Rangehood / kitchen extractor recommendation

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yann

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#3388786 1-Jul-2025 20:54

hsvhel:

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

Similar situation for me, in that my rangehood has a peak flow rate of 1600m³/hr I think. Given this and as the house is relatively airtight, when the fireplace is going and even with the rangehood on low, it can compete with the fireplace and pull smoke from it. Given this, I just open a window somewhere in the house and that seems to alleviate things, though does mean pulling some cold air in for a time, which isn't really a bad thing given the fireplace can get going.

I do find this air movement handy in summer, as during crepuscular hours when things have cooled a little outside, I run the rangehood for a period (default timer of 15 mins usually and without the filters on), and it pulls a fair bit of cool air into the house having opened windows around the place.

Yann

BlargHonk

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#3388787 1-Jul-2025 20:55

hsvhel:

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

Hmm our fireplace is in the dining room. Is there a way to stop it pulling smoke back through? Just go for a fan with a lower CFM?

hsvhel

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#3389652 4-Jul-2025 12:39

@BlargHonk

Found if we start the fire and get a draw going it's mostly fine. Only 1/2 days a year when the pressure is a bit high would still cause an issue with the extractor on and the fire past the kindling phase.

Manageable, Found for us, it was better to have Max CFM to remove cooking smells/steam from the house overall

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duckDecoy

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#3447289 26-Dec-2025 16:40

We're looking at replacing our existing rangehood as it doesn't seem to be doing a good job anymore. It was an Applico brand with max 1000m3/hr model, but doesn't seem to be available anymore.

I've seen various suggestions on this thread, including popping an inline remote controlled fan onto the existing ducting and pulling out the existing motor. Plus some brand suggestions if we simply replace it.

Before we start i'd like to know what extraction rate should we set as the minimum we need. Browsing online shows quite a variety of max extraction rates across all the brands, so this might give us a starting point for what to look at.

johno1234

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#3447356 26-Dec-2025 18:32

duckDecoy:

We're looking at replacing our existing rangehood as it doesn't seem to be doing a good job anymore. It was an Applico brand with max 1000m3/hr model, but doesn't seem to be available anymore.

I've seen various suggestions on this thread, including popping an inline remote controlled fan onto the existing ducting and pulling out the existing motor. Plus some brand suggestions if we simply replace it.

Before we start i'd like to know what extraction rate should we set as the minimum we need. Browsing online shows quite a variety of max extraction rates across all the brands, so this might give us a starting point for what to look at.

you sure it’s not got blocked filters or gunked fan blades?

duckDecoy

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#3447416 26-Dec-2025 20:01

johno1234:

duckDecoy:

We're looking at replacing our existing rangehood as it doesn't seem to be doing a good job anymore. It was an Applico brand with max 1000m3/hr model, but doesn't seem to be available anymore.

I've seen various suggestions on this thread, including popping an inline remote controlled fan onto the existing ducting and pulling out the existing motor. Plus some brand suggestions if we simply replace it.

Before we start i'd like to know what extraction rate should we set as the minimum we need. Browsing online shows quite a variety of max extraction rates across all the brands, so this might give us a starting point for what to look at.

you sure it’s not got blocked filters or gunked fan blades?

The filters are getting yellow within a week on the underside but still clean on the inside, so we suspect it isn't really drawing air properly. We clean the filters each week now. And the kitchen often fills with smoke when it didn't used to, so that's another clue it isn't drawing. Plus our heat pump next to the kitchen has been grotty inside each time its serviced over the last couple years so that also indicates something isn't working, the heat pump was always clean before.

The blades might be gunked up, but after taking the filters out and looking up I don't see any brackets or connectors that would let me remove the motor at all to clean them out. There is almost zero space on the sides of the motor to let me see the blades and I definitely couldn't clean them with the space available. I assume the connection for the motor to the housing is above. Perhaps I will take a look at how easy it is to remove the flue cover and see if I can take the motor out.

Would blocked blades make the unit more noisy and "vibrationy"? Because lately it has been making a hell of a racket and makes a loud vibratory noise through the wall it is mounted on.

It was installed in 2006 so we've had nearly 20 years out of it. If it is time to replace it I feel it owes us nothing.

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timmmay

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#3447417 26-Dec-2025 20:11

Ours worked a bit better for a while after we cleaned it, but it's still dripping grease and we don't know where it's coming from. We'll replace it when we get around to it.

If your 1000m3/hr worked ok when it was new I suspect another one similar will probably be ok. I'd replace any ducting and grills as well if you can.

gzt

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#3447420 26-Dec-2025 20:41

Take the cowling off and turn the unit on. See if any air is escaping around the exhaust hose at top and bottom. I had a problem where the hose was not really installed properly and worked it's way off slightly letting exhaust escape.

Also, too much flexible hose was installed which doesn't help. I could shorten it. I intend to replace the flexihose with a straight hose at some point to gain a few cfm.

I have a very cheap f&p unit. It is mostly effective but If doing it again I'd look at a lower noise unit. I'd also look at mounting it higher. Once in a blue moon I whack my forehead on the corner while cooking

gzt

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#3447424 26-Dec-2025 21:10

timmmay: Ours worked a bit better for a while after we cleaned it, but it's still dripping grease and we don't know where it's coming from.

With this problem I'd try replacing the exhaust hose, if you haven't already.

tweake

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#3447510 27-Dec-2025 11:11

the first thing i would do is go outside and check the outlet. check thats not blocked up. if its got flaps, make sure they all open and are not sticky or grimy. the harder they are to open the more restriction they will cause.

Goosey

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#3447553 28-Dec-2025 07:32

tweake:

the first thing i would do is go outside and check the outlet. check thats not blocked up. if its got flaps, make sure they all open and are not sticky or grimy. the harder they are to open the more restriction they will cause.

also, try remove the outside grill or flaps and carefully inspect it to see if it’s blocked…. Vacuuming it gently with the brush attachment….who knows could be a nest of sorts or a tonne of spider webs.

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duckDecoy

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#3462985 19-Feb-2026 10:55

Has anybody had experience with the Sirius rangehood system? We'd be using the SEM 1 option. Im interested in the noise from the unit.

A big factor for us is noise, the kitchen is next to the lounge and we are semi open plan. The rangehood vents directly up through the kitchen ceiling and out the roof (probably 2m in total) and we'd like to keep this arrangement, so the motor would likely need to be attached to the ceiling OR the wall between the lounge and the kitchen.

I was talking to an office mate who recently installed a Sirius extractor, and he said while it is silent in the kitchen it most certainly is not silent in the spare bedroom which is where they mounted the inline unit. That's fine for them because that room is hardly used, but we use the kitchen and lounge all the time.

Anyone else have feedback on the noise levels of the motor when its installed?

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