California Proposes New Greenhouse Energy Codes

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<![CDATA[The Codes and Standards Enhancement (CASE) Initiative suggested new energy code requirements and changes to existing requirements for projects regarding greenhouses and controlled environment horticulture in California, updating the original California Energy Code (Title 24, Part 6) submitted in October 2020.According to the proposal, the updated requirements will apply to projects regarding greenhouse building envelopes, greenhouse lighting, indoor controlled environment horticulture (CEH) lighting and indoor CEH dehumidification.It is essential for cannabis and non-cannabis growers, LED manufacturers, engineers, distributors, energy-efficient consultants, research groups, industry trade groups, as well as facility managers, engineers and developers to be aware of the suggested changes, the proposal states.The proposed code requirements are listed in the proposal as follows:Horticultural Lighting Minimum Efficacy (indoor CEH lighting): For indoor CEH operations, luminaires with removable lamps will be required to use lamps with a photosynthetic photon efficacy (PPE) of at least 1.9 micromoles per joule.Luminaires without removable lamps shall meet a minimum luminaire PPE of 1.9 micromoles per joule.This will allow the use of efficient double-ended HPS lamps; most LED luminaires will qualify. The minimum efficacy requirements only apply to CEH spaces with more than 40 kW of aggregate horticultural lighting load. This equates to approximately (36) 1000W HPS luminaires.Horticultural Lighting Minimum Efficacy (greenhouse lighting):For greenhouses, luminaires with removable lamps will be required to use lamps with a PPE of at least 1.7 micromoles per joule.Luminaires without removable lamps will also need to meet a minimum luminaire PPE of 1.7 micromoles per joule.The minimum efficacy requirements only apply to greenhouse lighting with more than 40 kW of aggregate horticultural lighting load.Greenhouse Envelope Efficiency:Greenhouses will now have clear, simplified language for the skylight and window requirements that can be met using building materials and construction methods that are commonly deployed in the market (a U-factor of 0.7 or less).This clarifies and…

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Source : California Proposes New Greenhouse Energy Codes

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