Fixtures & faucets: Grohe - http://www.groheamerica.com/ Dornbracht - http://www.dornbracht.com/en/ Waterworks - http://www.waterworks.com/ American Standard - http://www.americanstandard-us.com/ Kohler - http://www.us.kohler.com/index.jsp Toto - http://www.totousa.com/ Elkay - http://www.elkayusa.com/ Newport Brass - http://www.brasstech.com/newport_index.cfm Porcher - http://www.porcher-us.com/Default.asp Chicago Faucets - http://www.chicagofaucets.com/catalog/res_kitchen.php Water heaters: Takagi - http://www.takagi.com/index.asp Bradford-White - http://www.bradfordwhite.com/residential.asp State Industries - http://www.statewaterheaters.com/ Water filters: AquaPure - http://www.aquapure.com/ MultiPure - http://www.multipure.com/ Heating: RPA - http://www.radiantpanelassociation.org/i4a/pages/index.cfm?pageid=1 Myson - http://www.mysoninc.com/ Munchkin Superstore - http://www.htproducts.com/lowres.html Veissmann - http://www.viessmann.com/com/en Runtal - http://www.runtalnorthamerica.com/ Prestige Solo - http://www.triangletube.com/CondensingBoilers/PrestigeOverview.htm Fire sprinkler: Home Fire Sprinkler Coalition - http://www.homefiresprinkler.org/hfsc.html Other resources: Green Building - http://builditgreen.org/ PHCC - http://www.caphcc.org/