The purpose of a heat strip in an RV air conditioning system is to provide supplemental heating when the primary furnace is not in use or when extra warmth is needed without running the RV’s furnace. This guide explains how heat strips work, suitability for different RV setups, installation considerations, safety, maintenance, and practical alternatives. It covers common questions about RV air conditioner heat strips, the electrical demands, and how to maximize comfort on the road.
What Is A Heat Strip In An RV Air Conditioner
A heat strip, or electric heat strip, is a resistance heater embedded in the air handler of an RV’s air conditioning system. When energized, electrical current flows through the strip, converting electricity into heat. The conditioned air from the AC unit passes over the warm strip, delivering heated air into the RV. This solution is typically used as a supplemental or alternative heat source to a propane furnace, especially in milder weather or when fuel efficiency is a priority.
How It Works With The RV AC System
Heat strips are designed to work with the condensate drain and air distribution of typical rooftop or—in some setups—through-the-wall RV AC units. When the thermostat calls for heat, the AC control board can energize the heat strip while the compressor may be off or running at a reduced level. The result is a steady flow of warm air without the noise and exhaust associated with a propane furnace. For best results, the system should be sized to avoid overworking either the air conditioner or the heat strip, and to maintain a comfortable cabin temperature.
Compatibility And Installation Considerations
Proper compatibility is essential for safety and performance. Not all RV AC units are designed to accommodate a heat strip, and wiring harnesses or control boards may require modification. Before purchasing, verify:
- The RV’s electrical system can supply the required amperage (often 15–30 amps depending on the heat strip and coach wiring).
- The AC unit model supports 120-volt heating elements or has a dedicated heat strip option from the manufacturer.
- There is adequate clearance and airflow around the internal components to prevent overheating.
- Safety features, such as a high-limit switch, are in place to shut off the strip if temperatures rise too high.
Installation typically involves connecting the heat strip to the RV’s 120-volt electrical circuit, integrating with the thermostat or control board, and ensuring proper insulation. Professional installation is recommended for complex rigs or when additional wiring, circuits, or control modifications are required.
Electrical Requirements And Safety
Heat strips draw significant electrical current. A common 1500–3000-watt range translates to about 12–25 amps at 120 volts, depending on strip length and material. Always consult a qualified electrician or RV technician to confirm circuit capacity, wire gauge, and breaker protection. Safety concerns include the risk of electrical shock, overheating, and fire hazards if the strip is undersized, poorly installed, or left unattended. Use a dedicated circuit, proper fusing, and ensure fans or ventilation remain unobstructed to dissipate heat.
Performance, Efficiency, And Comfort
Heat strips provide quick warmth and silent operation, making them convenient for dry, cool evenings. However, their efficiency is typically lower than a propane furnace on a per-BTU basis because electricity costs can be higher than propane in some locations. A heat strip is most effective when outdoor temperatures are moderate and humidity is low, as it does not dehumidify as a gas furnace does. For many RV owners, heat strips are a practical option for shoulder season comfort or as a backup heat source during cold snaps.
Maintenance And Longevity
Maintenance is generally straightforward. Regularly inspect electrical connections for looseness or corrosion and replace damaged wiring promptly. Keep the area around the heat strip clean and free of dust or debris that could insulate and cause overheating. Periodic testing of the thermostat control and circuit protection ensures reliable operation. If a heat strip malfunctions, diagnostic steps include checking voltage at the strip, confirming control signals, and inspecting fuses or breakers. Do not attempt to operate a damaged heat strip.
Installation Options And Alternatives
For RV owners who prefer alternatives, consider these options:
- Integrated RV furnaces with dedicated ducting can provide robust heating while avoiding high electricity use.
- Portable electric heaters offer flexible heating but must be used with caution to prevent fire hazards or moisture buildup in tight spaces.
- Hydronic or vented systems provide efficient heating with different fuel sources, suitable for larger RVs or frequent coastal travels.
- Thermal curtains and insulation upgrades improve overall comfort and reduce heating demand, complementing any heating method.
When considering a heat strip, evaluate total cost of ownership, including installation, wiring upgrades, and ongoing electricity costs, against the comfort gains and fuel savings from not running a propane furnace.
Cost Considerations And Return On Investment
Initial costs include the heat strip unit, any control hardware, and professional installation if needed. Ongoing costs depend on electricity rates and how often the system is used. A typical heat strip can cost more per hour to run than propane in regions with high electricity rates, but it may be cheaper in areas where propane prices are volatile or during periods when quiet operation is desired. Perform a cost comparison based on local rates and typical usage to determine whether a heat strip offers a favorable return on investment for the specific RV and travel pattern.
Tips For Optimal Use
To maximize comfort and efficiency:
- Pair the heat strip with proper insulation and draft-proofing to minimize heat loss.
- Set the thermostat to moderate temperatures and use a programmable schedule to reduce runtime during unoccupied periods.
- Ensure adequate ventilation when heating to avoid condensation buildup inside the RV.
- Regularly inspect electrical components and keep the system within manufacturer specifications.
Common Questions
- Can I install a heat strip myself? Some models permit DIY installation, but many RVs require professional wiring and control integration for safety and warranty reasons.
- Will a heat strip damage my air conditioner? When properly sized and installed, it should not damage the unit, but improper wiring or overcurrent can pose risks.
- Is a heat strip suitable for extreme cold? In very cold climates, a heat strip alone may be insufficient; pairing with a furnace or auxiliary heat source is often necessary.
Conclusion And Next Steps
For RV owners seeking quiet, fuel-efficient heating, a heat strip can be a viable option when compatibility, electrical capacity, and safe installation are addressed. It complements other heating strategies and can improve comfort during shoulder seasons or milder winters. To move forward, consult the RV manufacturer’s guidelines, have a qualified technician assess electrical capacity, and compare total costs with alternative heating approaches to determine the best solution for the travel lifestyle.