Recommendations for Air Conditioning expert in Auck ?

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#3155469 3-Nov-2023 15:01

TeaLeaf:

tweake:

it looks to be an ionizer filter. downside to ionizers is they produce ozone. not something you want breathing and also it reacts with other chems in the home to make other bad chems.

a fan with a hepa filter works just as well with no downsides or bad chemistry.

Thanks Tweake. What kind of fan takes a HEPa filter? Do you mean to catch allergants already in the home?

Dakin make these, if they cheap enough I could just go with any air con brand and add couple of these in the house... Air Purifiers - New Range – Daikin NZ

Im curious about my HRV, are these things worth running? Seems they just control moisture, but it uses the hot or cool air from inside the roof, where dust and dust mites live. I really am not knowledgeable on them. Been thinking about servicing the filter in it.....

The main reason I want air con with filters is the Mrs reacts heavily to most allergants. all air cons appear to have basic filters, the kind you can just clean yourself, but they very limited.

What about the Daikin US7 models?

I like that you can keep some humidity as its not healthy to have zero humidity, for the lungs and the skin. I just cant seem to find someone around albany area that sells them.

Allergy-Friendly Options for Your Cooling This Summer | The Heat Pump People

Split System Features to Make Life Better – Daikin NZ

there is air purifiers that do not have UV or ionizers or other gadgets for idiots, but watch the cost of replacement filters. there is a simple way to make one using a cheap box fan and 4 filters. tho those size filters may be hard to get here. the heatpumps that claim they have hepa filters etc typically have some tiny tiny filter which does nothing. one of mine came with one, its a joke. a decent filter for that sort of airflow would be bigger than the heat pump head.

you won't need humidification, i don't think anywhere in nz gets to dry. you will never ever get to dry in albany, quite the opposite. biggest problem is to much humidity. you want a good dehumidifier.

ventilation systems are good. best thing you can do is to not bring crap into the home to start with, plus the ventilation can help blow the crap outside as well. fit a good sized hepa filter to that. the problem with a lot of systems is they only use ceiling air and when it gets hot they turn off. you really need an outdoor air inlet. even better add a Y damper and a thermostat, and it will automatically change over when ceiling gets to hot.

also have some gauges so you see what the issues are and if your fixes actually work.

timmmay

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#3155475 3-Nov-2023 15:18

I have Daikin with an Airtouch 4. My ventilation system is somewhat custom now, but it's pretty much just a motor pulling air from outside through the eaves (I extended it from taking dirty ceiling air myself), through a HEPA / Charcoal filter, pushed into two rooms, with a smart plug so I can schedule when it runs. Filter Specialists takes a regular SmartVent filter and puts a layer of carbon filter onto it for me to reduce smoke smells coming in, it costs costs about $120 and lasts 12 - 18 months. Overall it works well, probably better than trying to filter air after it's been bought into the house. We only run the filter / ventilation system 2 hours a day winter and 4-5 in summer.

Handle9

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#3155505 3-Nov-2023 16:15

timmmay:

I already have HEPA and charcoal filter on the ventilation system. I thought it might be useful to do like they do in the USA ducted systems, they tend to have good filters and sometimes UV filters inline to stop it spreading dust, kill bacteria and viruses. But it's not common in NZ therefore somewhere between impossible and incredibly expensive.

I tried to get a better filter system for my ventilation system, a filter box that takes both HEPA and charcoal / carbon filters. I looked a lot online, called a few vendors, and they can make something custom but there doesn't seem to be a standard. Having a standard box / filter size sounds like a really basic thing that should've been done years ago... probably was but I couldn't find it.

The dust shield in the return vent is better than nothing.

Ventilation systems have a HEPA filter as they take air from the roof cavity.

The dust is already in your house and every time you open a door or a window you introduce more. It means a HEPA filter is a waste of time compared to a standard filter.

There are standard sizes for filters, just as there are standard sizes for ducting. Generally filters are attached the the AHU or FCU, an inline filter is pretty unusual.

timmmay

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#3155517 3-Nov-2023 16:44

Handle9:

Ventilation systems have a HEPA filter as they take air from the roof cavity.

The dust is already in your house and every time you open a door or a window you introduce more. It means a HEPA filter is a waste of time compared to a standard filter.

There are standard sizes for filters, just as there are standard sizes for ducting. Generally filters are attached the the AHU or FCU, an inline filter is pretty unusual.

Ventilation systems take air from wherever you have them set up. My first one took air from the ceiling space through a sock filter, the sock turned from white to gray very quickly and it pulled the odd smell from the ceiling into the house. Once I moved the intake from the ceiling space to outside, through the filters, the house smelled a lot better. Solar gain from the roof isn't that useful in winter, and in summer you don't want it at all.

We live near a motorway and there's a lot of trees around, so hepa plus carbon aims to reduce pollen and any petrol fumes, plus smoke. Costs the same as a regular filter more or less.

What are AHU and FCU? The inline filter I talk about is just a standard filter like this kind of thing. If I could find a filter box that took two filters and standard hepa / carbon filters I'd use those, probably simpler to change out.

TeaLeaf

6325 posts

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#3155518 3-Nov-2023 16:45

Handle9:

There are standard sizes for filters, just as there are standard sizes for ducting. Generally filters are attached the the AHU or FCU, an inline filter is pretty unusual.

Now I understand, it came with the house and all I know is its been keeping things dry. How hard is the filter change, is it something only an HRV tech should do?

I do like the Daikin control of pollen and virus/Bacteria etc. They seem to offer more than just cooling the air like the Fujitsu.

These guys seem super cheap, but they not in NoCowboys and I cant find much info about them. any opinions? FUJITSU, MITSUBISHI, DAIKIN Heat Pumps Auckland (heatpumpdiscounters.co.nz)

TeaLeaf

6325 posts

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#3155519 3-Nov-2023 16:49

timmmay:

We live near a motorway and there's a lot of trees around, so hepa plus carbon aims to reduce pollen and any petrol fumes, plus smoke. Costs the same as a regular filter more or less.

hmm, I live facing the ocean, with some many storms front on Easterly, it loves to eat stuff up. Not sure if I could put the HRV out the roof? What brand is yours?

I need to learn more about servicing it.

tweake

2391 posts

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#3155520 3-Nov-2023 16:50

Handle9:

timmmay:

I already have HEPA and charcoal filter on the ventilation system. I thought it might be useful to do like they do in the USA ducted systems, they tend to have good filters and sometimes UV filters inline to stop it spreading dust, kill bacteria and viruses. But it's not common in NZ therefore somewhere between impossible and incredibly expensive.

I tried to get a better filter system for my ventilation system, a filter box that takes both HEPA and charcoal / carbon filters. I looked a lot online, called a few vendors, and they can make something custom but there doesn't seem to be a standard. Having a standard box / filter size sounds like a really basic thing that should've been done years ago... probably was but I couldn't find it.

The dust shield in the return vent is better than nothing.

Ventilation systems have a HEPA filter as they take air from the roof cavity.

The dust is already in your house and every time you open a door or a window you introduce more. It means a HEPA filter is a waste of time compared to a standard filter.

There are standard sizes for filters, just as there are standard sizes for ducting. Generally filters are attached the the AHU or FCU, an inline filter is pretty unusual.

a lot, dare i say most, do not have hepa filters. a lot just g filters, or at best f8's yes opening a door will ad some extra dust, but your also removing some of that by blow it out and replacing it with dust free air. by no mean is it a waste of time.

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TeaLeaf

6325 posts

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#3155524 3-Nov-2023 16:58

tweake:

a lot, dare i say most, do not have hepa filters. a lot just g filters, or at best f8's yes opening a door will ad some extra dust, but your also removing some of that by blow it out and replacing it with dust free air. by no mean is it a waste of time.

Yes, fresh air is very different to conditioned air. If its going to get filtered anyway, a bit of door opening surely cant hurt.

Daikin seems to be very good at filtering. The fujitsu tech told me to forget them as it will just rust in our conditions. But I think that was somwhat sales talk.

I tink getting a quote from a Daikin installer cant hurt, likewise getting a real Mitsubishi tech to check the original problem, my Mitzy that is not turning over. But they harder to find.

Handle9

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#3155525 3-Nov-2023 16:59

timmmay:
Handle9:

Ventilation systems have a HEPA filter as they take air from the roof cavity.

The dust is already in your house and every time you open a door or a window you introduce more. It means a HEPA filter is a waste of time compared to a standard filter.

There are standard sizes for filters, just as there are standard sizes for ducting. Generally filters are attached the the AHU or FCU, an inline filter is pretty unusual.

Ventilation systems take air from wherever you have them set up. My first one took air from the ceiling space through a sock filter, the sock turned from white to gray very quickly and it pulled the odd smell from the ceiling into the house. Once I moved the intake from the ceiling space to outside, through the filters, the house smelled a lot better. Solar gain from the roof isn't that useful in winter, and in summer you don't want it at all.

We live near a motorway and there's a lot of trees around, so hepa plus carbon aims to reduce pollen and any petrol fumes, plus smoke. Costs the same as a regular filter more or less.

What are AHU and FCU? The inline filter I talk about is just a standard filter like this kind of thing. If I could find a filter box that took two filters and standard hepa / carbon filters I'd use those, probably simpler to change out.

I’ve explained why hepa filters don’t get used on recirculating applications. If you want to do so you do you but that’s why it’ll be expensive and/or difficult as it’s non standard application.

AHU - air handling unit. Used for primary plant and lives in a plant room.
FCU - fan coil unit. Generally used for terminal units. In a commercial application these can be fed by an outdoor air fan, an air handler or be fully recirculating. Domestic ducted units are fully recirculating direct expansion fan coil units.

TeaLeaf

6325 posts

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#3155529 3-Nov-2023 17:13

Handle9: Domestic ducted units are fully recirculating direct expansion fan coil units.

So handle, that would be my HRV?

How often should I replace this filter?

Is difficult, only a tech would know how?

How do you know so much about them? hehe

TeaLeaf

6325 posts

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#3155533 3-Nov-2023 17:24

This is what thess guys want me to do before calling them out. Heat Pump Repairs in Auckland | Heat Pump Guy

Cripes the call out fee alone almost makes me ponder whether or not just to get a new pump.

5) Check there are no tripping circuit breakers or burnt-out fuses on your electrical distribution board (switchboard). This is particularly important if the heat pump displays no function at all, including no response from a remote control command, no movement on the vanes and no lights blinking on the indoor unit.

Do they mean the house switchboard? I dont have circuits, just switches, none are tripped. Or do they mean something inside the heat pump like its computer panel? are there any switches inside the unit I should check or am I wasting my time?

Handle9

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#3155539 3-Nov-2023 17:51

TeaLeaf:
Handle9: Domestic ducted units are fully recirculating direct expansion fan coil units.

So handle, that would be my HRV?

How often should I replace this filter?

Is difficult, only a tech would know how?

How do you know so much about them? hehe

Nah you have a fan and a filter with a controller and maybe a couple of sensors.

The filter will be easily changed, you just need a replacement filter and maybe some duct tape. HRV service guys aren’t exactly top draw HVAC engineers.

I have no idea how often the filter should be changed but I’d just follow HRVs recommendation unless the airflow becomes notably impaired.

I’ve worked in the building technology space for most of my working life. I spent a fair chunk of it in project management and service management.

tweake

2391 posts

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#3155542 3-Nov-2023 17:59

TeaLeaf:

tweake:

a lot, dare i say most, do not have hepa filters. a lot just g filters, or at best f8's yes opening a door will ad some extra dust, but your also removing some of that by blow it out and replacing it with dust free air. by no mean is it a waste of time.

Yes, fresh air is very different to conditioned air. If its going to get filtered anyway, a bit of door opening surely cant hurt.

Daikin seems to be very good at filtering. The fujitsu tech told me to forget them as it will just rust in our conditions. But I think that was somwhat sales talk.

I tink getting a quote from a Daikin installer cant hurt, likewise getting a real Mitsubishi tech to check the original problem, my Mitzy that is not turning over. But they harder to find.

don't forget the hvac won't be running all the time, well at least with most kiwis. ventilation you want it to be running all the time. you can't rely on the hvac for filtering.

these days more and more people are making wising up to the fact we spend a lot of time indoors at home and the pollution levels inside our homes. it was only a few years back they did the first study into the chemistry inside of homes. (homechem is you want to look it up). so things like hepa filters in homes is becoming far more popular.

timmmay

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#3155546 3-Nov-2023 18:08

Handle9:

I’ve explained why hepa filters don’t get used on recirculating applications. If you want to do so you do you but that’s why it’ll be expensive and/or difficult as it’s non standard application.

AHU - air handling unit. Used for primary plant and lives in a plant room.
FCU - fan coil unit. Generally used for terminal units. In a commercial application these can be fed by an outdoor air fan, an air handler or be fully recirculating. Domestic ducted units are fully recirculating direct expansion fan coil units.

Nah I'm not going to do anything with the ducted system, HEPA is on the ventilation system. Works great.

TeaLeaf

6325 posts

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#3155548 3-Nov-2023 18:11

Handle9:
I’ve worked in the building technology space for most of my working life. I spent a fair chunk of it in project management and service management.

Geeze I wish I had that with my PM career, how did you get into that? Do you work with a lot of smart gadgets? Do you put in a lot of communication wiring ie Lan ports throughout the house. We have connections in places of the house Id never consider but its good to have a Lan from the fibre.

What are the main thingss you need to install?

I will google how to change HRV filter once I find the product number haha. Duct tape ;-p

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