can I run two 20w extractor fans off of this smart Fused spur?

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21 Sep 2024
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Country
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I'm going to put two 20w extractor fans into a dry attic space to ventilate it as it gets very hot in summer due to all of the insulation that the government forced us to install for the winter.

I'm planning to connect them to a smart Fused spur so that I can turn it on and off remotely via home assistant and a wireless temperature sensor.

can I run them both off of a single spur, or do need two. the math says that the base load is well within the limits, but us there some other reason I'd need to seperate them.

The spur is


the extractor fans are

Specification
Brand
Manrose
Building Regulations
Will comply with Building Regulation Part F if installed in accordance with the manufacturer's instructions and by a competent person.
Construction Material (Heating)
ABS Plastic
Domestic/Commercial Use
Suitable for Domestic & Commercial Use
Ducting Diameter
100 mm
Ducting Included
Ducting Not Included
Extraction Band
201-300 m³/hr
Extraction Rate
245 m³/hr
Extractor Fan Control Type
Standard
Fan Diameter
100 mm
Fan Operation Type
Mains Wired
Fan Speed Settings
2-Speed
Fitting Installation
Mount in Loft or Ceiling Void
Fixings Supplied
Fixings Supplied
IP Rating
IPX4
Manufacturer Guarantee
3 Year Manufacturer's Guarantee (T&Cs Apply)
Model Name/No
MF100
Noise Level at 3m
24 dBA
Overload Protection
Overload Protection
Pack Size
1
Pieces in Pack/Case
1
Power Consumption
20 W
Power Voltage Supply
240 V
Product Depth
298 mm
Product Height
230 mm
Product Type
Mixed Flow Fan
Product Width
175 mm
 
I'm planning to connect them to a smart Fused spur so that I can turn it on and off remotely via home assistant and a wireless temperature sensor.
Oh, please tell me more, getting a wireless temperature sensor to turn a zigbee switch on and off seems good, but 13 amp is around 3000 watts so it could control a 100 fans.

Looking at my own loft, not sure if too hot for a smart switch, but it should be OK.

Zigbee uses a hub, and I am unsure how hubs vary. My old hub now wants my email address, and what I pay and get for electric import and export. As to what it does with it?
 
My thoughts would be that if you are sucking hot air in, which is what would happen when you sucked air out with the fans, unless you could place a vent up into the loft from your coolest bedroom, then you would not have much of a cooling effect. Perhaps you would be better with a small AC unit which everyone seems to be buying lately. Controlled remotely as you are going to do with the fans.
 

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