I would visit my grandma every holiday and weekend whenever my parents would let me. The fact that she lived near our townhouse made it easier for me to pop into her home as much as I liked. Sometimes my parents would accompany me, and other times my older brother would agree to take me since I was not allowed to go alone until I was a bit older. Over the early years of my life, I remember grandma’s AC being better than ours. Her home always seemed to be cooler than urs in summer, and I wondered why this was so. So one day, as we relaxed out in the gardens, I asked her what her secret was. My home’s HVAC system was fine, but grandmas seemed better. The air inside her home also felt crisp and fresh no matter the season. It turns out that she did not joke with the unit’s maintenance. She went out of her way to clean it regularly, sometimes even more than she should have. She had a maintenance routine that she willingly and happily showed to me. I remember reading the list of activities and noting with amazement how she would clean the air vents every three weeks. The air filters were switched every week, the reason being that our neighborhood was quite dusty. She was also extra clean and ensured that her house was always clean even when the pets were allowed to get in the few times I saw them. My grandma believed that cleanliness was the secret to a good environment. To top it up, she ensured the HVAC technician that serviced our unit also visited her home for a professional tuneup twice a year.