How do I bathroom / kitchen / extension? etc.

Anyone used PHPP and done or looked into EnerPHit certification?

I'm increasingly thinking that if we're going nearly all the way anyway we might as well go all in and spray the outside of our house with Passive Purple which will get the neighbours talking.

But paying the best part of £200 for a massive multi-tab 7.9Mb unfriendly Excel spreadsheet* is not an attractive prospect, especially when I basically want to have a play with it to help me decide whether we go that route or not.

*In the words of this blog post which also contains the wonderful line

"And finally, being in Excel means it’s a dead model; you might as well print it out on a piece of paper and nail to a tree in the rain."