Blow hot! Blow cold! This is not good in a relationship, nor is it good in a living space! you cannot hope to feel comfortable in a space where there are constant crests and troughs that are created in the temperature and also in the way in which a place is ventilated. Even today, one of the most common forms of torture is to place a person in a chamber that has no ventilation or has rapidly changing temperatures. The key to all this is the word balance: you need to have balanced ventilation, which means that there should be separate systems that drive the inflow and the outflow of air in and from a building. This is the only way you can ensure that fresh air comes in and the stale air gets removed at periodic intervals.
Exhaust Fans
You would generally find small fans that remove the stale air from a room and pass it either outside or into a vent from which it finds its way out. These exhaust fans function in two main ways: one is that they suction out the air from inside and room and secondly, they ensure that the air thus suctioned does not find its way back in. This is made possible only with the shape and size of the rotor blades that keep whizzing in a circular motion at very high speed. This motion causes a kind of swirling vacuum to be created in the room. Of course, you must remember that if it is a huge and spacious room, then you would need a huge exhaust fan. The size of the fan is directly proportionate to the size of the room. In some large rooms, there could be more than one such fan installed.
Heat Recovery
This is the latest technology to be adopted in the HVAC (check out these AC Repair incoming services) sector and involves a synergistic way of functioning. To put it very simply, the outgoing and air is treated by a bit of equipment that is called the heat exchanger. What happens is that the heat that is coming in is preconditioned before coming in. This helps quite a bit in a cold climate and does not strain the equipment to deal with the extreme cold.
It is important to remember here that whatever may be the way in which you are going to ensure good ventilation, the system has to be energy efficient. There is no point in spending a lot of money in sustaining a ventilating system.