Installing ducted A/C

Discussion in 'Renovation & Home Improvement' started by balwoges, 28th Jan, 2020.

Join Australia's most dynamic and respected property investment community
  1. balwoges

    balwoges Well-Known Member

    Joined:
    19th Jun, 2015
    Posts:
    1,116
    Location:
    Lake Macquarie
    Another sleepless night and I feel like hell ... :eek: so I am going to have ducted a/c installed. The upstairs of my house contains kitchen, family room, dining, lounge and 3 bedrooms. The house faces N/W with a lot of glass in the front. There is a wide covered verandah running the length of the house which is tiled and radiates heat into the front rooms, ATM I have an 12yr old a/c unit which keeps the lounge area cool but will need replacing before long.

    Am in the process of requesting a quote, any advice on what I should ask and expect?
     
    Last edited: 28th Jan, 2020
  2. willair

    willair Well-Known Member Premium Member

    Joined:
    30th Sep, 2009
    Posts:
    5,521
    Location:
    ..Village Idiot...
    None expert..Maybe just ask the question if you can run back to back split system's cost wise they would be less costly and once their gased up very little maintenance only filters imho....
     
  3. Paul@PFI

    [email protected] Tax Accounting + SMSF Business Plus Member

    Joined:
    18th Jun, 2015
    Posts:
    15,124
    Location:
    Sydney
    There are a variety of systems available. It can be more zone efficient to run ducted splits with a multi head unit if you use certain areas of the home and can "zone" effectively. They become cost inefficient at a point and full ducting can be better but may take up some space in each upstairs room as the downstairs needs ducting through the upstairs rooms. You could lose 250mm of wardrobe space in bedrooms as a example. Many basic ducted systems may be just upstairs and downstairs with a single return air and simple thermostat at the top of the stairs.

    Any AC installer who is well established in the trade will explain the options and costs. They will assess the size etc needed. They know they need to explain the cost trade off v's efficient and adequate.

    Get a few quotes.You will find pricing now is high. In June-August its cheaper. Your ceiling space is 70 degrees !!

    You may find that window tint may help the front glass.
     
    balwoges and willair like this.
  4. lightbulbmoment

    lightbulbmoment Well-Known Member

    Joined:
    21st Jun, 2015
    Posts:
    959
    Location:
    nsw
    You want to be requesting quotes in May for jun/ July install.
     
    moridog, balwoges and willair like this.
  5. balwoges

    balwoges Well-Known Member

    Joined:
    19th Jun, 2015
    Posts:
    1,116
    Location:
    Lake Macquarie
    Thanks for the tip re timing of installation, makes sense and there are only a few weeks left of Summer so will wait until later this year.
    Rooms downstairs are serviced by split system a/c so its only upstairs I will need to install the new system... :D
    Thanks again for the input
     
  6. Scott No Mates

    Scott No Mates Well-Known Member

    Joined:
    18th Jun, 2015
    Posts:
    20,323
    Location:
    Sydney or NSW or Australia
    I'd too suggest a multi-head split system (or two) that is one or two compressors which can then run 2 or 3 fan coils in the various rooms. This will provide the utmost flexibility as you can turn on one or more of the bedrooms or only the lounge/kitchen etc depending upon how you use the house.
     
  7. balwoges

    balwoges Well-Known Member

    Joined:
    19th Jun, 2015
    Posts:
    1,116
    Location:
    Lake Macquarie
    Think I will need 2 areas, one lounge/dining room, then one for each of the 3 bedrooms, the bedrooms are like ovens even though there are fans in each room ... thanks for the input
     
  8. Scott No Mates

    Scott No Mates Well-Known Member

    Joined:
    18th Jun, 2015
    Posts:
    20,323
    Location:
    Sydney or NSW or Australia
    That's pretty much how we broke it up, fans on 100% just for air circulation ac to supplement.
     
  9. SeafordSunshine

    SeafordSunshine Well-Known Member

    Joined:
    24th Jun, 2015
    Posts:
    756
    Location:
    Sydney
    As a temporary solution to cool down the tiles, sprinkle a light layer of water, this will cool down the house and the verandah.
    I do this when it is 'too hot' at the front of a west facing terrace house.
    I hope this helps
     
  10. bunkai

    bunkai Well-Known Member

    Joined:
    28th Jun, 2015
    Posts:
    783
    Location:
    Sydney
    As stated above - splits will be cheaper to run. Single splits are probably more advantageous at the cost of multiple physical external units.

    However, ducted should be quieter and more comfortable. Allows air to circulate through the house. Has the option to add an external air intake to bring cool outside air in overnight. Ducted also allows you to have rated filtration for smoke (PM2.5 etc) - worked brilliantly during the recent air quality issues.

    I have both ducted and a wall mounted split as ducted was not possible in one room. I much prefer the ducted but I know it costs more to run.
     
  11. Joynz

    Joynz Well-Known Member

    Joined:
    5th Apr, 2016
    Posts:
    4,468
    Location:
    Melbourne
    Could you use blinds along the verandah to lessen the heat load on the tiles and stop the radiating effect?
     
  12. ChrisP73

    ChrisP73 Well-Known Member

    Joined:
    5th Oct, 2018
    Posts:
    675
    Location:
    Brisbane
    If you can, keep the existing 12 yo unit for the lounge and have electrician wire it into an off-peak tariff. For example, in Qld with tarriff 33 you still get about 21 hours of service per day. But at cheaper rate. Even better effective rate saving during daylight hours if you have as PV feedin on you primary tarrif.
     
  13. balwoges

    balwoges Well-Known Member

    Joined:
    19th Jun, 2015
    Posts:
    1,116
    Location:
    Lake Macquarie
    Thanks for the suggestion, however we are on Level 2 Water Restrictions, need a hose to water the verandah and that's not allowed at the moment ... :eek:
     
  14. balwoges

    balwoges Well-Known Member

    Joined:
    19th Jun, 2015
    Posts:
    1,116
    Location:
    Lake Macquarie
    The upstairs/down stairs verandahs are fitted with ceiling to floor blinds which shade but dont keep the heat out ... thanks
     
  15. moridog

    moridog Well-Known Member

    Joined:
    18th Jun, 2015
    Posts:
    402
    Location:
    WA
    I don’t know anything about compressors and stuff, I got it installed in my granny flat, 70 sqm , from memory it was 7and a half K and it is wonderful. Being in Perth my real motivation was using it to cool,t but I was surprised at how often I use it to heat, it is super efficient and I would like it installed in the big house too!
     
  16. balwoges

    balwoges Well-Known Member

    Joined:
    19th Jun, 2015
    Posts:
    1,116
    Location:
    Lake Macquarie
    That's good to know :) am looking forward to having it next Summer!