Controllers and Sensors

*Notice to HVACR Licensees Pertaining to HB 1162 (2025)

Dear HVACR Licensee,

The Maryland General Assembly has enacted House Bill 1162 (Chapter 386, 2025), which introduces new requirements related to the sale and purchase of heating, ventilation, air–conditioning, and refrigeration (HVACR) equipment. This law takes effect on October 1, 2025.

Key Provisions:

Sales Restricted to Licensed Professionals: HVACR equipment may only be sold to an individual or a business who:

holds or employs a holder of a Master, Master Restricted, or Limited License issued by the State Board of Heating, Ventilation, Air–Conditioning, and Refrigeration Contractors, or employ an individual who holds one of these licenses;
operates a business that resells equipment to licensed HVACR professionals; or
falls under a statutory exemption set forth in Maryland Annotated Code, Business Regulation Article § 9A–103.

Penalties for Violations:

First violation: Civil penalty up to $1,000. Maryland Annotated Code, Business Regulation Article §§ 9A–501.1 and 9A-505.
Second or subsequent violations: Civil penalty up to $5,000. Id.

What This Means for Licensees:

Ensure your license is current and valid so that you can continue to purchase HVACR equipment without interruption.
Be prepared to confirm your license status when purchasing HVACR equipment.

This legislation takes effect on October 1, 2025.

For questions, please contact the State Board of Heating, Ventilation, Air–Conditioning, and Refrigeration Contractors at DLOPLHVACR-LABOR@maryland.gov.

Controllers and Sensors

OUTDOOR AIR CFM FLOW CONTROL KIT

Lennox, Refrigerant Detection System (RDS) Coil Sensor Kit, Downflow

C0SNSR12AE1 MOUNT KIT - SWITCH

LB-50930DA MD ACT KT

Lennox COSNSR31AE-1, Relative Humidity (RH) Sensor Kit

Building Controller for Lights Vent Hoods Exhaust Fans Sprinklers 24VAC +/- 25% 50/60Hz 2VA

Lennox C0MISC13AE1, NEMA 1 Hinged Enclosure, (H x W x D) 12 x 10 x 4 Inch

Lennox C0SNZN73AE2, Indoor Remote Temperature Sensor, With 10k Ohm Resistor

Return Air Duct Mount Zone Sensor (Non-Communicating) +/-0.36DEG F Accuracy

After-Hours Override Button Momentary Pushbutton Used for After-Hours Override

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Controllers and Sensors

OUTDOOR AIR CFM FLOW CONTROL KIT

Lennox, Refrigerant Detection System (RDS) Coil Sensor Kit, Downflow

C0SNSR12AE1 MOUNT KIT - SWITCH

LB-50930DA MD ACT KT

Lennox COSNSR31AE-1, Relative Humidity (RH) Sensor Kit

Building Controller for Lights Vent Hoods Exhaust Fans Sprinklers 24VAC +/- 25% 50/60Hz 2VA

Lennox C0MISC13AE1, NEMA 1 Hinged Enclosure, (H x W x D) 12 x 10 x 4 Inch

Lennox C0SNZN73AE2, Indoor Remote Temperature Sensor, With 10k Ohm Resistor

Return Air Duct Mount Zone Sensor (Non-Communicating) +/-0.36DEG F Accuracy

After-Hours Override Button Momentary Pushbutton Used for After-Hours Override

Would you like to create a proposal for a new lead?

Would you like to create a proposal for existing lead?

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