HVAC Appliances should be maintained, adjusted, and inspected regularly to ensure optimum performance, efficiency and safety. New generation models are designed for custom set up in conjunction with other equipment to work as they were intended. Fan settings must be adjusted for proper temperature rise across the furnace as per manufacturers specs and these points are often overlooked. I often find upon inspecting systems of new clients this initial set-up was never completed properly or correctly. Air Conditioning must be tuned in conjunction with the furnace fan as well to provide the airflow required for efficient cooling and de-humidification, depending on the type of refrigerant system and duct/filter restriction. If this is not properly set the unit may cool quicker than it dehumidifies leaving the home cool, but very damp. Certain tests are conducted during a maintenance service to adjust and ensure these settings are achieved and maintained regularly.
Burners, sensors and pilot are cleaned. Gas pressures are checked and adjusted if necessary. Code requirements and new updates are considered. Amperage draws and performance of electrical parts are tested to ensure proper performance. A Combustion Efficiency test is taken and printed, indicating combustion properties important in diagnosing problems such as a cracked heat exchanger, adjustment for optimum efficiency is done, and determining if the unit is operating safely, or needs replacement. A Carbon Monoxide (CO) test is also conducted to ensure the fuel is burning safely within your home.
The AC coil, secondary heating coil,and furnace fan is also checked for buildup of dust, and if required, pulled and washed (extra charge may apply) These should not be this dirty if proper filter maintenance is upheld. A proper filter and regular maintenance prevents build up on these areas.
Lack of monthly filter maintenance, or using different rated filters at different times of the year can also be an issue. Once the fan is adjusted properly for heating and cooling separately using a recommended filter for all seasons, and the filter is replaced regularly (monthly), there is no reason to use different types or ratings of filters. If you have central air, I would never recommend a fiberglass filter as it will allow dirt to pass through and accumulate on the air conditioning coil surface causing restriction issues, which may affect the cooling ability, cause water damage, or permanently damage the furnace heat exchanger or other parts during the heating season.
HRV’s are often overlooked and presumed operational, however I have found that most have either not been balanced at the time they were installed or the unit contains debris build up on fan blades, screens, filters, and hoods which have now restricted airflow in the system and caused a change in airflow from the point of set-up. The principal of an HRV system is to exchange a required amount of air into and out of the home, and this level must match.