What Is EM Heat on the Thermostat?
As Atlanta families prepare for the colder months, understanding your home's heating system becomes essential. One term you may have noticed on your thermostat is EM Heat or emergency heat. But what exactly does it mean, and when should you use it?
What Is EM Heat?
EM Heat, short for emergency heat, is a secondary heating system designed to keep your home warm when your heat pump can no longer function efficiently. While your heat pump is the primary source of heating, EM Heat steps in as a backup during extreme weather or mechanical issues. This feature ensures that no matter how cold it gets in Atlanta, your family can stay cozy and comfortable.
How Does EM Heat Work?
Heat pumps typically operate by drawing heat from the outdoor air and transferring it into your home, even in cooler temperatures. However, when the temperature drops below freezing—something Atlanta experiences on occasion—your heat pump might struggle to extract enough heat.
That's where EM Heat comes in. Unlike the heat pump, EM Heat relies on a secondary source, such as:
- Electric resistance heating
- A gas furnace
This backup heating system is reliable, but it consumes more energy, making it less efficient than your heat pump.
When Does a Heat Pump Switch to Emergency Heat?
Your heating system is smart and usually switches to emergency heat automatically when necessary. Here are the most common scenarios:
- Extremely Cold Weather: If the temperature dips into the 20s or below, your heat pump may need help keeping your home warm.
- Heat Pump Malfunctions: If your heat pump stops working entirely, EM Heat ensures your home stays heated until repairs are made.
- Ice or Frost Build-Up: Frost or ice on your outdoor unit might prevent the heat pump from functioning. EM Heat provides consistent warmth while your system defrosts.
When Should You Manually Turn on Emergency Heat?
In some cases, you may need to switch to emergency heat manually. This is uncommon, but it can happen during:
- Heat Pump Failure: If your system isn't heating your home, activating EM Heat keeps your family warm until a technician arrives.
- Unusually Cold Nights: On rare occasions when Atlanta temperatures plummet, your heat pump may struggle to maintain adequate warmth.
For example, imagine waking up to a cold house on a brisk Atlanta morning. If your heat pump isn't functioning, switching to EM Heat can offer immediate relief while you wait for repairs.
How Does EM Heat Affect Energy Costs?
One important thing to know about EM Heat is that it uses more energy than your heat pump. While your heat pump is designed to efficiently transfer heat, EM Heat relies on energy-intensive systems, like electric resistance heating or gas furnaces.
Here's a quick comparison:
- Running your heat pump might cost $0.50 per hour.
- Using EM Heat could cost $2.00 per hour or more.
Because of this, it's best to reserve EM Heat for emergencies or short-term use.
Emergency Heat vs. Heat Pump Mode
Understanding the difference between these two modes is key to optimizing your heating system:
- Heat Pump Mode: Transfers heat from the air, even in cold weather. It's energy-efficient and ideal for daily use.
- Emergency Heat Mode: Uses a backup heating system, bypassing the heat pump entirely. It's reliable but less efficient.
While both modes serve a purpose, using EM Heat wisely helps keep your energy bills under control.
Clearing Up Myths About Emergency Heat
Many homeowners mistakenly believe that EM Heat should be used whenever the temperature drops below freezing. In reality, it's only meant for situations where the heat pump can't keep up.
Another common myth is that EM Heat warms your home faster. While it provides steady heat, the speed of warming depends on your system's capacity, not the mode.
Tips to Minimize Emergency Heat Usage
Here are some practical ways Atlanta families can reduce their reliance on EM Heat:
- Schedule Routine Maintenance: Regularly servicing your HVAC system ensures it operates efficiently.
- Replace Air Filters: Clean filters improve airflow and reduce strain on your heat pump.
- Improve Home Insulation: Seal gaps around windows and doors to keep warm air inside. This not only lowers energy use but also keeps your home consistently cozy.
How to Use the Emergency Heat Setting on Your Thermostat
If you need to activate emergency heat manually, follow these simple steps:
- Locate the "EM Heat" or "Aux Heat" setting on your thermostat.
- Switch your thermostat to the emergency heat mode.
- Monitor your system to ensure the backup heating source is working.
If you're unsure about how to use this setting or if your heating system isn't functioning as it should, call a professional to help.
Key Takeaways for Atlanta Homeowners
Emergency heat is a valuable feature for homes with heat pumps, but it should only be used when absolutely necessary. Whether it's an unusually cold night or a malfunctioning heat pump, EM Heat keeps your family warm when you need it most.
By maintaining your HVAC system and improving your home's insulation, you can minimize your reliance on EM Heat and save on energy costs.
Need Help with Your Heating System?
If your heat pump isn't working or you have questions about your thermostat settings, Bardi is here to help. Our friendly and knowledgeable technicians have been keeping Atlanta families comfortable for years. Contact us today to schedule service or learn more about optimizing your heating system for the chilly months ahead!
