> > Interesting. > I've had good results over decades with ionisation type detectors and hav= e > found photoelectric ones less sensitive than I'd like. > > I had intended to do an informal test of various detectors and locations > "sometime" / manana (manana manana?) . > I don't know what kind of smoke detectors we have. but they definitely work since they trip pretty often when cooking. That's our "periodic test." Harold --=20 FCC Rules Updated Daily at http://www.hallikainen.com Not sent from an iPhone. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .