Is this a scam? It seems pretty suspicious.Tall_Kayak_Guy t1_j9ykwhn wrote
Reply to comment by Bodvarr in Is this a scam? It seems pretty suspicious. by Bodvarr
It's a two piece plastic whistle that you pierce through your furnace filter. When the filter becomes clogged, it forces more air through the plastic piece and makes an annoying whistle noise (most likely at 2:00 AM!).
Viewing a single comment thread. View all comments