The motor doesn't mount in the range hood, it mounts in the roof space.

lxsw20:

 

The motor doesn't mount in the range hood, it mounts in the roof space.

 

timmmay:

 

@CrazyM sorry I missed your post the first time around. Interesting idea... replacing the motor sounds much less work than having the whole assembly ripped out and replaced.

 

Some questions  🙂

 

 

 

• How difficult was it to get the fan into the ceiling and get it all connected up?
• Once the old motor was out of the rangehood do you just have a dangling pipe inside the rangehood?
• Does that extractor / controller work together out of the box or would something else need to be done to connect them?
• What size did you get an how well does it work?
• Did it cost much other than motor and controller?

I looked at semi rigid ducting and it seems very expensive - $60 per meter and I'd need about 6 - 8 meters so it'd cost more than the rangehood.

 

No worries @Timmmay here are some answers

• Getting the fan into the roofspace was easy. My system exhausts through the roof with 1m of rigid duct, so I just hung the motor off the duct to get the placement right and then mounted a board to my roof trusses to bolt the motor feet onto. Very solid, very secure. The 3 pin plug from the motor I plugged into the existing roofspace powerpoint for the rangehood ( I put a double plug here so I can still use the rangehood light) And then the semirigid duct to connect the motor to the rangehood spigot
• Removing the old motor was easy. Took the wires out all the way into the control panel. No dangling vent pipe, the motor just slotted into a sheet metal spigot which the flexi-duct connects to. See poor image below (the grease stain is from the old motor leaking...)
• Extractor and wireless controller work out of the box. Mingfans set it all up before its sent. I had thoughts about trying to wire the motor up to the existing rangehood controls but I wasn't confident that the existing switches would suit the current of the new motor.
• I have the 150mm TSK150-3 and it works VERY well. 95% of its time it stays on the lowest speed, only ever sees High when I'm really trying to char a steak 😁
• Apart from the motor and controller I bought 3m of semi-rigid ducting. It used to be cheaper but its currently $45 for 3m and I think worth every penny.
  
  https://tradedepot.co.nz/flexible-ducting-pack-semi-rigid-3m-x-150mm/
  
  
  

Awesome, thanks @CrazyM. How much did the remote cost? It's not listed on their website.

I think we'll use standard flexible ducting. We'll use better stuff when we redo the kitchen.

Did you do anything to prevent grease dripping out of the motor in the ceiling space? I'm wondering if we can mount the motor hanging down from a piece of wood, with a tray or something under it.

I asked the place I thought I bought the rangehood if they could get a replacement motor, but nope. About about 5 years old is apparently difficult to source them.

I'm going to do what the appliance store recommended - take the existing motor out, take it apart, and try some degreaser on it. It's more work but lowest impact otherwise. If it can work for another couple of years until we replace the kitchen that'll be fine.

If it fails we'll order the Ming Fans motor and remote - though they haven't replied to my inquiry on their website so I don't even know if they have the remote still.

We managed to clean the existing rangehood. I'll probably create a post about it some point as there's not much information around.

There was quite a bit of grease and such on the fan blades, but the main problem was it collecting in the base of the motor housing and dripping out. I cleaned it out with a narrow paint scraper, cleaned the housing with a few cycles of oven cleaner and hose, the case was good. The motor we cleaned by hand with wet wipes, then with a wet wipe on the end of a tool that's a bit like tweezers. It wasn't particularly heavy to get the motor down, or difficult to get it back up, but I don't even know what brand the extractor is.

The end result is no building work to get the old one out and the new one in, no costs beyond a few supplies, and it took around half a day.

Goosey: Nice.

I reccomend morning fresh ultimate power clean (bbq cleaner) for the mesh.
Water blaster works too… (with decent grease cutting liquid soaked in for a bit).

My wife has a special cleaner for the filters, but thanks for the recommendation.

Also, don't waterblast your washing machine, even if it has a fabric softener build up...

Resurrecting this thread to get feedback on my own Frankenstein kitchen ventilation ideas.

We currently have our oven placed right in front of a window so not really possible to fit a standard rangehood. It currently has a non-working fan in the ceiling that vented directly into the ceiling space. It probably stopped working as it is full of grease. 

What I would like to do is fit a cheapish extraction system that will bring it up to healthy homes standard, while still meeting the aesthetic/usability approval of the other half. Probably do as much as I can myself (except for electrical).

I am currently thinking that I will need some kind of cleanable grease filter before the fan system. Something like the EVOAC Grease Grille or the Eggcrate Grille with grease filter below. 

https://www.thehvacshop.co.nz/products/view/1133

https://shop.evoaq.co.nz/product/evoaq-grease-grille-2/ 

Then using ducting to a 150mm inline fan. Get a sparky to wire in a 3-pin plug in the ceiling space. Get it controlled by changing one of the power outlets near the kitchen to one with an extra switch to turn it on. 

Then use a backflow preventer and ducting out the soffit. 

Questions:

 

1. What kind of fan would be best to use? Axial? Mixed Flow? Are there any extra requirements for kitchen extraction compared to bathroom fans? There seems to be a massive range of fans available from like $150 - $600+
2. Best method to mount the outlet grille to the most likely white asbestos soffit? Replace whole soffit sheet? 150mm holesaw, shaving cream and dust masks? Or is it better to vent out the corrugated iron roof? 
3. Will this meet the healthy home requirements? It seems to in terms of airflow, but I am not sure if there is a requirement for distance away from cooking surface?
4. Are there any grease filters that would work better than the ones above?
5. Anything else I should be aware of?

Anyone tried tricleanium to clean the filters? I see it's now available in nz..

Also have the same issue with grrat dripping from the fan enclosure with no obvious methid to clean or drain the extractor fan.. such a design flaw.

Even after we took the whole thing apart to clean it's still oily and dripping occasionally. We'll buy a new one when we get around to it.

We purchased one of these for our new build: https://www.fisherpaykel.com/nz/rangehoods/integrated-rangehoods/90cm-series-7-integrated-insert-wall-rangehood-external-motor-hp90idchex4-50192.html

The motor itself sits outside of the roof so is fairly silent in operation. It was quite a bit more expensive than a standard extractor, but with open plan living/kitchen it certainly made sense to pay the extra. 

Disclaimer, have not fully read the last 3 pages....

When we reno'd in 2019, i went overkill on the CFM for the kitchen, as a result, if the extractor is operating, even low,  the fireplace can flow chimney exhaust into the house via the firebox normal intake.

slight overlook on our part