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What type of Heating to use

  • 10-07-2010 02:25PM
    #1
    firstbuild
    Closed Accounts Posts: 5 ✭


    Hi, i am about to start building and an looking at options on what heating system to install.
    I am going to fit solar panels but i do not like underfloor heating so i will be fitting radiators . i have heard a lot of bad stories about wood pelets with regard to storage and moisture.
    I would like to use a re-new able source but i do want something that is prove and does not have a massive capital cost.
    Does anyone have ideas or first hand experience that might aid me in the decision.


Comments

  • #2
    JohnnieK
    Registered Users, Registered Users 2 Posts: 2,526 ✭✭✭JohnnieK


    If you are getting solar panels then you should (if you can afford it) consider ground or air source heat pumps. These will only work well with underfloor heating though because of lower temps (if a heat pump goes at a high temp it is inefficient) or your rads will have to be sized correctly with a lower delta T and can work out to be a lot bigger than normal rads. You could also go for fan convector rads that are designed for heat pump systems. Make sure you get a proven company to do it if you do go down that road because the calculation have to be spot on when sizing and if they are n ot it can be very expensive to run. And remember you will need an electric immersion back up on your cylinder to increase the temp to 60oC once a week or two to help prevent legionella.

    If you have gas at your disposal then a gas condensing boiler with well controlled system is one of the most efficient systems out there and like wise the more the boiler condenses the more efficient it is. So a lower temperature in the system is the only way to go. Standard systems were calculated with a flow of 82oC and return of 71oC, with your system it could be designed with a flow of 75oC and return of 55oC to help keep the boiler condensing more.

    Wood pellets have gone quite expensive and unless you have good storage to buy in bulk it will be expensive to run.

    Remember GOOD INSULATION is the most important thing.

    John


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