HEIMAN C1-R | ETL-Certified RF 915 MHz Interlinked Carbon Monoxide Detector

2026-04-27

Model: C1-R | Brand: heiman | Certification: ETL Listed to UL 2034 (CO safety), Interconnection Aligned to UL 217 (10th Ed.) networking Protocols | Protocol: RF 915 MHz ISM Band | Application: Whole-Building Life-Safety CO Monitoring

Core Communication & IoT Advantages

The HEIMAN C1-R is engineered as a dedicated Wireless Interconnected Carbon Monoxide Detector operating on the 915 MHz ISM band, a frequency specifically selected for deterministic, interference-resistant life-safety signaling across residential and multi-unit structures. Unlike Wi-Fi or Bluetooth-dependent sensors, the C1-R operates independently of internet connectivity, ensuring uninterrupted alarm propagation during power outages, router failures, or cellular blackouts.

Hub-Free RF Interconnection: Leverages a peer-to-peer 915 MHz radio protocol with Frequency Hopping Spread Spectrum (FHSS). Up to 40 HEIMAN RF-compatible life-safety devices (smoke, CO, or combo units) can be synchronized into a single alarm group, delivering whole-building audible alerts with <2 seconds latency.
Whole-Building Coverage & Structural Penetration: 915 MHz RF signals naturally penetrate drywall, timber framing, and light masonry more effectively than 2.4 GHz bands. This ensures reliable alarm propagation between floors, basements, and separated wings without signal repeaters.
Source-Tracking Location Identification: Each C1-R broadcasts a cryptographically unique RF ID during activation. When integrated with the HEIMAN Smart App or a compatible RF gateway, building managers or emergency responders receive precise, unit-level location alerts (e.g., "co alarm: Unit C1-R-03 | Basement Furnace Room"), drastically reducing response times.
Network Resilience & Zero Cloud Dependency: Core interlinking, horn activation, and RF synchronization operate entirely on local RF mesh logic. Battery-backed transceivers maintain network heartbeat for 24+ months, with automatic low-battery reporting, tamper detection, and seamless re-pairing upon unit replacement.

Core Features & Authoritative Technical Validation

The C1-R utilizes a high-precision electrochemical sensor array paired with a compliance-driven alarm threshold architecture, rigorously validated under the latest carbon monoxide safety standards.

UL 2034 & UL 217 (10th Ed.) Interconnection Compliance:
- CO detection is independently certified to UL 2034 (Single- and Multiple-Station co alarms), which governs sensor accuracy, environmental compensation, and mandatory alarm time-to-trigger curves.
- Per UL 2034, Sections 28–30 (Performance & Alarm Thresholds), the C1-R triggers within certified timeframes: 70 PPM (60–240 min), 150 PPM (10–50 min), and 400 PPM (4–15 min).
- The device's RF interlinking architecture complies with UL 217 (10th Ed.) Section 54 (Interconnection Requirements), ensuring synchronized alarm behavior across mixed life-safety networks.
Electrochemical Sensing & Background CO Filtering: The solid-state electrochemical cell is calibrated to distinguish between dangerous CO accumulation and normal ambient traces (<4 PPM) from urban air or temporary ventilation backdrafts. temperature and humidity compensation algorithms prevent drift, ensuring long-term accuracy without frequent recalibration.
Life-Safety First Design: CO is colorless, odorless, and rapidly incapacitating. The C1-R prioritizes sub-60-second audible/visual warning onset, paired with a continuous 85+ dB temporal-3 horn pattern that penetrates sleep cycles, aligning with CPSC and NFPA life-safety recommendations.
Self-Diagnostic & Supervision Protocols: Continuous sensor health monitoring, RF link verification, and tamper supervision ensure operational readiness. All fault states (end-of-life, sensor fault, low battery, RF dropout) are logged with timestamped clarity and broadcast to the network.

Technical Specifications

Application Scenarios & Installation Guidelines

The C1-R is purpose-designed for whole-building carbon monoxide protection where early detection, multi-unit synchronization, and precise location reporting are critical for occupant survival.

Ideal Deployment Environments:

Single-family homes with attached garages, gas furnaces, or fireplaces
Multi-family residential buildings, townhouses, & basement-level units
Short-term rentals, boutique hotels, & senior living communities
Properties with fuel-burning appliances, generators, or proximity to heavy traffic

Installation & Grouping Best Practices (NFPA 720 & UL 2034 Aligned):

Placement Strategy: Install outside each sleeping area and on every level of the home (including basements). Maintain ≥15 ft from fuel-burning appliances to prevent localized saturation that may cause nuisance alerts. Avoid dead-air corners, direct HVAC exhaust paths, and high-humidity zones.
RF Network Pairing:

Host device-Press reset button with pin 3 times then long press within 2 seconds.

Sub device-Press reset button with pin 2 times then long press within 2 seconds.

When it paired sucess,there will a beep in both device.

Interference Mitigation: Maintain ≥3 ft from large metal appliances, routers, or high-power RF emitters. 915 MHz naturally avoids Wi-Fi/zigbee congestion zones.
Testing & Commissioning: Use the built-in test button to verify electrochemical response, horn output, and RF interlink propagation. Confirm all grouped units trigger simultaneously and location alerts display correctly in the app or gateway panel.
Maintenance Schedule: Test monthly. Vacuum exterior vents bi-annually to prevent dust accumulation. Replace batteries upon low-battery alert or every 5–7 years. Replace entire unit at end-of-life indicator (typically 7 years per electrochemical cell degradation curve).

Frequently Asked Questions (FAQ)

Q1: Why does the C1-R use 915 MHz RF instead of Wi-Fi or Zigbee?
RF 915 MHz is a dedicated ISM band optimized for life-safety signaling. It operates independently of home networks, provides superior wall/floor penetration, and delivers deterministic alarm propagation. This ensures CO alerts are broadcast even during internet outages or smart hub failures.

Q2: What are the exact CO alarm thresholds, and how do they align with safety standards?
The C1-R complies with UL 2034 Sections 28–30. It triggers at: 70 PPM within 60–240 min, 150 PPM within 10–50 min, and 400 PPM within 4–15 min. These curves are scientifically calibrated to protect against both acute exposure and prolonged low-level buildup, matching CPSC and NFPA 720 guidelines.

Q3: How does the location-specific alarm feature work during a CO event?
Each C1-R unit contains private information code. When triggered, it broadcasts this across the synchronized network. Compatible controllers or the HEIMAN App instantly map the signal to a pre-assigned room/location, displaying precise origin data for emergency responders or property managers.

Q4: Can I interconnect the C1-R with Heiman smoke detectors in the same group?
Yes. HEIMAN’s 915 MHz ecosystem supports mixed life-safety networking. When paired, a CO alarm triggers only CO-specific alerts, a smoke alarm triggers fire-specific alerts, and both propagate synchronized audible warnings across all linked units for maximum occupant awareness.

Q5: Does the C1-R detect natural gas, propane, or other combustible gases?
No. The electrochemical sensor is specifically tuned for carbon monoxide (CO). For methane/propane detection, deploy a dedicated combustible gas detector. CO and combustible gas require different sensing technologies and calibration curves for life-safety accuracy.

Brand Endorsement

HEIMAN has been a trusted global manufacturer of smart environmental sensors and IoT life-safety systems for over 20 years. Operating R&D, environmental testing, and RF compliance facilities across North America, Europe, and Asia, HEIMAN engineers products that bridge residential accessibility with commercial-grade reliability.

Compliance-First Engineering: All life-safety devices undergo NRTL-certified testing (Intertek ETL, UL, TÜV), FCC/CE RF validation, and long-term environmental stress analysis before market release.
Scalable IoT Architecture: HEIMAN’s RF and Wi-Fi ecosystems are designed for property management dashboards, third-party automation platforms (Tuya, Smart Life, matter-ready bridges), and municipal safety integrations.
Quality & Traceability: Manufacturing follows ISO 9001:2015 and ISO 14001:2015. Every production batch maintains full certification logging, RF calibration records, electrochemical sensor aging curves, and 36-month post-sale technical support.