Emergency HVAC Derry

Frequently Asked Questions About Emergency HVAC Services

What is a humidifier, and should I use one with my HVAC system?

A humidifier helps prevent dry air. Dry air can make your home feel colder than it actually is. A humidifier can work with your HVAC system to maintain comfortable humidity levels throughout your home. Some HVAC systems have built-in humidifiers, or you can have a stand-alone unit installed.

What is a zoning system, and do I need one?

A zoning system divides your home into separate zones that can be separately controlled. This provides more precise temperature control and can save you energy by only conditioning the occupied areas of your home. Zoning systems are a good option for large homes or for areas with inconsistent temperatures.

What's the difference between a single-stage and two-stage furnace?

Single-stage furnaces have one level of heat output. They run at full capacity creating a cycle of on-and-off operation that can lead to temperature fluctuations. Two-stage furnaces have two levels of heat output: a lower setting for milder weather and a higher setting for colder conditions. This provides more consistent temperatures, better efficiency, and quieter operation.

How often should I replace my AC unit?

Air conditioners typically last around 15 years with proper maintenance. If your unit is getting old and inefficient, or if it requires frequent repairs, consider replacing it.