BIS Certification for Fixed Immersion Heaters in India products are subject to mandatory BIS Compulsory Registration Scheme (CRS) requirements in India. Every manufacturer and importer must obtain a valid BIS CRS registration for each model before the product can be manufactured, imported, or sold in the Indian market. Non-compliance attracts penalties including product seizure, market withdrawal, and prosecution under the BIS Act 2016.
This guide covers the applicable Indian Standards, mandatory safety testing requirements, the step-by-step CRS registration process, documentary requirements, and the most critical compliance pitfalls for this product category in 2026.
📜 Applicable Indian Standards
The following Indian Standards apply to this product category under the BIS CRS framework:
- IS/IEC 60335-2-73 — Particular requirements for fixed immersion heaters
- IS 1198 — Tubular electric heating elements (Indian standard for immersion heater elements)
- IS/IEC 60335-1 — General requirements for safety of household and similar electrical appliances
- IS 13252 (Part 1) — Indian adaptation of IEC 60335-1
📌 Fixed immersion heaters are permanently installed in water tanks and must withstand continuous operation under varying water quality and temperature conditions. BIS testing focuses on dielectric strength of the heating element under wet conditions, thermal cut-out performance, and corrosion resistance of element materials.
🔬 Mandatory Safety Tests
BIS-approved laboratories evaluate the following key areas during safety testing for this product category:
Electrical Safety
Dielectric strength under wet conditions, insulation resistance, leakage current, and earth continuity through the installation flange.
Thermal Performance
Element surface temperature, thermostat accuracy, thermal cut-out actuation temperature, and dry-run fault behaviour.
Corrosion Resistance
Element sheath material corrosion resistance testing under relevant water chemistry conditions.
Mechanical
Flange torque endurance, element mounting integrity, and tank-wall seal performance under thermal cycling.
📋 Step-by-Step BIS CRS Registration Process
- Standard IdentificationConfirm the product maps to IS/IEC 60335-2-73 and IS 1198. Verify whether the heater is intended for open-vented or sealed pressure systems, as this affects the test scope.
- Appoint AIRForeign manufacturers must appoint an AIR in India before filing the BIS CRS application.
- Sample Testing at BIS-Approved LabSubmit representative heater elements and assemblies for testing. Fixed immersion heater testing typically takes 5-7 weeks.
- Online ApplicationSubmit Form VI, test reports for both IS/IEC 60335-2-73 and IS 1198, factory documents, photographs, and trademark certificate.
- Query ResolutionCommon BIS queries involve dry-run fault protection evidence, corrosion resistance data for the element sheath, and thermal cut-out calibration records.
- R-Number GrantBIS issues the R-number upon approval. Mark on the element, installation flange label, packaging, and installation manual.
- RenewalValid for 2 years. Changes to element material, watt density, or thermostat specification require re-testing.
📄 Documents Required
- Completed BIS Form VI and declaration of conformity
- Test report as per IS/IEC 60335-2-73 from BIS-approved laboratory
- Test report as per IS 1198 for the heating element
- Factory registration and address proof
- Trademark certificate or trademark application
- AIR appointment letter (for foreign manufacturers)
- Product photographs with compliance label placement
- Technical specification sheet (rated voltage, wattage, element length, flange size, temperature rating)
- Installation and maintenance manual in English and/or Hindi
☠ Common Rejection Reasons
Frequent rejection causes include dry-run fault conditions causing element failure before the thermal cut-out actuates, insulation resistance falling below permissible limits during the wet dielectric test, corrosion evidence on the element sheath during testing, and model number mismatches between the IS 1198 element test report and the IS/IEC 60335-2-73 assembly test report.
🏭 Special Considerations for Importers
Fixed immersion heaters are a foundational component of India's water heating infrastructure. Importers supplying elements for OEM installation in geysers or industrial water heaters must ensure BIS CRS compliance for every element model.
Fixed Immersion Heater BIS Certification Partner
Global Approbation manages BIS CRS registration for fixed immersion heaters — covering both IS/IEC 60335-2-73 and IS 1198 test requirements.
BIS CRS Services Talk to Our Team