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Understanding CAN CSA C804-18: Energy Performance Requirements for Dehumidifiers
A comprehensive guide to the Canadian standard for dehumidifier energy efficiency, test methods, and compliance
CAN CSA C804-18 establishes the minimum energy performance standards and test methods for electrically operated mechanical compression dehumidifiers in Canada. This standard is essential for manufacturers, regulators, and consumers seeking to reduce energy consumption and operational costs. It sets clear benchmarks for energy efficiency and provides a consistent methodology for evaluating dehumidifier performance. This article examines the scope, technical requirements, implementation highlights, and compliance notes associated with CAN CSA C804-18.
1. Scope and Application
CAN CSA C804-18 applies to portable and whole-house dehumidifiers that use a mechanical compression refrigeration cycle and have a water removal capacity of up to 56 litres per day (100 pints per day) under standard rating conditions. The standard covers products intended for residential and light commercial use, including those with integrated pumps or continuous drainage options.
The following types of dehumidifiers are excluded from the scope:
- Units that not use a vapour-compression cycle (e.g., desiccant or absorption-based dehumidifiers).
- Dehumidifiers integrated into HVAC systems or designed primarily for industrial applications.
- Portable air conditioners operating in dehumidification mode unless specified by the manufacturer.
Tip: Manufacturers should verify that their product’s capacity falls within the covered range before applying the standard. Models with capacities exceeding 56 L/day may be subject to alternative efficiency regulations.
2. Technical Requirements and Test Methods
2.1 Test Conditions
All measurements must be conducted in a controlled environmental chamber meeting the requirements of the standard. The standard rating conditions are 26.7 °C (80 °F) dry-bulb temperature and 60 % relative humidity. The dehumidifier is operated continuously for a specified period, and the water collected is weighed to determine capacity in litres per day.
2.2 Energy Factor Calculation
The key performance metric is the Energy Factor (EF), expressed in litres per kilowatt-hour (L/kWh). EF is calculated as:
EF = daily water removal (L/day) / daily energy consumption (kWh/day)
The standard specifies minimum EF values that depend on the dehumidifier’s capacity, as shown in Table 1.
| Capacity (L/day) | Minimum Energy Factor (L/kWh) |
|---|---|
| ≤ 20 | 1.90 |
| 20 to 35 | 2.10 |
| 35 to 56 | 2.50 |
Table 1: Minimum Energy Factor requirements for dehumidifiers under CAN CSA C804-18.
Important: The test procedure requires stabilization of the unit before measurements begin. Deviations from the prescribed test conditions can lead to inaccurate EF results and potential non-compliance.
2.3 Additional Requirements
Dehumidifiers must also comply with safety standards (e.g., CSA C22.2 No. 60335-2-40) and labelling requirements that include capacity, energy consumption, and EF rating. The standard also defines tolerances for capacity and power input.
3. Implementation Highlights
Effective implementation of CAN CSA C804-18 involves integrating the test protocol and efficiency criteria into the product development cycle. Key steps for manufacturers include:
- Design for Efficiency: Optimizing compressor selection, coil design, and airflow to meet or exceed the minimum EF thresholds.
- Certification: Having products tested by an accredited third-party laboratory per the standard and registering with the appropriate regulatory body (e.g., Natural Resources Canada).
- Labeling and Documentation: Including the verified EF and capacity data on the product nameplate and packaging, along with the ENERGY STAR® mark if applicable.
Compliance Benefit: Meeting the efficiency levels not only ensures market access across Canada but also qualifies products for energy efficiency incentive programs, which can enhance consumer appeal.
4. Compliance Notes
Compliance with CAN CSA C804-18 is mandatory for dehumidifiers sold in Canada. Regulatory authorities conduct periodic market surveillance and may request verification testing on units sampled from retail channels. Non‑compliant products can face removal from the market, fines, and loss of certification.
Key compliance considerations:
- Maintain documentation of test reports for each model, including any variant configurations.
- Monitor changes to the standard (CAN CSA C804-18 has been reaffirmed in 2024; future revisions may introduce stricter EF values).
- Coordinate with provincial regulations, which may set additional efficiency requirements.
Non-Compliance Risk: Selling unregistered or under‑performing dehumidifiers can result in enforcement actions including monetary penalties and prohibition of sales. Always verify EF ratings before market introduction.
Frequently Asked Questions
Q: What devices are covered by CAN CSA C804-18?
A: The standard applies to mechanical compression dehumidifiers with a water removal capacity of up to 56 L/day. It covers portable and whole‑house models for residential or light commercial use.
A: The standard applies to mechanical compression dehumidifiers with a water removal capacity of up to 56 L/day. It covers portable and whole‑house models for residential or light commercial use.
Q: How is the Energy Factor (EF) measured?
A: EF is determined under standardized chamber conditions (26.7 °C, 60 % RH) by dividing the total water collected per day by the total energy consumed per day. The result is expressed in litres per kilowatt‑hour (L/kWh).
A: EF is determined under standardized chamber conditions (26.7 °C, 60 % RH) by dividing the total water collected per day by the total energy consumed per day. The result is expressed in litres per kilowatt‑hour (L/kWh).
Q: Is third-party certification required?
A: While the standard does not explicitly mandate third‑party testing, demonstrating compliance typically requires test reports from an accredited laboratory. Many retailers and regulatory bodies rely on independent verification.
A: While the standard does not explicitly mandate third‑party testing, demonstrating compliance typically requires test reports from an accredited laboratory. Many retailers and regulatory bodies rely on independent verification.
Q: Are there different efficiency tiers?
A: CAN CSA C804-18 specifies a single minimum EF level per capacity range. Dehumidifiers that exceed these levels may qualify for voluntary programs such as ENERGY STAR Canada, which sets higher thresholds.
A: CAN CSA C804-18 specifies a single minimum EF level per capacity range. Dehumidifiers that exceed these levels may qualify for voluntary programs such as ENERGY STAR Canada, which sets higher thresholds.
Last updated: 2026