AECB PHribbon

AECB PHribbon is a set of tools that run from an extra ribbon tab in Excel, just like ‘Insert’ or ‘Page Layout’. It includes the Window Tool and is available with or without REALcosting (Retrofit Economics).

• works within PHPP exactly like any other toolbar
• for new buildings and retrofits
• Simple, Variants and Step by Step retrofit costs
• designed for PHPP v9.6, beta versions available for v9.1 and 9.3. PC only.


Introduction Video (2 mins)

Build PHPP video (10 mins) 

More training videos are available on the download page 

  • 1 Select Climate – using a standard map or one with county boundaries
  • 2 Site – enter orientation and ventilation exposure
  • 3 U-values – 30 standard U-value construction build-ups you can use and edit, including 6 scenarios for each, wall tie calculations and option to write variants. Also includes timber fractions from BRE BR443. Also has variants option.
  • 4 k-values – choose build ups of k-values from a library, will open BBAs in Chrome or Internet Explorer to allow you to download. Includes values from PHPP manual, BRE BR443, EN 12524:2000, some SPAB in situ U-value tests for granite and limestone walls. You can add or modify values and create your own list groups.
  • 5 Window Tool – enters most of the info for a window on both the window and the shading tabs including, ‘1’s and ‘0’s, name, d reveal, o reveal, d over and o over. 
  • 6 Daylight Factor – writes PHPP info to Mark Siddall’s (LEAP) daylight factor spreadsheet.
  • 7 Energy of Variants – adds a “Graphs” tab and graphs variants broken down by walls, roof, etc
  • 8 Embodied CO2 – calculates the Embodied CO2 for any building based through a series of dialogues.
  • 9 Simple – adds retrofit costs of just the current PHPP
  • 10 Variants – find retrofit costs for a series of variants all at once
  • 11 Step By Step – retrofit in incremental stages, using variants.
  • 12 U-values – view/edit the U-values library
  • 13 k-values – view/edit k-value library
  • 14 Costs – view/edit retrofit costs library
  • 15 TBs – view the Thermal Bridges library
  • 16 Embodied CO2 – view/edit embodied CO2 library  


The basic new build version (£45) has tools 1 to 5, 7 and the associated libraries 12 and 13. You can download and buy from our download page. Extra modules are easily added:

For further information Contact: ◦ 01453 759466 ◦ 07531 288147

  • Indicative costs for retrofits: Simple, Variants and Step by Step (£30)
  • International version (no extra charge, user to provide local costs)
  • NEW! Daylight factor (£75)
  • NEW! Embodied CO2 (£20)
  • NEW! Google Docs shared libraries (opens in new tab), free

Screen Shots

Button 1

Helps you enter climate. Choose your climate from either the standard map or one with county boundaries.

Button 2

Helps you enter orientation and other site related data.

Button 3

Choose U-value build-ups from a library of up to 30. Copies to and from the library, can also set up 6 variants.

Button 4

Choose build ups of k-values from a library, with links to BBAs to download. The categories on the left are used to filter the list you see, the top 3 categories are fixed, the next 3 have useful common situations which you can customise yourself and the last 3 are entirely blank allowing you to create your own lists.

Button 5

The window tool helps you add windows by entering much of the data for you. On the windows tab it enters the dimensions, ‘1’s and ‘0’s and name. On the Shading tab it enters the d reveal, o reveal, d over and o over. It uses frame dimensions from the components tab to enter the d reveal as a formula so it will update if you change the window or frame dimensions. 

Button 6 Daylight Factor

This is a spreadsheet by Mark Siddall of LEAP. It helps you plan window sizes which give enough daylight without over-provision, even good windows have 5x the heat loss of a good wall. It writes a separate spreadsheet for calculating daylight factor and fills out the information that is known from the PHPP (the windows and frames). There then remains a small amount of further info to enter to obtain daylight factors for each room. 

Button 8 Embodied CO2

Embodied CO2 is the CO2 used to manufacture the materials used. This tool will do this in detail, down to the copper pipes, wires and ducting, but that is rarely necessary, sheet materials of the building fabric have a much larger impact. It is suitable for new build and retrofit and also works for variants as well.

Buttons 9-11

The AECB REALcosting software has been rewritten into 3 buttons that work directly in your PHPP: (6) without variants, (7) using Variants and (8) where each variants is a step of a retrofit. For each a costs tab is added to your PHPP and is custom written in front of you, it only contains the rows and columns relevant for your PHPP. Cells are entered as formulas so that as you develop your PHPP, the results change (though some large changes may require a re-run). It has all the features previously available in the various versions of REALcosting in one place, including co-benefits. Typically about 10 dialogues take you through costs for each of the U-value constructions, windows, services and some miscellaneous items. One of the dialogues is shown below on the completed sheet. Costs come from a central library of rates that can be edited and most quantities are determined from PHPP.

Button 15

Part of the Thermal Bridge Library is shown below, showing the construction build up for each calculation. Psi values are given for several different thicknesses of each configuration.

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