what is heat strip

3 min read 25-12-2024

A heat strip is a supplemental electric heating element often found in heat pumps and air handlers. It provides extra warmth during extremely cold weather when the heat pump alone can't keep up. Understanding how heat strips work and when they're used can help you better manage your home's heating system and energy costs.

How Does a Heat Strip Work?

Heat strips are essentially electric resistance heaters. They work by passing an electric current through a resistive element, generating heat. This heat is then distributed through your home's ductwork, just like the air warmed by your heat pump. Unlike a heat pump, which transfers heat from the outside air, a heat strip generates heat directly.

Simple Operation: Electricity to Heat

The process is straightforward: electricity flows through the resistive element, the element heats up, and the heat is blown into your home via the air handler or furnace blower. This is a purely resistive heating process, unlike the heat pump's more complex heat exchange.

When Do Heat Strips Turn On?

Heat strips activate automatically when the outdoor temperature drops below a certain point. This threshold varies depending on the specific system's programming and the heat pump's capabilities. Essentially, the system monitors the outside temperature and compares it to the desired indoor temperature. If the heat pump alone can't reach the desired indoor temperature, the heat strips kick in to provide additional heating power.

Understanding the Temperature Threshold

This is crucial for energy efficiency. The heat pump is far more energy-efficient than the heat strip. The system tries to use the heat pump as much as possible before resorting to electric heat.

Heat Strips vs. Heat Pumps: Efficiency Comparison

Heat pumps are generally much more energy-efficient than heat strips. Heat pumps move heat; heat strips create it directly by converting electricity to heat. This conversion is less efficient.

Efficiency Differences Explained

While heat pumps are superior in mild and moderate temperatures, heat strips provide supplemental heat for extreme cold when the heat pump's efficiency drops significantly. Think of them as a backup system for peak cold snaps.

Heat Strip Maintenance and Troubleshooting

While heat strips are relatively simple, basic maintenance can extend their lifespan and prevent issues. This includes regular inspection for dust buildup and proper airflow around the unit.

Regular Maintenance Tips

Dust Removal: Keep the area around the heat strips clean and free of dust. Dust buildup can restrict airflow and reduce efficiency.
Airflow: Ensure nothing obstructs the airflow around the unit.
Professional Inspections: Schedule annual inspections by a qualified HVAC technician for overall system maintenance.

Common Heat Strip Problems and Solutions

One common problem is the heat strip not turning on when needed. This might indicate a faulty thermostat, wiring issue, or a problem with the heat strip itself. Always consult a qualified HVAC technician to diagnose and resolve electrical issues.

Troubleshooting Steps

Check the Thermostat: Ensure the thermostat is set correctly and functioning properly.
Circuit Breaker: Check your home's circuit breaker to make sure power is not interrupted to the heating system.
Professional Assistance: For more complex problems, contact an HVAC professional.

Choosing the Right System: Heat Pump with Heat Strip

When selecting a new heating system, understanding the role of a heat strip is vital. It's a crucial component of many efficient heat pump systems. While it's less efficient than the heat pump itself, it ensures reliable heating even in the coldest conditions.

Important Considerations

Climate: Consider your local climate and how frequently extremely low temperatures are experienced. This will influence the importance of having a heat strip in your system.
Energy Costs: Balance the cost of a system with heat strips against its enhanced heating capacity during extreme cold.

In conclusion, a heat strip is a vital component of many modern heating systems, providing backup heating power for your heat pump during extreme cold weather. Understanding how it works and its role in maintaining a comfortable home temperature can help you make informed decisions about your home's heating system. Remember to prioritize regular maintenance to ensure efficient and reliable operation.