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Frequently Asked Questions: What is included in set with ECMF-R fan? 1.Fan pre-wired with a 6.5ft long cable and grounded 3-prong plug. 2. Wireless Remote Speed Controller. 3.Installation Hardware (Screws and Anchors). How to adjust ECMF-R series fan speed? Each ECMF-R fan is supplied with a remote speed controller. Remote controller works from up to 50 FT range and allows to select 6 speeds from OFF position to MAX SPEED. When using the controller for the first time, it has to paired with the fan by pressing and holding "+" or "-" button for 3 seconds. Fan speed pre-sets available via remote speed control: OFF = 0% Output Level 1 = 10% Output Level 2 = 25% Output Level 3 = 50% Output Level 4 = 65% Output Level 5 = 85% Output Level 6 = 100% Output Will Other Speed Controllers work with ECMF-R fan? No. If you need a replacement of ECMF-R fan speed controllers please contact TerraBloom's customer service. What are the requirements for the fan's operating environment? ECMF-R fan can be operated in the environments with temperatures between 15°F(-10°C) to 140°F (60°C) and humidity levels not exceeding 90%. ECMF-R series fans have IPX4 IP Rating. What type of ball bearing used in ECMF-R series fans? ECMF-R fans are built with heavy-duty dual ball bearings rated for up to 70,000 hours of operation. Can ECMF-R fans be used for boost airflow in heater ducts? ECMF-R can be installed in heating ducts with most modern home furnaces, however, it is important to ensure that the air temperature in the duct is not over 140 °F. Please note, fire places and fire-based heaters supply air at over 140 °F, which will cause ECMF-R fan to trigger overheat safety switch and/or cause deformation of the impeller.