hi, everyone. i am a homeowner subscribing to this forum to get advice as i investigate hvac systems for our home. i am a father of two young girls, living with them and my patient wife in the mountain west...increasingly hotter these days (half of it is on fire this summer it seems) - and we live in a great house that has a really old furnace (that works well) but no a/c. we are thinking of trying to get air conditioning (and a new furnace at the same time - ours is a mfg. 1978 rheem), but our budget is tight. i've been learning some of the hvac terminology - bear with me. thanks for any help anyone can offer.