Hi everyone, I need help deciding to buy regular-sized or baby-sized fan for this room. The green circles are where I plan to put downlight (6"). I don't want to get disco effect when I put the ceiling fan in the middle. Please advise.

Use this

Trigo Calculator

Key in this

Angle B = Downlight beam angle divide by 2 (if beam angle 110, then put 55)
Side a = Fan height from ceiling

You will get "Side b" which is the minimum gap from tip of the blade to the centre of the downlight.

Then you can size your fan.

Probably better to give extra 2-3" gap for "safety".

Downlight beam angle also can affect the tendency of disco effect.

https://www.downlightsdirect.co.uk/advice/d...ngle-to-choose/

You can put regular 56in fan but choose downlight with narrower beam angle.. some of the value/cheaper ones are 110 deg wide beam

This might give you a better idea of what LED downlights are available with narrower beam angle:
https://docs.rs-online.com/5a29/0900766b816ee2dd.pdf

May need to look for swiveling spot light /adjustable downlight to point the beam away from the fan blade.
Alternatively pendant/wall lights will eliminate this disco effect.

Hi, thank you for your very scientific reply. May I ask, the side a, fan height. Is this height in feet? I tried plugging in feet, and I got this as side b: 11.9175359259421 . Again, I don't know how to read this. Is this measurement in feet or inch?

Use this

Trigo Calculator

Key in this

Angle B = Downlight beam angle divide by 2 (if beam angle 110, then put 55)
Side a = Fan height from ceiling

You will get "Side b" which is the minimum gap from tip of the blade to the centre of the downlight.

Then you can size your fan.

Probably better to give extra 2-3" gap for "safety".

Paiseh if ask noob question. If I have downlight like this. How do I know the angle? Have to self measure?

Thank you for your reply, I'm considering wall lights too. This might be out of topic, but do you have a recommendation of wall lights that are not too 'fancy', but at the same time not too plain (e.g tube lighting)?

Considering Alpha AX70 for both my bedrooms and loft area. Does anyone have any experience with them?

tube lighting meaning the flourescent/LED tube? https://www.lazada.com.my/products/philips-...2584400925.html
nowadays the trend is to use something like these:
https://www.lazada.com.my/products/ck-light...vSv905&search=1

https://www.lazada.com.my/products/led-wall...6999502057.html?

https://www.lazada.com.my/products/new-nord...5116992455.html?

or droplights if wanna mount on ceiling:
https://www.lazada.com.my/products/single-r...5387976742.html?

ceo684, I’m back again.

My house is quite small and I’m thinking to go for Elmark 52” instead of Alpha Cosa 54”. Two inches for fans makes any big difference?

I’m attracted to KL101’s minimalist design and also the smallest room will be using Elmark Atom 42”. (I managed to plan for lighting so won’t be getting LED fan )

How are they compared to Alpha? Quality?

By the way, is there any 50” remote control fan?

If anybody has comment, also feel free to chip in your thoughts and suggestions.

Wire kipas putus...😞

hi fruitie

Should not be a significant difference between 52 and 54.
However for this particular model Spitfire 246 aka KL101 there are a few things to note:
1. It is exceptionally heavy at 13.4kg (typical fans ard 7-8kg).
2. No spec sheet or mention about KL101/KL / Spitfire 246 on the FB.
3. Reviews -ve

https://shopee.com.my/ELMARK-KL101-SPITFIRE...8211.6416470520
4. In the past there were 17 models recalled in SG https://www.straitstimes.com/singapore/17-e...-problems-found so now you will see a SG model list and a Malaysian model list in the website. They list a lot of other model but their site seems to "forgot" about this model?
5. No spec w.r.t airflow/air delivery (cfm) 

Alpha Cosa 54” 80W motor 8500cfm
Elmark KL101 68W motor N/A cfm

Hence IMO Alpha better (hardly see any recall or -ve).

As for 50in - there is such thing @ NSB Aeratron 3   

sounds troublesome to get ceiling fan. Can it be replaced with air cooler or tower fan?

No noticeable difference. Its pretty windy already even at 1-2 setting
Theoretically this and current Sensa 4, and Vtouch Jr all capable to produce same cfm.

K14Z9
RPM : Low 92 High 215
Capacity (CFM) : 7946
Motor W : Low 18.0 – 22.0 High 70.0 – 82.0
Motor HP : 0.11
Motor Type : AC Motor
Noise Level (dB) : 51.3
Net Weight (kg) : 6.40

K14ZW
RPM Low 81 High 239
Capacity (CFM) 7946
Motor W Low 2.5 High 41.0
Motor HP 0.055
Motor Type DC
Noise Level (dB) 51
Net Weight (kg) 4.9

K14Y2 Vtouch Jr
RPM Low 102 High 215
Capacity (CFM) 7946
Motor W Low 19.5 High 85
Motor HP 0.13
Motor Type 14 Pole Condenser
Noise Level (dB) 52
Net Weight (kg) 6.2

ceo684, this is to inform you I have bought four units of Alpha Cosa 54" and one Alpha Cosa 40". Hope all goes well. Also thanks to others for all your suggestions, especially to blanket84 for suggesting Alpha.

What is the energy rating for those fan? Like you, I'm also searching for fan for my first house.

Quite afraid to get the fan with remote type. Afraid if it is not last longer compared to regulator type.

ceo684, this is to inform you I have bought four units of Alpha Cosa 54" and one Alpha Cosa 40". Hope all goes well. Also thanks to others for all your suggestions, especially to blanket84 for suggesting Alpha.

5 stars energy rating.

I think it is pretty durable these days, almost everyone that I know uses remote type. Regulator type is too troublesome.  Moreover, it doesn't match my house theme.