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  1. #1
    Join Date
    Aug 2006
    Location
    Hamilton
    Posts
    24

    Default In Slab heating?

    Anyone installed or has comments on In Slab Heating?

    We are building a new home and are having the living/dining/family/ensuite with ground/polished concrete, hence the need for slab heating.

    So far have found out;
    1/Electricity seems cheaper to install but expensive to run.
    2/Gas boiler more expensive to set up bit cheaper to run (but we're not on gas line so bottles will be expensive)
    3/Heatpump (to heat water in pipes in slab) very expensive to set but very cheap to run.
    4/Our builder has diesel boiler but didn't recommend it

    Any comments would be appreciated

  2. #2
    Join Date
    Apr 2006
    Posts
    4,018

    Default

    What are the respective set-up and running costs for each?

    How much heat will each option provide?

    Also, can the electric option be run on ripple control? (11c/kW vs 19c/kW for anytime power).

    Paul.

  3. #3
    Join Date
    Aug 2006
    Location
    Hamilton
    Posts
    24

    Default

    electric can be on off peak supply.
    set up costs so far around 6-8k for electric ($300-$400/ month run cost, and someone said $700/month) 15-17k heat pump ($100-150/month run cost), gas somewhere in between (& $200-300/month and someone said could be up to 600 plus on bottles), I have just got verbals and we now have foundation plan to give out for quotes.
    and of course each one we phone has there own biased opinien on which is best.
    contacted 'consumer' and they have done tests on heat pumps e.t.c. but haven't done on inslab heating.
    can't seem to get an unbiased point of view, hence thought would try here to see if anyone has had any experiences perhaps with different systems

  4. #4
    Join Date
    Jul 2005
    Location
    Brisbane
    Posts
    1,309

    Default

    We have electric under tile heating in our bathroom and it sucks. It takes the chill off the floor but it never really gets that warm. We're Poms, so are used to gas central heating (radiators) which are lovely and toasty. Gas would be my pick simply because of the cost of elex.
    Jo Birch
    Looking for someone to manage your next project or event? Then call now!
    +61 450 148 678

  5. #5
    Join Date
    Mar 2007
    Location
    floating
    Posts
    69

    Default .....go solar

    .....have friends who put in a solar panel on the roof to heat their slab, and another for their hot water and a third to keep their pool warm. maybe better in the north but sunlight is my favourite price - free.....

  6. #6
    Join Date
    Jul 2006
    Location
    NZ, for now
    Posts
    572

    Default

    Check out http://www.floorstore.org/ as an option, I haven't personally used it yet, but its been recommended to me several times elsewhere.
    S.

  7. #7
    Join Date
    Dec 2004
    Location
    Auckland, by default....
    Posts
    95

    Default Another option....

    Came across this the other day at the AK Trade Bldg Show - I am after the same thing [polished slab] on my next house - build the slab on cupolex domes [www.cupolex.co.nz] & in the airspace under the domes have hot air blown/drawn into it {not sure if they have info up yet but worth enquiring]. I have undertile heating currently but wouldn't want this over a whole house - gotta be a better way & I have heard the waterpipes are expensive, but this hot air way has some merits...
    Last edited by dksnz; 28-06-2007 at 03:11 PM. Reason: correct word order

  8. #8
    Join Date
    Apr 2006
    Posts
    4,018

    Default

    My wife and I put tiles throughout the living and wet areas of our first home. We didn't have undertile heating.

    I found that if one kept the air temperature warm enough, the floor was not so cold.

    I would personally spend $15-20K on putting heatpumps throughout the house, to heat the air.

    If this was not enough, I would buy a good pair of slippers.

    Paul.

  9. #9
    Join Date
    Jul 2006
    Location
    NZ, for now
    Posts
    572

    Default Something to keep an open eye on....

    One of the problems I have heard in the NZ underfloor heating market is the placement of the underfloor heating pipework can be too far apart.

    I have been told, but have not yet seen it for myself, that the pipework should be no further than 200mm apart.

    I assume that those providing a cheaper quote might be cutting corners in this manner, thus reducing the overall cost of the product, to gain the business, whilst making the final result fairly useless.

    Anyhow, just something to keep an eye on. We are certainly going down that track with our future NZ home... but are looking at installing a European "boiler" using wood pellets to produce our heating requirements. All the rage o/s.

  10. #10
    Join Date
    Aug 2006
    Location
    Hamilton
    Posts
    24

    Default

    thanks for your comments guys


 

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