sibsssidor
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For my BER cert the certifier insisted on original quotes and invoices from the company with the U-value specified. Luckily I'd saved them.They told me I have to get some sort of document from the company that fitted the windows. Luckily the company is still there, but after two emails and a couple of phone calls I did not get any help.
Same for mine, I found it a bit odd that they needed manufacturer verification but I presume they are only following SEAI guidance.(Vistatherm, EN 1279 Insulating Glass Units), together with the manufacturing date.
As above, that's not a 'make and model' of the full construction, it's a manufacturer name and a reference to the European standard that all insulated glass panels had to meet. All glass units from the best to the worst available had to meet that standard. The frames those units were put into varied significantly in energy performance too, and it is the performance of the package that counts.what kinda bothers me is that the make and model of the window is stamped inside the window itself (Vistatherm, EN 1279 Insulating Glass Units), together with the manufacturing date.
ThisPossibly more important questions, what makes you want to go with a heat pump? What's your current heat source, and how much energy are you using to heat the home?
@Leo tx Leo! I thought Vistatherm was the producer of the glass, but maybe they don't make the frames? I see the story is way more complicated than I thought. Don't see a way out of this without the supplier stepping in, I agree after 13 years they may not be able to help me. The house is rated B3 and has oil heating. I burn more or less 600 liters of oil per year. I've done external insulation, attic, fitted solar panels and heat recycling vents. The reason for looking at a heat pump is simply decarbonizing.As above, that's not a 'make and model' of the full construction, it's a manufacturer name and a reference to the European standard that all insulated glass panels had to meet. All glass units from the best to the worst available had to meet that standard. The frames those units were put into varied significantly in energy performance too, and it is the performance of the package that counts.
The only sure way to know the ratings is to have the manufacturer or supplier reference their records of what was produced and see if they have energy specifications that meet today's requirements. There's no requirement for them to retain such records for so long, so it is unlikely you will get them. After 13 years, the performance of the windows will have degraded.
What BER level did you achieve in the recent assessment?
Possibly more important questions, what makes you want to go with a heat pump? What's your current heat source, and how much energy are you using to heat the home?
What's the approx floor area of the house?The house is rated B3 and has oil heating. I burn more or less 600 liters of oil per year. I've done external insulation, attic, fitted solar panels and heat recycling vents. The reason for looking at a heat pump is simply decarbonizing.
Yeah, they produce a range of glass units with different performance levels, someone else adds a frame and frames also have different performance ratings, and both components factor into the overall efficiency score. So without the supplier confirming, you're unlikely to get anything better than the guided estimate.@Leo tx Leo! I thought Vistatherm was the producer of the glass, but maybe they don't make the frames? I see the story is way more complicated than I thought.
So I think you shouldn't need to prove better performance to qualify for the heat pump grant, isn't that available for C1 and above?The house is rated B3 and has oil heating.
Yes there's default values for everything they can't verify with invoices. For example, there's different default values for single glazed, double, triple etc, along with different defaults for the u value of the house walls based on the year it was built and the type of construction (different building regs depending on the year).No idea. They must have some default value for double glazed windows? :-|
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