The RV air conditioner heat strip is a compact electric heater that integrates with many RV rooftop air conditioning units to provide supplemental or primary heating. It offers a reliable option for warming an RV interior when outside temperatures drop or when the generator or shore power is limited. This article explains what a heat strip is, how it works, sizing considerations, installation tips, safety, and maintenance to help owners choose and use this heating option effectively.
What Is A Heat Strip In An RV AC System
A heat strip, also known as a heating element or electric strip, is a low-profile electric heater installed inside an RV roof air conditioner or its blower housing. It uses resistive heating elements to convert electrical energy into heat, circulating warm air through the unit and into the RV. Heat strips are designed to operate with the existing AC ductwork and thermostat, allowing users to switch from cooling to heating with minimal changes to the control system.
How A Heat Strip Works In An RV AC
When the thermostat calls for heat, the heat strip activates and heats the air that passes over the strip. The blower in the air conditioner then distributes this warmed air through the RV’s vents. Depending on the model, heat strips can provide steady, moderate warmth suitable for overnight temps or chilly mornings. They are generally most effective when powered by a steady electrical supply, such as shore power or a generator with sufficient amperage.
Benefits And Limitations
- Quiet, compact heating: Heat strips add warmth without loud gas furnaces or bulky heaters, keeping the living space comfortable.
- Integrated control: Many systems allow heating to be controlled from the same thermostat used for cooling, simplifying operation.
- Energy considerations: Heat strips use significant electricity; expect higher power draw than propane heaters and plan electrical capacity accordingly.
- Heat output variability: Performance depends on outside temperatures, RV insulation, and air conditioner efficiency. They are best for mild to moderate cold, not extreme winter heating.
- Compatibility: Not all RV AC units include a heat strip option; some require aftermarket installation or a different HVAC configuration.
Sizing, Compatibility, And Sourcing
Correct sizing ensures efficient heating and avoids overloading circuits. A typical 5,000 to 15,000 BTU rooftop AC unit may support a heat strip accessory, but capacity varies by model. Check the manufacturer’s specifications for maximum amperage, voltage (usually 120V), and the number of watts the strip consumes. When selecting a heat strip, confirm:
- Voltage compatibility with shore power or generator output
- Amperage requirements and total RV electrical load
- Thermostat compatibility and control wiring
- Physical fit within the air conditioner housing or retrofit options
For sourcing, consider OEM heat strips designed for your unit or reputable aftermarket kits with proper warranty coverage. Installation should follow the manufacturer’s instructions or be performed by a qualified RV technician to maintain safety and warranty validity.
Installation Tips
- Professional assessment: Have an RV technician verify electrical capacity and compatibility before purchase.
- Electrical capacity: Ensure the RV electrical system can handle the heat strip’s amperage without tripping breakers.
- Thermostat integration: Use the built-in thermostat control if available; otherwise, install a compatible thermostat relay or controller as directed.
- Sealing and insulation: Seal any penetrations and improve insulation to maximize efficiency and prevent heat loss.
- Vent placement: Ensure proper airflow from the air conditioner ducting to avoid hot spots and uneven heating.
Safety Considerations
- Electrical safety: Use appropriately rated wiring, fuses, and outlets; avoid daisy-chaining devices that exceed circuit limits.
- Overheating risks: Do not block the heat strip or restrict airflow; maintain clear clearance around the unit.
- Moisture and humidity: Running electric heat in damp environments requires proper insulation and moisture control to prevent mold.
- Fire prevention: Regularly inspect connections, look for scorch marks, and address any burning smells promptly.
Operating Tips For Efficient Use
- Plan electrical usage: Run the heat strip when connected to shore power or a capable generator to avoid depleting battery capacity.
- Thermostat settings: Set the thermostat to maintain a comfortable, consistent temperature rather than continuous high heat.
- Combine with insulation: Pair heat strip use with upgraded sealing, skirts, reflectix, and insulated window coverings for better efficiency.
- Heating strategy: Use the heat strip to take the edge off cold temps or to supplement a primary heating source in milder climates.
Maintenance And Longevity
Regular maintenance helps extend the life of a heat strip and ensure reliable performance. Inspect electrical connections for signs of wear or corrosion, verify proper airflow, and clean dust from the air conditioner housing and filters. Schedule periodic professional checks to assess electrical integrity, thermostat operation, and overall system health. If the unit exhibits reduced heating, unusual noises, or tripping breakers, stop use and consult a professional.