HVAC – Heating Ventilation and Air Conditioning. The Heating and Cooling Systems are strong users of energy in your home, depending on the climate where you live. It is very important for both comfort and health and safety. SEER stands for “Seasonal Energy Efficiency Ratio”. A Ventilation System is used to provide fresh air, circulate it, and remove stale air at a specific rate. We can do an energy audit on your home or building and let you know how efficient your system is.