Heat Pumps separate prices

Forums › Home Workshop DIY › Heat Pumps separate prices

rodloc

55 posts

Master Geek

#215467 28-Jun-2017 20:40

Hi,

I am wondering if anyone knows anywhere in NZ that sells the indoor unit and a multisplit outdoor unit separately. I am wanting to get a multisplit system installed in my house but most of the heatpump installers I believe over charge for the installation of a multisplit system.

Thanks,

1 | 2

20574 posts

Uber Geek

Trusted

Lifetime subscriber

#1808507 28-Jun-2017 21:07

Most sell it, but most say it's not worth doing. I don't know if it's the install cost or the part cost. Single units are high volume, ducted units probably moderate to low volume, multi units probably very low volume.

You could consider individual units or a ducted unit if you can't find what you want.

rodloc

55 posts

Master Geek

#1808522 28-Jun-2017 21:41

Cannot fit a ducted unit supposedly in our roof space. But I think I might have to have a multiple split units as it will possibly be cheaper.

Batman

Mad Scientist
29760 posts

Uber Geek

Trusted

Lifetime subscriber

#1808524 28-Jun-2017 21:45

Split units are a handicap in most models. The maximum output per indoor unit is reduced by a factor of the number of units.

So if you have a 10kW outdoor unit, and 4 indoor, each can only output 2.5kW if Daikin. Apparently that's how it works.

larknz

1688 posts

Uber Geek

ID Verified

Lifetime subscriber

#1808527 28-Jun-2017 21:53

You can have different sized indoor units, they don't all have to be the same rating. But the total rating of the indoor units can't be greater than the outdoor unit. This is my understanding when we got a system with three indoor units.

Batman

Mad Scientist
29760 posts

Uber Geek

Trusted

Lifetime subscriber

#1808567 29-Jun-2017 06:38

larknz: You can have different sized indoor units, they don't all have to be the same rating. But the total rating of the indoor units can't be greater than the outdoor unit. This is my understanding when we got a system with three indoor units.

Ah that makes more sense than what I was told in layperson explanation by the Daikin quoter!

The issue was when I checked out the price of the inverter unit, when it needed to be something like 10kW +, the price was about the same as getting 3 smaller inverters, so I saw no advantage. I wasn't concerned about how many ugly things were out the side path however.

larknz

1688 posts

Uber Geek

ID Verified

Lifetime subscriber

#1808572 29-Jun-2017 07:11

Another potential problem is that all indoor units have to operate in the same mode. You can't have one heating and the other cooling, although generally that shouldn't be a problem.

rodloc

55 posts

Master Geek

#1809202 29-Jun-2017 20:50

Thanks for info. So you would all recommend getting separate units rather than get multisplit units.

I am more leaning towards getting Panasonic but is there any others that you would suggest.

The bedrooms are not super big and have been 2.5 cooling to 3.2 heating.

The largest bedroom is 10m2. Smallest is 7m2. Do you think these are the right size. It is a townhouse so each room only has 1 wall facing outside.

Equinox IT

Cloud spending continues to surge globally, but most organisations haven’t made the changes necessary to maximise the value and cost-efficiency benefits of their cloud investments. Download the whitepaper From Overspend to Advantage now.

mattwnz

20141 posts

Uber Geek

#1809205 29-Jun-2017 20:56

I think it comes down to cost, and also if you want all the exterior units in one place, so you don't have to see the ugly boxes. Also maybe the runs, as you can only have a certain separation between the interior and exterior units. My installer recommended mistubishi, which also does the designer boxes.

timmmay

20574 posts

Uber Geek

Trusted

Lifetime subscriber

#1809206 29-Jun-2017 20:58

Is there any way one larger heat pump could reach all your bedrooms? We have two heat pumps for the house, they heat all the bedrooms up ok if the doors are open. At night when doors are often closed we use oil heaters.

I don't think I'd want a heat pump in a bedroom, they're somewhat loud and blowy. My wife is from the UK and is used to radiators, she hates the heat pump breeze. If I built a new house I'd have under floor heating or radiators.

larknz

1688 posts

Uber Geek

ID Verified

Lifetime subscriber

#1809209 29-Jun-2017 20:59

We have a Daiken system which we are happy with. It's good only having a single outdoor unit.

mattwnz

20141 posts

Uber Geek

#1809211 29-Jun-2017 21:06

timmmay:

Is there any way one larger heat pump could reach all your bedrooms? We have two heat pumps for the house, they heat all the bedrooms up ok if the doors are open. At night when doors are often closed we use oil heaters.

I don't think I'd want a heat pump in a bedroom, they're somewhat loud and blowy. My wife is from the UK and is used to radiators, she hates the heat pump breeze. If I built a new house I'd have under floor heating or radiators.

The problem with radiators, apart from them not cooling, is that they use a lot of wall space and are pricey. Not sure how long they last for either before they need replacing. At least the ones that use water heating. Slab is okay, but very slow response time, and also doesn't cool. You can potentially lose a lot of heat out the edge of the slab if the insulation isn't done properly, and also quite expensive to run. As the response lag is so high, they don't really suit the NZ climate where during the day it can be quite warm, but the night the temp drops a lot. I have spent a lot of time analyzing the various pros and cons with most heating systems.

mattwnz

20141 posts

Uber Geek

#1809214 29-Jun-2017 21:07

larknz: Another potential problem is that all indoor units have to operate in the same mode. You can't have one heating and the other cooling, although generally that shouldn't be a problem.

That should never be a problem. Otherwise you would just open a window to cool.

rodloc

55 posts

Master Geek

#1809215 29-Jun-2017 21:12

The reason I am looking at heat pumps is mainly for cooling during the summer months. Rooms can get up to 30degrees. Though it also has the advantage of heating rather than oil heaters that do not regulate heat very well. And the fans that we currently use do not do good enough job.

Also getting a heatpump into the hall way would be hard plus it does not have good location on the wall or ground to place it.

blakamin

4431 posts

Uber Geek
Inactive user

#1809227 29-Jun-2017 21:27

How big is your house?

Ours is mostly open plan 130m2 ish with the split at one end of the house.

We have the biggest Panasonic single split you can buy domestically (in fact the outdoor unit is the same as the neighbours ducted Panasonic system).

It heats great in winter, and since 45c isn't uncommon here in summer, it cools like a dream. 30 degrees not even a temp we turn the AC on, unless it's bed time :D

http://www.panasonic.com/au/support/product-archives/air-conditioning-ventilation/econavi-reverse-cycle-inverter/cs-cu-e28pkr.html

rodloc

55 posts

Master Geek

#1809238 29-Jun-2017 21:40

2 stories with approximately 50 m2 each. We currently have a Panasonic that has been in the house since we arrived down stairs that does a good job. Though during summer it does not cool upstairs when ac is on. Especially in my youngest child's room which is close to 30 degrees most days between December and March.
Opening windows upstairs does not work. Also heating wise it does not cover upstairs as we still need to have an oil heat we running.

The position of the hallway does not allow a heatpump to be placed in it to cover all rooms at once.

1 | 2