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Found 6 results

  1. So my new PCM58 has arrived (see for why I have a new one): And the new one has an energy efficiency sticker on it: Show only grade C - which is well below my expectation. Anyone know why it is given such a poor mark, I thought one of the key selling points was it was a super highly insulated way of storing heat.
  2. Most of us calculate Design EPC numbers using the free FSAP software from Stroma. This is a thread for help and questions, since I may be about to ask a few. Ferdinand
  3. Still considering my heating options (see here) and looking at the RHI on an ASHP, I see that I need to get a new EPC as the other one I have is more than 2yrs old and the rating at the end of the highly useful report? tells me it an ' E' (46). So I would need to get a new assessment done before I have the ASHP fitted (should I indeed go that route). If I do decide to go down the ASHP route, then I want to get that installed at the same time as all the rest of the plumbing systems and not have the mess/extra labour visits/costs to fit an ASHP after the house is 'complete'. As of today, I have a shell of a house still. Would they still be able to undertake an assessment? Windows and doors in, so that'll be a tick for the 'doubled glazed' box on the assessor's sheet and I get a gold star for the panels on the roof. But I have no heating, the loft is bare (no insulation), old crappy CWI is mostly gone, so my efficiency rating would probably be closer to an F than an D! In terms of the RHI, that appears to be based on the total heat demand - but how is that assessed if I have no heating installed yet? Do I just inform the assessor that I will be fitting UVC/ST/Sunamp/re-instating the old oil boiler?
  4. I know that most people here are building homes that will far exceed the minimum standards required by Part L of the Building Regulations (Part L = conservation of fuel & power) I finished my own build about a year ago - it's a small 2 bed holiday home on a remote site in N Wales and I decided to build it to just meet the minimum standards allowable in Part L and I thought it may be useful to give those of you who are exceeding Part L requirements an example of minimum compliance for comparison purposes. It's a single storey timber frame and timber clad bungalow with a net internal area of 71 m2 and an internal heated volume of 234 m3 (we've exposed the pitch of the roof internally). It's a rectangular shape on plan as it's built along the contour of a 1:8 sloping site. (Small rectangular bungalows are about the worst shape for energy efficiency). It's heated by bulk LPG and a combi boiler. No PV or other renewables. Naturally ventilated with no MVHR. These are my SAP figures: EPC C71 [Edit to add EI Rating of B81] Averaged (area weighted) 'U' values for walls, floor and roof of 0.15 Actual 'U' values are: floor 0.1 (we have a ground bearing conc slab with Hive app controlled underfloor heating and 300mm of EPS under the concrete) walls: 0.21 (minimum allowed in Welsh regs). Roof: 0.13 Windows 3G 0.8 Air test actual figure of 3.7 m3/(h.m2) (no special tapes or air tightness layer) Energy demand figures from the SAP calculation: Heating demand 3400 kWh (this equals 47.9 kWh/sqM of internal area) Hot water: 2290 kWh Electric for pumps and fans: 120 kWh Electric for lighting: 314 kWh (all LED) Primary Energy Demand: 106.1 kWh/sqM/year [Edit to add: CO2 emissions: 1,596 kg/yr CO2 emissions: 22.49 kg/m2] The house is warm and draught free. The things I like most about it apart from the location and spectacular views are the open plan layout with tall 'cathedral' ceilings, the u/floor heating and the 3G windows. I'd be very interested in seeing comparative figures for your own builds. Ian
  5. A quick EPC question to which I cannot find an answer. What would be an EPC value for a typical "building regs minimum" newbuild property? I did however find numbers for how EPC values have changed over the last 20 years. Right direction, more still to do. Source: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/627688/Potential_stock_improvements_Report_2015-16.pdf
  6. This is mainly for @Crofter, depending on how Wee the new Hoose actually is - put here in case anyone else finds it. In England, detached buildings under 50sqm are exempt from having an EPC done. https://www.gov.uk/energy-performance-certificate-commercial-property/exemptions If it is also so in Scotland, that could save you a little money and hassle - if you are under 50sqm and so minded. I have one under 50sqm - the detached 48sqm cottage my dad was born in, which is now a rental. I have the EPC number up to 51, and the half of it which has been drylined since about 1984 (25mm eps) was ignored by the EPC man, but that is about the limit of what is achievable practically. When push comes to shove in 2026 I will rely on the exemption rather than make a "too expensive to upgrade it" argument. Ferdinand