If you have a new account but are having problems posting or verifying your account, please email us on [email protected] for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact [email protected]

solar thermal collectors help..

  • 29-03-2022 12:28pm
    Registered Users Posts: 1,831 ✭✭✭

    Hi all,

    I have a gravity feed system in my house.

    I have a stove that gives us heat and hot water all winter and I have a condensing boiler which we use mainly to only heat our hot water in the summer.

    Im wondering what I could get to heat the hot water without having to turn on the boiler everyday..

    My tank is a 300l insulated Joule cyclone.


  • Registered Users Posts: 2,530 ✭✭✭Car99

    How many coils in your 300L cylinder and how many are being used?

  • Registered Users Posts: 1,831 ✭✭✭keano25

    3 coils, one for solid fuel and one being used for boiler. One free.

  • Registered Users Posts: 3,329 ✭✭✭randombar

    I know the solar thermal isn't really talked about any more, if you could pick up a very cheap system it might be worth it but there is some maintenance in them to be fair.

  • Registered Users Posts: 1,831 ✭✭✭keano25

    What's recommend now instead?

  • Registered Users Posts: 622 ✭✭✭bunderoon

    If you have triple coiled cylinder then you are half way there for solar tubes. Its the cheapest way to heat water.

    And the grant of 1,200 is still available

    What is your roof orientation? North/South East/West ?

    Do you have heating zones?

    I have the Joule triple coil cylinder and including boiler stove. So more or less the same setup as yourself.

    I am looking to get a system this year. Have put it off for many years.

  • Advertisement
  • Registered Users Posts: 1,831 ✭✭✭keano25


    The back of my house gets sun all day..

    I have three zones, living, bedrooms and hot water.

    Any idea with grant how much tubes are costing?

    In relation to your stove if we had solar fitted heating the hot water the radiators would in turn heat up a lot faster.

  • Moderators, Home & Garden Moderators Posts: 5,514 Mod ✭✭✭✭graememk

    The Domestic hot water will heat up a lot faster, It wouldnt really effect the radiators much at all.

  • Registered Users Posts: 1,831 ✭✭✭keano25

    Well when I light my stove the bones of the first 45 minutes to an hour is spent dumping hot water into the hot water tank.. then my rads heat up.

    If I turn on the oil for half an hour heating the hot water before I light my stove my rads are warm within 30 minutes.

  • Registered Users Posts: 622 ✭✭✭bunderoon

    Your stove needs to heat its own water tank before then using the top water egress pipe at the back of the stove to gravity feed & start heating the tank. Your oil burner ( just like everyone's) will heat the water in the cylinder faster as its more direct.

    Depending on the roof etc, I'd expect the grant to swallow up the cost of the installation. 1,200e which is generous.

    I'm a North East/ South West facing and have a 300Ltr Joule triple coil and I have been told that I would need 40 tubes, which I understand.

    A 40 tube Joule kit would be ~2300e give or take.

  • Registered Users Posts: 1,831 ✭✭✭keano25

    So at that the cost for you to install solar would be around €1100 labour included?

  • Advertisement
  • Registered Users Posts: 622 ✭✭✭bunderoon

    about that. I need to get new quotes. But its a 1 day job. So it should be more than enough for me. Depends on your house etc. You'd have to get someone out and access.

  • Registered Users Posts: 1,831 ✭✭✭keano25

    Ya definitely have to get someone bout to price it up.. with the weather what it is the last two weeks it would make life very comfortable to have hot water on tap

  • Registered Users Posts: 104 ✭✭Silver Breeze

    I have a Joule A Capella unit on the roof, installed here in Dun Laoghaire in late 2014. The installers returned a year later, checked/topped up the blue glycol, checked pressure in the system, 300 litre tank has three elements. All good. The installers have retired/gone bust/emigrated/whatever, their phones are off.

    Can anyone recommend someone who can service the unit? Untouched since late 2015.

    Many thanks...