AC or DC Fans? AC stands for Alternating Current, whilst a DC fan has a transformer to manage the electrical flow to convert the AC into DC (Direct Current) to power the motor. AC fans are commonly used when consistent and even airflow is required over a long period of time. DC fans may be preferable if the fan is required in a small room or environment when noise level is critical, but possibly not something most people would notice going about their normal daily routine. The good news is both are extremely energy efficient.Although the DC fans draw less power, the difference over a year of average use is just a few dollars. The market today predominantly uses AC fans so there are more models to choose from and possibly more flexibility with features. AC Ceiling Fan Advantages: • Can be used with a standard 3 speed wall control (hard- wired) or a remote control. DC fans are generally operated with a remote control only • Larger range of designs to choose from • Normally a more affordable option than a DC fan • Able to wire multiple ceiling fans to one 3 speed wall controller (ideal for resorts and large areas) DC Ceiling Fan Advantages: • May be more energy efficient than an AC ceiling fan – check the specifications! • Quieter running than some AC fans • In most cases have 6 speeds in both summer and winter directions (normally anti-clockwise in Summer and clockwise in Winter) • Forward / Reverse direction can be changed via the remote control handpiece (AC ceiling fans generally have a manual switch located on the fan) • DC motors weigh less than conventional fan motors, resulting in a lighter product that is easier to install Ducted or Non-ducted Exhaust Fans With changes in regulations and airflow dynamics of the modern home, it’s important to select the correct exhaust fan that not only complies, but also does the job to your customer’s satisfaction. T he National Construction Code (NCC) in relation to ventilation in simple terms covers 2 areas. Firstly, to create adequate airflow from within a specified room (bathroom) and secondly, to have adequate ventilation of the roof space. F or many years the Axial exhaust fan (non-ducted) without draft stopper has been an effective and economical fan for steam and odour removal (diagram 1). Their downfall is that they can contribute to energy loss in the home and do not automatically comply with new home roof ventilation regulations. In our opinion, the side ducted exhaust fans that extract to atmosphere through ductwork and external grille is the best way to ensure compliance and maintain energy standards. This also bypasses the need to consider ventilation of the roof space. Colder climates, air-tight homes, open shower bathrooms, floor to ceiling tiles and long duct runs all contribute to making air extraction more difficult. The optimal ducting length is within 6 metres from the exhaust fan and outlet grille (diagram 2). Anything longer than 6 metres of ducting will require an additional in-line fan to increase the effectiveness of the extraction (diagram 3). Please do not hesitate to seek advice within our branch network on which exhaust fan is the right one for your installation. In consultation with our valued brands, the team at Rexel are here to help you. No Backdraft Stopper NON-DUCTED Ceiling Exhaust Fan Backdraft stopper 6M Max DUCTED Ceiling Exhaust Fan Outlet Grille DUCTED + INLINE FAN Backdraft stopper Inline fan Ceiling Exhaust Fan Outlet Grille FAN CATALOGUE 2021-2022 I Service and Brands you can Trust 3
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