Where is the A/C

While most of North America is probably enjoying temperate - Spring weather, we are just getting into the hottest part of the dry season here in Nicaragua. When we lived in the States, Bethany and I would always hold out as long as we could before we would turn on the A/C in the summer. Invariably a day would come that was just too hot, and we would look at each other and say "it's time". Well today was that day here. It was 104 degrees in the shade, and the sun was intense because we are much closer to the equator. So, we both looked at each other and said "it's time". That was at about 10:00 this morning and it is now 5:30 pm. We have been looking all day for the thermostat or the air conditioner unit. We can't find either one. We can't find any air registers or signs of ventilation ducting. It as if this house does not have an HVAC system. I guess we will have to suffer one night here without A/C, but tomorrow I am going to ask the landlord to show me where this inconspicuous HVAC system is hiding. There has to be one...Right?