Aluminium window insulation

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Ultimate Geek

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#2930622 16-Jun-2022 21:17

I think it can run separately because it's a daikin heatpump with the lossnay (not 100 sure though).

I think you're right though, heatpump fan should be used as biggger ducting/airflow.
When I done it the other day though, within 5-10 mins is was notably colder, temp dropped. So hope the lossnay does enough

It's kind of hard keep switching between the heating and fan only mode. The app is terrible ( just timer for 1 X on, 1 X off, no scheduling). I've scheduled the wall timer for every night and morning for heat, but would one day like to get something smarter

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timmmay

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#2930640 16-Jun-2022 21:44

Home Assistant can be quite good for automation, but there's a bit of a learning curve.

tweake

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#2930641 16-Jun-2022 21:48

33coupe:

I think it can run separately because it's a daikin heatpump with the lossnay (not 100 sure though).

I think you're right though, heatpump fan should be used as biggger ducting/airflow.
When I done it the other day though, within 5-10 mins is was notably colder, temp dropped. So hope the lossnay does enough

It's kind of hard keep switching between the heating and fan only mode. The app is terrible ( just timer for 1 X on, 1 X off, no scheduling). I've scheduled the wall timer for every night and morning for heat, but would one day like to get something smarter

i thought the whole point with lossnay system was to integrate it with their ducted heat pump and they work together. ie heat pump fan runs on low speed all the time and speeds up when heating and cooling start.

When I done it the other day though, within 5-10 mins is was notably colder, temp dropped. So hope the lossnay does enough

not sure what you mean by that tho.

33coupe

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#2930645 16-Jun-2022 22:01

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Sorry that was a lazy/tired attempt at an explanation.
I ran the ducted on fan mode during the day (at it's warmest) and it made the house colder. I saw the temp drop. It warmed up when I turned fan off but kept lossnay on.
But will change my approach if I'm doing it wrong, not getting benefit of lossnay etc.

So everyone that has a lossnay system will always have the heatpump running 24x7 on fan mode (or heating or cooling)?
If so I hadn't been made aware of that

I did look at home assistant briefly but didn't get very far before getting stuck/confused lol.
Was kind of hoping theres an affordable plug and play type device (cielo looks cool)

tweake

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#2930834 17-Jun-2022 10:19

33coupe:
I ran the ducted on fan mode during the day (at it's warmest) and it made the house colder. I saw the temp drop. It warmed up when I turned fan off but kept lossnay on.
But will change my approach if I'm doing it wrong, not getting benefit of lossnay etc.

So everyone that has a lossnay system will always have the heatpump running 24x7 on fan mode (or heating or cooling)?
If so I hadn't been made aware of that

depending a bit on how much the temp dropped, thats either because the rest of the house was cooler and now you have mixed the air flow around the house, or its the effect of having the ducts and heat pump 'outside' (ie in the ceiling) or there is a gap somewhere allowing cold air to be sucked in. eg poorly fitted return, or bad return setup (no door jumpers) and your pushing air out of the house and sucking more in via the ventilation.

unfortunately i don't know of the details of the whole lossnay system. they advertise it as a balanced ventilation system, but they also advertise it integrated with the ducted heatpump (diagram of it around somewhere). one would assume they did the obvious thing and integrated the controls.

with non-balanced ventilation thats connected through the hvac system they often run it on a timer, so the hvac system runs the hvac fan for a length of time every hour.

tweake

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#2930894 17-Jun-2022 13:11

33coupe:

So everyone that has a lossnay system will always have the heatpump running 24x7 on fan mode (or heating or cooling)?
If so I hadn't been made aware of that

doing a bit of digging over lunch.

from what i have seen so far is mitsi ducted heat pump has a ventilation function in the menus (but it doesn't say what it does). so far i have not seen that shown in the daikin ducted heatpump.

any chance you have a pic of how your system is setup duct wise ?

33coupe

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Ultimate Geek

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#2931762 19-Jun-2022 19:05

Sorry for the delay, I've finally managed to get up there and have a look.

I drew the picture from memory, I think that's how it's setup. Additional pics of ducting. I'm not overly happy with some squashed ducting, would it affect performance?

https://photos.app.goo.gl/xUywrJrM9gqmeF22A

tweake

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#2931792 19-Jun-2022 19:48

33coupe: Sorry for the delay, I've finally managed to get up there and have a look.

I drew the picture from memory, I think that's how it's setup. Additional pics of ducting. I'm not overly happy with some squashed ducting, would it affect performance?

https://photos.app.goo.gl/xUywrJrM9gqmeF22A

thanks for that.

i will try to ask a pro i know, but that may take a little while.

however this is how mitsi show it installed https://www.mitsubishi-electric.co.nz/ventilation/whole-home-heating.aspx which makes sense. going by your diagram they have it in parallel (instead of series) which means the fans will fight with each other. even worse if the heat pump has variable speed fans. balanced ventilation need to be tuned so you have the correct flows in/out so you have the right pressures. having it compete with another fan will screw that up a bit. but i will double check on that.

tweake

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#2931795 19-Jun-2022 20:00

one other thing, do you know what core you have in it? erv or hrv ?

33coupe

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#2931813 19-Jun-2022 20:54

tweake:
33coupe: Sorry for the delay, I've finally managed to get up there and have a look.

I drew the picture from memory, I think that's how it's setup. Additional pics of ducting. I'm not overly happy with some squashed ducting, would it affect performance?

https://photos.app.goo.gl/xUywrJrM9gqmeF22A

thanks for that.

i will try to ask a pro i know, but that may take a little while.

however this is how mitsi show it installed https://www.mitsubishi-electric.co.nz/ventilation/whole-home-heating.aspx which makes sense. going by your diagram they have it in parallel (instead of series) which means the fans will fight with each other. even worse if the heat pump has variable speed fans. balanced ventilation need to be tuned so you have the correct flows in/out so you have the right pressures. having it compete with another fan will screw that up a bit. but i will double check on that.

Thank you. This is the first time I've actually seen it, so am bit surprised it's ducted that way.
The lossnay was fitted slightly after, but guessing that shouldn't be an issue as can change it fairly easily I'm assuming?

I'm not too sure what core it has, couldn't see it on any quotes etc. I can find out if need be.
Thanks

tweake

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#2931841 19-Jun-2022 21:44

33coupe:

Thank you. This is the first time I've actually seen it, so am bit surprised it's ducted that way.
The lossnay was fitted slightly after, but guessing that shouldn't be an issue as can change it fairly easily I'm assuming?

I'm not too sure what core it has, couldn't see it on any quotes etc. I can find out if need be.
Thanks

i don't know how long you have had it but they do have filters in them that need checking and replacing (they are there to protect the core). you also should have a filter on the fresh air inlet and of course the air return filter for the heat pump (which are the two main ones to change).

changing the duct work is fairly straight forward but it will need a return grill put in the ceiling. note the mitsi pic that shows intakes in the ceiling. there is a few fancy things you can do as well but thats another story.

as i don't know the units i'm not sure on their software setup. you should not really have the ability to change ventilation flows on a keypad. they should be set and forget.

very important you know what core it has. there is benefits and risks that you need to know.

33coupe

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#2931848 19-Jun-2022 22:20

Thanks for the info. Installed just over a year, and funnily enough the change filter indicator has just come on.

I forgot to add /mention in my drawing that I have another return on the heatpump, think that goes direct to the heatpump unit.

I'll ask the installer about the core, and also about the ducting layout

tweake

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#2932022 20-Jun-2022 11:06

just thinking about this a bit more, next time your up in the ceiling check if there is a backdraft damper on the heat pump output. they would need one to stop the ventilation air taking the easy path and going back through the heat pump and out the ventilation exhaust.

33coupe

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Ultimate Geek

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#2934622 26-Jun-2022 15:15

Apologies for the delay, I've been unwell with the tummy bug from day care.

I had a quick look, I'm not too sure what a back draft damper looks like sorry but couldn't see anything different to ducting etc.

I've just updated the drawing to show a bit more complete. Hopefully that makes a bit more sense as to how it's setup.

can anyone confirm if this setup is correct?

I haven't checked with installer yet as I wanted to get my facts straight before asking

33coupe

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Ultimate Geek

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#2934624 26-Jun-2022 15:20

https://photos.app.goo.gl/xUywrJrM9gqmeF22A

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