HVAC Frequently Asked Questions

? What does HVAC stand for?

HVAC stands for Heating, Ventilation, and Air Conditioning. These systems regulate indoor temperature, humidity, and air quality to keep homes and businesses comfortable, healthy, and safe year-round.

? How long does an HVAC system typically last?

Most HVAC systems last between 8 and 15 years. Lifespan depends on factors such as system quality, usage habits, local climate, and how well the equipment is maintained. Routine professional maintenance can significantly extend system life.

? What is a MERV rating?

MERV stands for Minimum Efficiency Reporting Value. It measures how effectively an air filter captures airborne particles. Higher MERV ratings offer better filtration and improved indoor air quality, though the correct rating depends on your system’s design and airflow capacity.

? How often should HVAC maintenance be performed?

HVAC systems should be inspected and serviced at least twice per year. Heating systems are best serviced in the fall, while cooling systems should be checked in the spring to ensure peak performance during extreme temperatures.

? Where is my HVAC air filter located?

Air filters are commonly located inside the furnace or air handler, behind a return air grille, or within a dedicated filter slot. Filter location varies by system design.

? How do I know the correct air filter size?

The correct filter size is typically printed on the edge of the existing filter. If you’re unsure, your HVAC system manual or a professional technician can help identify the correct size.

? How often should air filters be replaced?

One-inch filters should be replaced monthly. Two-inch or high-capacity pleated filters can usually be replaced every two months. Regular replacement improves airflow, efficiency, and indoor air quality.

? What does the HVAC manufacturer warranty cover?

Manufacturer warranties typically cover functional parts such as compressors, blower motors, coils, control boards, and heat exchangers. Items like belts, fuses, and cosmetic components are usually excluded. Warranty terms vary by model and registration status.

? Is labor covered under the HVAC warranty?

Labor coverage is generally provided by the installing contractor, not the manufacturer. Coverage terms vary and are outlined in your warranty certificate or service agreement.

? Where can I find my system’s serial number?

The serial number is located on the rating plate sticker. For outdoor units, it’s typically on the back of the unit above the service valves. For furnaces, it’s usually inside the front access panel.

? What is the difference between standard and communicating thermostats?

Standard thermostats operate with basic on/off signals. Communicating thermostats allow two-way communication with the HVAC system, enabling advanced diagnostics, energy management, and more precise comfort control.

? What are thermostat alert codes?

Alert codes notify homeowners of system conditions, faults, or malfunctions. Some alerts are informational, while others indicate issues that require professional service. These codes help identify problems early and prevent system failure.

? When should an HVAC system be replaced?

Replacement should be considered if your system is over 8–15 years old, requires frequent repairs, produces uneven temperatures, or causes rising energy bills without changes in usage.

? How long does HVAC installation take?

Most standard HVAC installations are completed within one day. More complex systems or additional ductwork may extend the installation timeline.

? What are variable-speed and two-stage systems?

Variable-speed systems operate at lower speeds for longer cycles, providing consistent comfort and improved energy efficiency. Two-stage systems run at low or high capacity depending on temperature demands, offering better efficiency than single-stage units.

? What is a heat pump?

A heat pump provides both heating and cooling by transferring heat rather than generating it. Heat pumps are energy-efficient and ideal for moderate climates.

? How can indoor air quality be improved?

Indoor air quality can be improved through air filtration, electronic air cleaners, UV purification systems, and ventilation solutions. Some electronic air cleaners capture up to 99% of airborne particles as small as 0.3 microns.

? What is an HRV system?

An HRV (Heat Recovery Ventilator) exchanges stale indoor air with fresh outdoor air while maintaining indoor temperature balance. HRVs help manage humidity and improve air quality in tightly sealed homes.

? Should I wrap my outdoor air conditioning unit?

Fully wrapping an outdoor A/C unit is not recommended, as it can trap moisture and attract pests. A breathable cover designed for HVAC equipment is a safer option.

? How long do UV-C lamps last?

Most UV-C lamps remain effective for approximately 12 months, though some advanced models may last 2 to 4 years. Regular replacement ensures optimal performance.

? Do you offer HVAC maintenance plans?

Yes. Annual and bi-annual maintenance plans are available and include scheduled inspections, tune-ups, and priority service. Preventive maintenance improves system efficiency, reliability, and longevity.

? How can I contact your HVAC team?

For additional questions or to schedule service, call (843) 705-4822 or email brett.eason@tidelandsairconditioning.com. You may also visit our office at 83 Riley Farms Rd.,
Ridgeland, SC 29936 for in-person assistance.