experimental prototype architecture i suggest that any specific designs which have not had formal evaluation should not be included as part of this article a casual reader may be mislead into believing that they would be able to reproduce these results see for an example of a very strict protocol for evaluation these examples may need further validation john hait's passive annual heat storage pahs method water walls and roof ponds australian deep cover earthed roof don stephens' annualized geo solar ags heating thermal buffer zone zero energy building