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]

Extension with heat pump or stick with gas

  • 03-08-2022 3:55pm
    Registered Users Posts: 8,861 ✭✭✭


    We are getting quotes for 2 story extension extension 63 sq metre coming in at 175 - 225k.

    One quote said we needed a new gas boiler and that would be 15k.

    I am thinking would it make sense of instead of getting a new gas number to go go for heat pump and then try and get a grant.

    The house is a 2012 build, BER B1, instead of cavity insulation the insulation is on the inside of the house. From what I can gather heat pumps work better (or only really work) if you can get your house up to BER A. I would appreciate any thoughts on this matter?

    Thanks in advance


  • Registered Users Posts: 1,323 ✭✭✭Nelbert

    A B1 BER is above the amount needed for the grant of 6.5k.

    Any new build / extension is likely to be a further improvement (think we ended up with 110mm plus insulation on our recent work for the extension and main house was upgraded to similar but not quite as deep (triple glazing and insulating floor got us to A3 overall).

    The grant likely means it's at least a cost neutral option to go HP Vs boiler.

    Heat pump is great for us, hot water all the time heating hasn't been on since the weather picked up in March / April.

    It takes a bit of adjustment and alter of expectations.... Your house will be at constant temp, so that blast of heat when you get home in winter won't be a thing it'll be a constant comfortable warm (she's warmed up to the concept now).

    My only regret with our work is not finding the bit of extra money for MVHR or something to cool the place down in the summer.

    When I get my shed rebuilt and some solar on its roof I'll feel better about the idea of getting an AC unit to cool main living space in the summer.

    For full replumb of house, extension, UFH downstairs and rads upstairs and heat pump install we were in the same ballpark as you but that was pre inflation pressure recently and pre increase in SEAI grant (though those things may offset for you).

    Also if you have a d/n meter you can get the heat pump to bring house to temp early in morning as you are getting up and then with your BER that good the low heat loss will mean any top up heat will be kept low.