Legally and practically this is true. I write “practically” because hardly anyone takes any notice of them and the few that do don’t influence the market with their quirky energy efficiency ideas.
EPCs were introduced with the intention of influencing the property market and pushing standards up. It hasn’t happened yet and now that their faults are widely known it is unlikely to ever happen.
Householders such as @Ben_Woodhams and I can console ourselves that our homes are better than that at the same time as we may be eligible for improvement grants, due to our low EPCs.
Personally I would be far more interested in my PHPP score than my rdEPC one.
Insulate your flat roof. Ideally to link with the existing roof insulation to avoid thermal bridging. The EPC does not seem to consider thermal bridging but if a job is done it should be done properly. This can be done from above or below depending on the state of the roof/ceiling and whether remedial work would be required soon anyway. Make up any missing depth below the current ceiling height. That’s a lot of work to get one or maybe 2 points.
Replace any remaining incandescent lights and old type fluorescent tubes with LEDs. One point max and probably not pertinent.
Rip up your ground floor, insert 300mm minimum insulation and make good. Sounds easy like that but isn’t. For EPC points you don’t need that much insulation but if you are doing it you may as well do it properly. My EPC surveyor gave me credit for the 50mm that could be seen through an airbrick. No one in their right mind would go to all that trouble and then not do a proper job.
I have solar thermal and PV, both installed in 2006, before RHI but they paid for themselves long ago. I had to privately import solar thermal parts from The Netherlands, you would have an easier job. Plan the installation in conjunction with the heat pump even if they aren’t done together. Otherwise you risk built in redundancy and the need to replace perfectly good components when phase 2 goes live. As well as energy saving you will not need so many accessory parts, and thus reduce costs, for the combined projects. 2 points.
I’m not sure that I would recommend PV to anyone that has an empty house during the day and a tight budget. If you can set appliances to run when the sun shines then that is anther matter. PV will help support heat pump running costs, the equivalent of having a small gas well under your house to assist your boiler.
The guiding principle of PV is to buy as much as you can afford. The benefits to EPC are justifiably not great as there is least PV in winter, when you need it most. 1 or 2 points, depending on system size.
PV with battery is another matter. FYI, battery = zero points. At least it isn’t negative.
If you have MVHR fit override switches in each extract room and tell the EPC surveyor that it is a manual system. Don’t mention MVHR. 6 points.
The overrides may even be useful at times
Edit: if you have a suspended floor you could consider Q-bot. They can apply multiple coats to build up to Passivhaus grade floor if conditions permit, and the floor doesn’t need lifting.
For technical reasons my house wasn’t suitable. They helpfully said if I carried out remedial work they could proceed but of course I would insulate for myself while doing the remedy!
I have just become aware of the Scottish government’s proposed changes to EPCs. Judging by previous Scottish initiatives England should be in a similar position within the next 10-20 years! (Call me a cynic if you want.)
Great detail @Tim_Gilbert . I’m slightly unsure about isolating extract vents in an MVHR system, as that would unbalance it. Did you have a particular time of year or scenario in mind?
Some recent research has shown EPC values have a higher impact the further north you go, for two main reasons (coolth and population density). But a property’s thermal performance might be becoming more important…
I’m afraid I didn’t make myself clear. I am not proposing any isolation of vents. Most, or maybe all, MVHR systems have optional hardware to boost airflow. Using the app with mine I can choose from 10 minutes to several hours. There are also manual override switches available, which I don’t have, for when an extra boost is needed for a quick removal of humidity or smells. If each room with an extract has a boost switch then it could be operated almost as an on demand ventilation system. In practice hopefully not, but what the householder gets up to when alone is not included in the survey.
I did consider saying and doing nothing and hoping the system isn’t noticed. If it is noticed you could say it’s en extract with a humidistat but that wouldn’t enable the system for smells.
My own system has a gradual auto increase function as the average extracted air humidity increases. Smells with transient causes disappear in a few minutes. I only need to boost if there is an ongoing source of smells (cooking dried fish comes to mind) or for purge ventilation overnight in excessively hot weather.
Having sent over £150k retro fitting a rural cottage, I was gobsmaked to find it only went up from and EPC F to and E… Underfloor insulation is probably the best way to get bang for your buck. I sort of wish we had done that, but there were other prioiities (Iike fixing the roof, but at least got Solar PV added to that!). If the rules state that you need a D or above to rent out then I’ll have to look at the underfloor insulation again - or install a wind turbine, which was the other helpful suggestion from the EPC report…
I take it you live in isolation on top of a mountain.
The rules for EPCs change, so your F to E may not be comparing like for like.
If you are EPC climbing you need a different retrofit plan than if you are trying to improve your thermal efficiency. There is an overlap but not as much as you might imagine.
To improve your EPC you need to do the list on the end of the certificate and ask the surveyor for an additional list in EPC points order. Many landlords have got this down to a fine art, putting the least possible money into the job.
If you can show that it is installed (photos and receipts) and the appropriate U value then it should get classified as IWI. (Don’t forget to do the window reveals.)
I’d confirm with the DEA prior to engaging them that they are willing to add the evidence needed for any non-standard U-value. It’s not difficult or time consuming to do in EPC software but some DEAs are of the “drive by” variety and just want to get in, out and submit as quickly as possible. A £35 price is usually a sign of that.
That’s true, although actual drive bys are hopefully a thing of the past.
When I was arranging my EPC I contacted several people and specified I was after a meaningful survey from which real improvements could be planned. I also outlined the work I had done and the evidence I had available. I had responses from 2, one of which subsequently ghosted me. I was happy with the one I engaged and the price paid (£120).
Hi everyone, my EPC surveyor doesn’t believe Aerotherm plastering would get us any points. However, he did propose a solution. It turns out that if you add specific models of heat pump into the calculation, then you get more points. For my house under the current regulations, adding a generic ASHP (where you don’t enter the brand) moves me all the way down to 60 (from 72), however adding a Samsung 8kW monobloc pushes me up to 75 (i.e. still a C). So this is great, and I should be able to get one!
Yes @Ben_Woodhams I too would be grateful to hear where I can find a table of heat pumps and by how much they will push up our EPC. We aren’t yet in a poosition to think seriously about ordering one, but the increase of the subsidy to £7,500 is very welcome. Mind you, @Tim_Gilbert, as you say it does seem as if aiming for a good PHPP result is likely to be infinitely more worthwhile in terms of reducing energy costs and carbon footprint than obtaining what seems to be a largely meaningless EPC score, unless one wants to rent one’s house out, or sell it soon. But if it is a choice between one make of heat pump and another at some stage, it would be good to know what their respective effects would be on an EPC.
Unfortunately I don’t know where a table of approved heat pumps is (maybe the BRE website somewhere?). I did this over a phone conversation with my EPC assessor and he was checking a list within his EPC writing software (not sure which one). Sorry not to be more helpful!
Any EPC certification needs to meet BRE requirements, so as you say, BRE is probably the place to look. The table, if any, is, in effect, a scale of recommendations, so it ought to be public but the BRE might have other ideas.
Edit: I have had a look on the BRE website and assume that what we are after is under “Domestic Annual Heat Pump System Efficiency (DAHPSE)” but I haven’t found it yet.
