12 Tips for HVAC Maintenance

12 Tips for HVAC Maintenance

Heating, ventilating and air conditioning (HVAC) is the technology of indoor and outdoor environmental comfort. Holistically, it aims to provide good air quality and thermal comfort, thereby regulating all aspects of the environment around you. Professionals and layman alike need to ensure that HVAC maintenance is carried out well for residential, commercial and industrial areas.

The following pointers will help provide insight into HVAC maintenance:

Air Filters

Use high-efficiency pleated filters. These should ideally be changed every month or 1-3 times a year for filters with higher efficiency. Similarly, disposable fiberglass filters should be avoided at all costs. Regular maintenance can lower your air conditioner’s energy consumption by up to 15%.

Condensing Units

These should be kept free of grass, leaves and other debris. Home owners should also spray pesticide around the base of the unit once a month to keep out insects. In addition, condensing coils should be washed properly in warmer months.

Air Supply Grilles

Care should be taken to ensure that these are kept wide open at all times. Some people close off the grilles in unused rooms. This practice should be avoided since it can damage your HVAC system.


It is better to use programmable thermostats for greater efficiency and automatic temperature adjustments. In particular, the system should not be turned off for a long period of time since this will create greater temperature fluctuations throughout the day.


It is important to clean your drains periodically. A clogged drainage system wastes as much energy as a dirty filter since more energy is used to send out relatively warmer air.

Condenser Fans

Home owners should clean fan blades in all indoor and outdoor units. This will maintain the units’ capacity to cool air efficiently since dust and build up from evaporator coils will be removed.

Open Spaces

Seal off all heating and cooling ducts, as well as any nooks and crannies. These include spaces around doors and windows as well. The less air that escapes your house, the easier it will be to maintain and regulate internal temperature. It will also ensure that your HVAC system can function as efficiently as possible by minimizing energy wastage.

Cooling Equipment Settings

Preventive maintenance for this includes measuring your refrigerant charge and correcting wherever necessary. This will inevitably save 5-10% of cooling costs. Your direct pressure system should be regulated according to the superheat temperature, whereas the thermal expansion valve should have a degree of cooling as per manufacturer’s specifications.


These can be corrected by using simple screw or latch replacements, repairing gaskets, putting back missing screws and fixing loose access panels. Condensate drain pipes should also be maintained by recharging P-traps or U-bend water traps.


These should be checked for malfunctions which may include a jammed outside damper, poor linkage, a faulty actuator or imprecise air temperature sensors. During mechanical cooling, you should ascertain that the economizer is set at the minimum outdoor settings. You may also need to watch the damper and recalibrate it if necessary.

Heat Losses

Home owners should ensure that the heat exchanger has no faults and is not clogged by debris. If not replaced, this can lead to the release of harmful gases such as carbon monoxide entering the indoor air.


For technical maintenance, it is best to hire HVAC experts. They can conduct yearly check-ups, disassemble units and provide servicing as and when needed.

Overall, the importance of preventive and corrective HVAC maintenance cannot be undermined at any cost. This is because the entire system is costly, and in case of faults, it may require extensive upgradation or revamping of several major parts. Home owners should therefore conduct such maintenance regularly and thoroughly for better energy-efficiency and cost-efficiency.

Espana Gomez is an author of this blog. Recently she works as an interior design assistant in her town. She loves daydreaming about beautiful homes and interior decor.