Keeping your home at a pleasant temperature is essential to your enjoyment of your property. If your home is too hot or too cold, you will be struggling to concentrate with sweat dripping down your back or shivering with cold. To help regulate the temperature indoors, you probably have an HVAC system fitted that can provide heat or cooling air as the situation may demand. If the HVAC system is working well, you may not spend much time thinking about it, it only becomes the focus of your attention when a fault develops and you notice that the room has started to feel uncomfortable.