Heatpumps: Suggestions? Fujitsu? Nocria?

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Batman

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#124626 14-Jul-2013 16:33

Sorry I know this has been done to the death but I've moved house and am looking for a few heatpumps. I have a few issues

1) In my previous house we installed 2 Fujitsu Nocrias and had an existing 10 year old daikin. The daikin air that comes out is HOT. The Nocria air that comes out is lukewarm. Anyone has noticed the nocria air is not hot?

2) How does the nocria compare to other Fujitsu ones namely Hi Wall Compact and Premier Plus?

I think I might go to a dealer and put my hand under their pumps and feel their air temperature. I have been quoted $3900 for Daikin and $2400 for the Fujitsu *sigh

timmmay

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#855361 14-Jul-2013 16:47

I have a 7kw 3 year old Daikin and a 1 year old 10kw Nocria. Both work well, the room gets as warm as I want, quickly. Nocria is louder, and 7 day timer not available afaik. Happy enough with both but slightly prefer the way the daikin remote works. Nocria is very efficient, cheaper to run.

I have an IR thermometer and can measure for you tomorrow maybe, stuck in Auckland airport tonight with Wellington closed. Not sure it's important so long as they heat the room.

billgates

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#855380 14-Jul-2013 17:05

Have 2 Fujitsu Cassette Tray style heat pumps in the house installed just over 3 years ago and they work great. No issues with them. Got a Fujitsu DC Inverterinstalled just this week at one of family businesses. Seems to be working great as well. It was $4400 incl install.

Do whatever you want to do man.

Hammerer

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#855422 14-Jul-2013 18:17

joker97: ...
I think I might go to a dealer and put my hand under their pumps and feel their air temperature. I have been quoted $3900 for Daikin and $2400 for the Fujitsu *sigh

That is not a good way to compare heat pumps. The temperature you feel depends upon several factors: the airflow, the spread of the airflow, and the programmed operation of the unit. Many heat pumps are programmed to work as efficiently as possible which is suits me because that is what I want. The best use inverters which allow variable output.

The Fujitsu Nocrias almost certainly use inverters that allow variable output so the heating is throttled back to improve the coefficient of performance (COP). You should be able to override that program.

Your 10 year old Daikin may not use an inverter. If so it cycles power on and off because it only has two speeds, stopped or flat out. This does not allow for optimising of efficiency because continuous cycling is wasteful. [Edited for clarity]

kiwirock

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#855518 14-Jul-2013 21:39

I'm a Daikin fan, but I love Toshiba's.

I think Tosh did the inverter, and the new refrigerant (forget what it's called, R410 or something) didn't they before everyone else?

I've had Fujitsu older units, the change over valve started giving up only 3-4 years in to it's life so circulated to much refrigerant instead of bringing it inside. Another friends older Fujitsu did the same. Time and new technology though means they are probably okay these days.

But a console 6.3kW I think it is, at a friends blows heat something wicked. It's a Tosh. You can turn the fan down on it and it slows the comrpessor right down so it works good as a forced power savings feature. I think her Tosh has a variable expansion valve as it works really well when it's below degrees outside.

But them Mitsubishi's are pretty good too. The Tosh is the hottest I've personally encountered for it's rating.

Anyway, when I've been up at shipping container broadcast sites I've seen Toshiba's in there that have served a really good life.

Cheers,
Gavin.

edit: A fridgey friend says always oversize a heatpump and for NZ go for one that has a more frequent defrost. He used to install only Daikin's at a business him and his brother have in Aussie.

timmmay

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#856233 16-Jul-2013 08:12

A large heat pump can operate more efficiently - it's working away middle of its range, not working super hard all the time. That's what I was told anyway. Once a room is up to temperature efficiency is better.

Yesterday my Daikin had ice all over it, the Fujitsu had none, but both were still working fine. They both defrost themselves as required.

Batman

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#856278 16-Jul-2013 10:06

Thanks guys