Latest Batches of Panels down in price

[Gavin A]

I guess it does depend on a lot of other stuff as well like loft insulation, condensing gas boiler, heating controls, thermostatic rad valves, double glazing, low energy lighting etc etc. so D would certainly be possible for a solid wall house, particularly once you add PV into the mix.

 

[Eco Deal]

There are EPC loop holes !!! as an EPC is just on BIG SAP calculation which if you did manually it would takes weeks

hence software

 

[Eco Deal]

I guess it does depend on a lot of other stuff as well like loft insulation, condensing gas boiler, heating controls, thermostatic rad valves, double glazing, low energy lighting etc etc. so D would certainly be possible for a solid wall house, particularly once you add PV into the mix.

solar pv does not add more than 5 points on at most

 

[Eco Deal]

I will do a standard house Detached 1960's with no energy efficent products then I will slowly add items like loft insulation and cavity wall insualltion , energy bulbs , pv and I will post my finding on here so we can get an Idea of Points per Item on a standard house.

 

[Gavin A]

I may be wrong, but I understood it that the points per item actually changes depending on other items. So in the house with the solid walls it would gain more points for having a condensing gas boiler than a house with cavity wall insulation would gain from having a condensing gas boiler, because the heat demand would be higher so there would be more direct gains from the more efficient boiler... etc.

At least I'm sure that's what our EPC guy was saying.

 

[babba]

May be hope for us all yet...

 

[SRE]

I may be wrong, but I understood it that the points per item actually changes depending on other items. So in the house with the solid walls it would gain more points for having a condensing gas boiler than a house with cavity wall insulation would gain from having a condensing gas boiler, because the heat demand would be higher so there would be more direct gains from the more efficient boiler... etc.

At least I'm sure that's what our EPC guy was saying.

You're right - it's different for every house but ball park figures will at least give us an idea of what we're looking for. I should be ok but there's loads fo people who won't know where to start.

 

[yorkshiremike]

Will be interested to see what you come up with. I'm currrently taking a DEA course and the instructor was incredulous when I assessed my own house as it's a 3 bed 1955 semi and with a 4kWp PV system (it also has all LED lights, cavity insulation, 300mm loft insulation etc) it comes out at 92 (A rated) - there aren't any 1955 houses in the database at A, which is why he is incredulous. I haven't mis entered any data (at least that anyone has found yet), but the rdSAP software (current version, not post April changes) is adding 17 points on for the PV taking it from a mid C rating (75) to lower A. Even a more typical 2.5kWp system would have added 9 points, whereas it looks like going from 0 to 100% low energy lighting only adds 1-2 points.

 

[Eco Deal]

It does depend on 1000's of factors I will do it just to get a basic Idea !