Heat Pump Thoughts

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#1341684 12-Jul-2015 17:20

Add me to the Mitsubishi fan list. Had two Mitsi heap pumps installed just before summer and they have been incredible at both cooling and now heating. I have sensitive hearing and even I'm not phased by them, they are super quiet.

Jase2985

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#1341690 12-Jul-2015 17:22

lissie:
HP create a nasty heats in my view- I don't like having hot air blown at me. We are considering getting rid of ours and either replacing it with an unflued gas heater. When we get bored with chopping wood I've heard good things about pellet burners

thats why you place the heat pump so its not blowing air where you are most of the time, or change the direction of the vanes so its blowing away from you. its no different to sitting infront of a desk fan.

once the room is at temp you would hardly know the thing was on as there is very little air coming out of them.

as per your other thread talking about your heat pump issues, i think you are doing it wrong or there is something wrong with your heat pump. or you are just overly sensitive.

Batman

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#1341693 12-Jul-2015 17:32

lissie:
MikeB4: We are currently looking at heating options, our home is a Lockwood with high chapel ceilings. Our current heating is glued gas radiant and Log burner. The later has become too difficult for me to manage due to disability, also the heat gathers at the apex of the roof pitch and can leave the rooms cool. I have looked at heatpumps and Mitsubishi seems to be a very good option, however we are not sure if they would create enough circulation to effectively heat the rooms.

With a cathedral ceiling you should have a ceiling fan if the heat source doesn't have one e.g. a log burner - fans have a winter setting which is designed to push hot air back down. Even our little desk fan makes a noticeable difference in our lounge with a high ceiling and a log burner.

HP create a nasty heats in my view- I don't like having hot air blown at me. We are considering getting rid of ours and either replacing it with an unflued gas heater. When we get bored with chopping wood I've heard good things about pellet burners

I've heard only bad things about pellet fires.

Stan

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#1341695 12-Jul-2015 17:39

joker97:
lissie:
MikeB4: We are currently looking at heating options, our home is a Lockwood with high chapel ceilings. Our current heating is glued gas radiant and Log burner. The later has become too difficult for me to manage due to disability, also the heat gathers at the apex of the roof pitch and can leave the rooms cool. I have looked at heatpumps and Mitsubishi seems to be a very good option, however we are not sure if they would create enough circulation to effectively heat the rooms.

With a cathedral ceiling you should have a ceiling fan if the heat source doesn't have one e.g. a log burner - fans have a winter setting which is designed to push hot air back down. Even our little desk fan makes a noticeable difference in our lounge with a high ceiling and a log burner.

HP create a nasty heats in my view- I don't like having hot air blown at me. We are considering getting rid of ours and either replacing it with an unflued gas heater. When we get bored with chopping wood I've heard good things about pellet burners

I've heard only bad things about pellet fires.

Old Pellet fires where noisy new ones are much better....

Modern Fujitsu's are more efficient unit overall than Mitsubishi with 1-2db in it in terms of noise output.

The new Dikans US7s are crazy efficient

Batman

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#1341698 12-Jul-2015 17:44

I've had Fujitsu Mitsubishi and Daikins. Yes offer in every room type. In two different houses (we moved house).

Somehow the D and the M give better comfort. I can't explain it. We discussed to the death in another forum some time ago.

If i were to pick, I'd go with Daikin in a really cold place. For NI they will both be the same

lissie

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#1341707 12-Jul-2015 18:01

joker97:

I've heard only bad things about pellet fires.

Friend just bought a house with one installed and was very skeptical - but is enjoying it - quiet apparently

I help authors publish their books - DIYPublishing.co.nz

lissie

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#1341708 12-Jul-2015 18:04

Jase2985:
thats why you place the heat pump so its not blowing air where you are most of the time, or change the direction of the vanes so its blowing away from you. its no different to sitting infront of a desk fan.

once the room is at temp you would hardly know the thing was on as there is very little air coming out of them.

as per your other thread talking about your heat pump issues, i think you are doing it wrong or there is something wrong with your heat pump. or you are just overly sensitive.

Yeah I wasn't the idiot that installed it - if I did buy one I'd only ever consider one installed near to the floor - basic physics - particularly iwth a cathedral ceiling. The room never gets to temperature - the only time it stops blowing - is when its defrosting! To be fair given a few hours it will warm the room unassisted - and to my amazement the power bill was under $300 last month - all of which was cold - so that was an awful lot better than expected.

It has been inspected - there is nothing wrong with it

I help authors publish their books - DIYPublishing.co.nz

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timmmay

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#1341710 12-Jul-2015 18:16

lissie: Yeah I wasn't the idiot that installed it - if I did buy one I'd only ever consider one installed near to the floor - basic physics - particularly iwth a cathedral ceiling. The room never gets to temperature - the only time it stops blowing - is when its defrosting! To be fair given a few hours it will warm the room unassisted - and to my amazement the power bill was under $300 last month - all of which was cold - so that was an awful lot better than expected.

It has been inspected - there is nothing wrong with it

What make and model is it? What's the rated heat output? How large is your room and how well insulated? Really does sound faulty or way underpowered. I have high ish ceilings (not cathedral) and a very old house, but I've insulated well. My 10kw Nocria, while a bit loud, heats it quickly and easily.

Jase2985

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#1341716 12-Jul-2015 18:33

lissie:
Jase2985:
thats why you place the heat pump so its not blowing air where you are most of the time, or change the direction of the vanes so its blowing away from you. its no different to sitting infront of a desk fan.

once the room is at temp you would hardly know the thing was on as there is very little air coming out of them.

as per your other thread talking about your heat pump issues, i think you are doing it wrong or there is something wrong with your heat pump. or you are just overly sensitive.

Yeah I wasn't the idiot that installed it - if I did buy one I'd only ever consider one installed near to the floor - basic physics - particularly iwth a cathedral ceiling. The room never gets to temperature - the only time it stops blowing - is when its defrosting! To be fair given a few hours it will warm the room unassisted - and to my amazement the power bill was under $300 last month - all of which was cold - so that was an awful lot better than expected.

It has been inspected - there is nothing wrong with it

if you have high ceilings do you have a ceiling fan to help mix/bring the hot air back down?

xlinknz

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#1341732 12-Jul-2015 19:19

Stan: The new Dikans US7s are crazy efficient

Hi Stan, yes they are but approx $1700 more than the same rated unit from Daikin ! [6KW]

The EECA web site has an excellent table for comparing Energy Star Heat pumps, Interesting the EECA put the cost to run difference between a 6KW heat pump with a COP of 4.44 and 4.08 over 10 years at $186

Batman

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#1341757 12-Jul-2015 19:50

At 6kw at 4.44 the power consumption is 1.35kW. At 4.08 it's 1.48kW

The rest is maths

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#1341759 12-Jul-2015 19:52

In real life it would be different depending on how efficient they run at the kW needed to heat your room to the temperature you want pumping against a certain Outside temperature for certain amount of time ......

lissie

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#1341818 12-Jul-2015 21:43

timmmay:
lissie: Yeah I wasn't the idiot that installed it - if I did buy one I'd only ever consider one installed near to the floor - basic physics - particularly iwth a cathedral ceiling. The room never gets to temperature - the only time it stops blowing - is when its defrosting! To be fair given a few hours it will warm the room unassisted - and to my amazement the power bill was under $300 last month - all of which was cold - so that was an awful lot better than expected.

It has been inspected - there is nothing wrong with it

What make and model is it? What's the rated heat output? How large is your room and how well insulated? Really does sound faulty or way underpowered. I have high ish ceilings (not cathedral) and a very old house, but I've insulated well. My 10kw Nocria, while a bit loud, heats it quickly and easily.

Carrier 6kw heating - the room isn't huge 5m x 5.3m - open (thru an archway to a dining room about 3.2 x 2m The log burner warms it easily - indeed so does the 2.5 kw fan heater I have! Large windows single glazed, the cathedral ceiling appears to have no insulation - going to fix both of those things before we do anything with heating.

I help authors publish their books - DIYPublishing.co.nz

Stan

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#1341840 12-Jul-2015 22:39

xlinknz:
Stan: The new Dikans US7s are crazy efficient

Hi Stan, yes they are but approx $1700 more than the same rated unit from Daikin ! [6KW]

The EECA web site has an excellent table for comparing Energy Star Heat pumps, Interesting the EECA put the cost to run difference between a 6KW heat pump with a COP of 4.44 and 4.08 over 10 years at $186

Oh yes we sell a Fujitsu nocria 6kw with a cop of 4.44 for $2399 with a back to back install. Dikans are rather expensive but technically excellent.

ben28

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#1341849 12-Jul-2015 23:03

Google Pebble air, I think these wifi control devices work most brands. So they aren't just a Fujitsu product.
We got 3 Fujitsu. The e3 new models. Very happy so far. Quiet. They have a 7 day timer with up to 4 events per day. So that may influence your decision if 7 day timers are important
They also have a human sensor, which drops the temp setting by 4 degrees if no one detected within 7 m for 20 minutes. We don't use that feature but you may.
Wish I'd got heat pumps years ago, even just one back then
I'd strongly recommend getting a specialist company in. The cost of the product and install will be cheaper than buying retail then getting someone else to install. Plus you get their guidance on buying and siting the units.
I chose Fujitsu as better heating efficiency and horizontal direction control on the larger units

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