insulated with 1” (25 mm) high density expanded polystyrene.


Two (2) washable electrostatic panel type air filters 8.5” (216mm) x 12.5” (318 mm) x 0.125” (3mm).


Limited lifetime on aluminum core, 7 year on motors, and 5 year on parts.

Requirements and standards
• Complies with the UL 1812 requirements regulating the construction and installation of Heat Recovery Ventilators
• Complies with the CSA C22.2 no. 113 Standard applicable to ventilators
• Complies with the CSA F326 requirements regulating the installation of Heat Recovery Ventilators
• Technical data was obtained from published results of test relating to CSA C439 Standards
• HVI certified and ENERGY STAR® qualified*

* This product earned the ENERGY STAR® by meeting strict efficiency guidelines set by Natural Resources Canada and the US EPA. It meets ENERGY STAR® requirements only when used in Canada

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