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Triple Glaze and HRV

  • 11-07-2011 1:29pm
    #1
    Registered Users, Registered Users 2 Posts: 91 ✭✭


    Feel free to move if in wrong thread. I think if the price is right we might go with triple glazed windows. If not a very good double glaze of u value of 1.3 for the whole window not just the glass and the triple is 0.8 for whole window. I am just wondeering if we do go wtih triple would you have to put in HRV. Would it be a shame to have a house with triple glazed windows and no HRV. Does anyone have any idea has the price of HRV came down. We have a 2000 square foot bungalow. Are the day of trickle vents gone.

    thanks


Comments

  • Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    Katz83 wrote: »
    Feel free to move if in wrong thread. I think if the price is right we might go with triple glazed windows. If not a very good double glaze of u value of 1.3 for the whole window not just the glass and the triple is 0.8 for whole window. I am just wondeering if we do go wtih triple would you have to put in HRV. Would it be a shame to have a house with triple glazed windows and no HRV. Does anyone have any idea has the price of HRV came down. We have a 2000 square foot bungalow. Are the day of trickle vents gone.

    thanks
    Katz, there more too HRV than just windows, a good HRV system can be installed for less than 5g. BUT dont just look at this price in isolation, a holistic view of your build MUST be taken... may I strongly suggest you get a good arch or arch tech to spec and detail your house.. maximising your insulation and air-tightness... THEN when you go to look at your heating and ventilation strategy a HRV unit can be installed using the minimum energy.. there are homes that need very little heating beyond MHRV but you need to do more than install triple glazed windows.. no offence but your query screams of a lack of /or a poor consultant on your build. get some professional help..


  • Registered Users, Registered Users 2 Posts: 91 ✭✭Katz83


    BryanF wrote: »
    Katz, there more too HRV than just windows, a good HRV system can be installed for less than 5g. BUT dont just look at this price in isolation, a holistic view of your build MUST be taken... may I strongly suggest you get a good arch or arch tech to spec and detail your house.. maximising your insulation and air-tightness... THEN when you go to look at your heating and ventilation strategy a HRV unit can be installed using the minimum energy.. there are homes that need very little heating beyond MHRV but you need to do more than install triple glazed windows.. no offence but your query screams of a lack of /or a poor consultant on your build. get some professional help..

    I did get a provisional BER done we got a B2 rating very near a B1. That was with double glaze windows etc and no HRV and no air tightness test. We are going with oil and rads pipework already done. Stove with back boiler and also a wood burning stove. We are going with a 3 zoned heating system and all the usual stats. Solar panels. Pumped six inch cavity. 100m insolation under floor and i think 300 or 400m insolation in attic. We are putting that tape around the windows and when i find out the price of it we will decide as to whether to put that around the floors and ceiling as well. I am just trying to figure out or vetilation spec. If money wasnt an issue i would of gone passive but like most people these days that wansnt an option. Thanks for your reply sorry i didnt give enough information in my post .


  • Registered Users, Registered Users 2 Posts: 59 ✭✭mark2003


    No point in going to all that trouble of airtighting a house if you not going for hrv.You are still going to have 4" holes in some of your walls for ventilation and therefore your house will be far from airtight. the tape is very expensive @ 40euro a roll. I spent 450 euro just to seal 23 windows. What i would do is to fit pipes for the heat recovery in the house,so in the future you can block your 4" holes and install your heat recovery. Pipes will set you back 2,000 -2500 euro(depending on size of house). No need to tape all walls,floors and ceilings,just the windows,doors and ceiling of house.


  • Registered Users, Registered Users 2 Posts: 91 ✭✭Katz83


    mark2003 wrote: »
    No point in going to all that trouble of airtighting a house if you not going for hrv.You are still going to have 4" holes in some of your walls for ventilation and therefore your house will be far from airtight. the tape is very expensive @ 40euro a roll. I spent 450 euro just to seal 23 windows. What i would do is to fit pipes for the heat recovery in the house,so in the future you can block your 4" holes and install your heat recovery. Pipes will set you back 2,000 -2500 euro(depending on size of house). No need to tape all walls,floors and ceilings,just the windows,doors and ceiling of house.


    Just got quote back from Munster Joinery windows are 5900 and then 7900 with gradys. We are either going to go with gradsy and no HRV or go with Munster Joinery and put in HRV. Dont think we can afford both have to draw the line somewhere. Any advise as to which you would go with. the U value with Gradys in 1.3 and with Munster 1.5


  • Registered Users, Registered Users 2 Posts: 59 ✭✭mark2003


    Thats a good price for windows. You should ask previous customers that used both types of windows. You really have to decide what BER rating you want for the whole house. Its no point going for an A rated window and then decide go have C rated insulation or B rated doors. You could get a BER assessor to give you all the u-values for the materials of the house and that will determine the BER rating.Then you can easily decide what materials suit you. Aim for a B rated house(the better the rating the less cost to heat the house). Also you should ask previous customers that used both types of windows.


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  • Registered Users, Registered Users 2 Posts: 67 ✭✭AMG86


    With HRV you get fresh air throughout your house 24/7 along with a reduced heating cost. Fresh air is vital to healthy living. As outlined earlier you should try to do insulation, air tightness and ventilation to the highest standard possible. Spread the cost over a longer period than originally envisaged.


  • Registered Users, Registered Users 2 Posts: 12,822 ✭✭✭✭galwaytt


    Katz83 wrote: »
    I did get a provisional BER done we got a B2 rating very near a B1. That was with double glaze windows etc and no HRV and no air tightness test. .

    So, are you saying that a provisional BER with triple glazing, HRV and an airtightness test (what score btw..), came out and said you'd get an A2........or are you surmising...... ?

    Personally, I see houses getting A2 all the time with double glazing, so I'm failing to see the point of triple glazed (unless the premium is small).

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  • Registered Users, Registered Users 2 Posts: 85 ✭✭therightangle


    Katz83 wrote: »
    Just got quote back from Munster Joinery windows are 5900 and then 7900 with gradys. We are either going to go with gradsy and no HRV or go with Munster Joinery and put in HRV. Dont think we can afford both have to draw the line somewhere. Any advise as to which you would go with. the U value with Gradys in 1.3 and with Munster 1.5

    Katz83, in case you weren't aware, there's more to the energy efficiency of windows than just the U-value. A person with good BER knowledge can be consulted, and you could refer to:

    http://www.boards.ie/vbulletin/showthread.php?t=2056211189
    http://www.nsai.ie/Our-Services/Certification/Agrement-Certification/WEP-(Wind-Energy-Performance)-Scheme.aspx


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