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Air to Air or Air to water

  • 02-10-2022 11:21am
    Registered Users Posts: 94 ✭✭

    Good morning,

    I'm looking at a house built in the 1930's with a oil boiler twenty plus years old.

    I'm wondering if I buy the house and have to upgrade the heating system how much it would cost to install an Air to air or air to water system or which would be the best solution?

    The house is 1400 square foot with 7 rooms and two bathrooms.

    I guess I would have to replace rads also?



  • Registered Users Posts: 72 ✭✭Punchin A Keyboard

    I would do neither until you have checked the insulation and windows/doors and general air tightness to see if they are up to scratch. If you do wind up getting some insulation be mindful of ventilation. The bills can rack up.

    Then you can think about a heat pump even though the newest of ashps can do 75c water without hitting the backup electric element. Personally I would only do air to air in climates that flip between extremes. It all depends on your hot water demands.

  • Registered Users Posts: 1,327 ✭✭✭Nelbert

    Above is spot on. The biggest cost here is not the heat pump no matter which you go for. Insulation to keep the heat you put in to the house is the main thing.

    That aside. Air to water makes more sense for both heating and hot water. Air to air is essentially air conditioning to heat or cool a space so you'd need something for hot water then.

    Although if you insulate well enough and have south facing glazing you'll end up like me and be considering an air to air to serve as an air conditioner in the summer!

  • Registered Users Posts: 1,922 ✭✭✭jkforde

    afaik, SEAI grant demands the same re. insulation, airtightness, minimum BER of A3, it's all on their website. be careful is my advice.

    🌦️ 6.7kwp, 45°, SSW, mid-Galway 🌦️