Hello

Right I’ve re-entered the 63 Nicholas Rd as “63 Nicholas Rd V2”

The only issues I can see are:

1. For some reason infiltration losses (called ventilation losses at the bottom of “Fabric”) are slightly different: 102 kW in the V2 but 115 kW in old version. I have double checked my entries in the Ventilation section and all element areas but see can’t see any differences. Maybe a second set of eyes would help.

2. The issue with energy system calc I have already shared in the github where space heat gas demand&fraction is “copied” across all gas supplied demands.

3. Cooking comes out as 804 kWh /yr in the Ccoop appliances list but as 989 kWh/yr in the Energy system. In addition this figure is not subtracted from the overall Ccoop appliances value so is effectively counted twice.

Not a huge number of problems. But this was just baseline. Haven’t had time to start looking at measures. This has taken 3 hours.

regards

Gervase Mangwana

Waxwing Energy
07956378981
[email protected]

Not clear where primary energy factors of 2.4 and 1.3 are from - most up to date factors are 1.22 for gas and 3.07 for electricity. See table 12 of SAP 2012 (this relates to issue 43 above about ensuring correct version of SAP is being used).

The text also needs to be clearer. By selecting this option it somewhat defeats 'fabric first' objectives (and means someone can go zero-carbon by switching to 'Good Energy' but doing nothing else, which is a bit of a nonsense). Householders need to be aware of this.

Also in 63 Nicholas

In addition I think the U-values for the elements I made for the roofs I don’t think are what they were when I entered the data. Interestingly they are set at 1.3 which is the U-value for our old friend CV1. I’m not 100% sure of this change but when I recalculated the U-values it came out at 3.4 so I don’t think I entered 1.3.

Please add field for number of habitable rooms not heated.

Need to be able to add ventilation systems as measures. eg, add a extract fans to the measures list or whole house systems (MEV, Passive or MVHR)

CARLOS TO ADD A LIBRARY IN THIS SECTION

MARIANNE NEEDS TO SEND A RUN DOWN OF LIBRARY ELEMENTS TO CARLOS

Party walls and floors need to have their own section on the fabric page - they're not treated in the same way as standard walls/ floors and only have a very limited number of possible u-values. Floors now have their own section but party walls also need separating out for ease of use.

WHEN APPLYING LIBRARY ELEMENT FOR EWI ENSURE THAT AREA VALUE IS MULTIPLIED BY 1.15

We need a better system of identifying when a system tag has already been used, otherwise things could be easily overwritten.

Now that the appliances section has been sorted in the main tool we don't need this duplicated in the household questionnaire and so it can be removed.

I have just added Fans and pumps to the Internal heat gains and have realized that (according SAP2012, table 5, p.215) some sources are missing: Metabolic and Losses.

carlos

When choosing gas boiler for water heating, cooking and space heating the fraction and demand has become the same in all and is the space heating demand/fraction. This of course makes overall gas demand very high.

Definitely needs sorting this

The winter and summer fields should be dropdowns. The options follows the existing dropdown box to the right.

Please could we separate out ventilation heat losses from infiltration heat losses. Quite important to understand the difference between these two - one is unintended heat loss through drughts, one is necessary (though can be mitigated depening on vent system).

Figures for fuel costs in current energy are different inputs than those in Energy system
Better if they are mapped together

Mostly when you try to edit an element that you already have entered in an assessment you are unable to change U-value and Tag. Sometimes you can and the change is made in the library itself but not in the assessment.
It is possible to edit them when using the same element in a different library.

I want to talk about this in a discussion about libraries on thursday.

Need to be able to display descriptive items for this in the measures list for the report, eg 'low flow shower head', 'low flow taps'.

CARLOS TO ADD A LIBRARY IN THIS SECTION

MARIANNE NEEDS TO SEND A RUN DOWN OF LIBRARY ELEMENTS TO CARLOS

Update SAP data tables (the most recent version of SAP v9.92) and change solar gains calculation. Eg Table U5. Check issues raised by Tom (see spreadsheet called 'Tom tests')

Hi Carlos,

We've come across a bug that needs to be fixed asap. It occurs when we try to add a measure to an element.

The screen shots below hopefully illustrate it clearly enough, but essentially when you go to apply a measure, come out of it, and then go back, the fields seem to have populated with the info for measure CV1 (one of Trystan's).

This happens whatever element you try to apply the measure to, and for both me and Gervase.

This is pretty high priority, as it's not possible for us to confidently apply measures until this is sorted.

Hope that's clear, but give me a call if it's not.

I'll be in the office til 5ish.

Thanks,

Marianne

eg monitors and master-switches

AP! CARLOS TO ADD UNDER APPLIANCES UNDER 'Appliances CarbonCoop calculation' NEW SUB-HEAD WITHIN APPLIANCES

MARIANNE NEEDS TO SEND A RUN DOWN OF LIBRARY ELEMENTS TO CARLOS

NO IMPACT ON CALCS

CARLOS ADD LIBRARY FUNCTIONALITY TO ENABLE MANUAL ADJUSTMENT OF THERMAL BRIDGING

Laundry and clothes drying facilities

AP! CARLOS TO ADD UNDER 'VENTILATION AND INFILTRATION' WITHOUT EFFECTING MODEL

MARIANNE NEEDS TO SEND A RUN DOWN OF LIBRARY ELEMENTS TO CARLOS

Coloured elements of tool not visible (tried in chrome, firefox and safari) Colour now visible in firefox, still not visible in chrome or safari.

Need a separate field for secondary space heating, as per SAP, with standard assumptions etc (may be multiple secondary space heating systems, so option to add more than one?). Could simply be a tick box that confirms which space heating system is 'secondary'.

Do in labelling on our notes for now - label which is primary and which is secondary heating. Something to look at for future feature.

I opened 63 Nicholas Road last week with Marianne and we found that in the Windows section of Fabric in the “subtract from” drop down every window had shifted up one in the drop down list. Also this list includes all elements including roofs and floors as well as walls. The selection glitch rotated through rotated through only the walls and floors. So "Front Brick” became “OUTRIGGER” and “Side Brick” became “Front Brick” etc.

The clothes washing section can go as this is covered under the main tool. However, please can we keep the clothes drying section - probably overkill to note the fraction? Maybe just tick boxes to note which get used instead?

Hi
Looking at Calla’s assessment (63 Nicholas road). I can’t quite figure out what is going on with the electricity demand. I’ve ticked and filled the “Appliances Carbon Co Op calc” in the extended input.

However in Energy System I can’t see how the figure for Appliances relates to that from the above calc. It seems way too much. But the figures at the bottom of the Carbon Co OP calc seem to relate to Primary energy only. So I’m not sure where its getting the number from.

In Core Input I have ticked sap calc for lighting but not for appliances and cooking.

Ok now I’ve just gone to check something to write here and the entire assessment has gone blank. Totally empty. Nada. Nichts. Rien. Zip. It is, you might say, an ex-assessment.

Tried refresh, closing tab and re-loading but still nothing.

I expect it is in there somewhere. Seems like a similar thing that happened to the assessment with my house.

There is a definite stability issue.

Best

Gervase Mangwana

Waxwing Energy
07956378981
[email protected]

Taps section: If you change the name or the type of flow reduction in one it makes them all the same.

Doors and Roof lights seem to be playing up. Specifically the parameters g,gl and ff disappear when using them in a different assessment (actually maybe in the same assessment in some circs. Then when you edit them other parameters drop out like Tag

Move water heating to core inputs section - at present may give non-expert users false impression, as water heating energy can easily be missed from assessment. Include in this an input field to provide an overide if actual water heating energy use is known (we know the SAP calculation is an approximation, which doesn't work for all).

Need to be able to apply particular draught-proofing measures

DECISION: CREATE NEW LIBRARY FOR THIS

AP! CARLOS - WHEN 'CALCULATE BASED ON AIR TIGHTNESS TEST' IS TICKED LIBRARY CAN BE APPLIED TO - AIR PERMEABILITY VALUE

Please add a field for assessor name. Add another field for assessor short biography.

Beneath assessment date

Need ability to add more than 1 shower.

Homepage not displaying as expected

In 5 Pev assessment

water heating demand in energy system is 49000kWh.

figures in water heating section don't seem to indicate this high demand

Ability to scroll across the page - this is particularly important for when we start to input assessments using tablets.

Loft Hatch and access hatches - new or refurbished; eg loft storage

TO BE APPLIED UNDER ROOF; ELEMENTS TO BE GIVEN AN AREA AND ADDED AS AN ELEMENT AND A MEASURE;

MARIANNE NEEDS TO SEND A RUN DOWN OF LIBRARY ELEMENTS TO CARLOS

NO IMPACT ON CALCS

Please add a field for name

The reference to non-transport in the headings is confusing - can this be removed?

The bars at the bottom need to be clearly labelled so that people can understand the difference between the set of information at the top of the page and the set below their actual usage figures.

It would be helpful to input generation and export tariff separately (and clearly identify which field is which)

Need to be clear on exactly what this is. Given current climate, and fact FIT rates are soon to be demolished, may be best to just omit any reference and base calculations solely on energy used on site vs imported from grid. (Another loose apostophe here too!)

eg Filling chimneys with insulation

ADD TO VENTILATION MEASURES

MARIANNE NEEDS TO SEND A RUN DOWN OF LIBRARY ELEMENTS TO CARLOS

NO IMPACT ON CALCS

Add “Fans and Pumps” adn “Renewables” to calculations

Not a biggie
When editing elements in windows library you only have to click edit and it closes. In other libraries you need to click finish after clicking edit.

Provide a link here to help find altitude of a site. E.g: http://www.daftlogic.com/sandbox-google-maps-find-altitude.htm (or if available from geovation tool, can use OS data) - informative only, not crucial.

Unclear as to how economy 7 type tariffs can be taken into account here - need a second/ third mains electricity field so different tariff can be entered for day/night electricity.

This still needs resolving - if you have already selected 'electricity - economy 7' you can't then select it again in order to add another rate.

Locking assessments to avoid accidental overwrite of data.

Hi

Looking at Calla’s assessment (63 Nicholas road). I can’t quite figure out what is going on with the electricity demand. I’ve ticked and filled the “Appliances Carbon Co Op calc” in the extended input.

However in Energy System I can’t see how the figure for Appliances relates to that from the above calc. It seems way too much. But the figures at the bottom of the Carbon Co OP calc seem to relate to Primary energy only. So I’m not sure where its getting the number from.

In Core Input I have ticked sap calc for lighting but not for appliances and cooking.

Ok now I’ve just gone to check something to write here and the entire assessment has gone blank. Totally empty. Nada. Nichts. Rien. Zip. It is, you might say, an ex-assessment

Tried refresh, closing tab and re-loading but still nothing.

I expect it is in there somewhere. Seems like a similar thing that happened to the assessment with my house.

There is a definite stability issue.

Best

Gervase Mangwana

Waxwing Energy
07956378981
[email protected]

At the very least we need to prompt people to check whether they need to adjust the heating efficiency based on table 4c of SAP (e.g. no boiler interlock).