LED lighting isn't the only equipment that can qualify for a utility rebate. Non-lighting upgrades, such as HVAC systems, dehumidifiers, and environmental controls, can also qualify for an incentive, and in some programs that incentive can cover up to 70 percent of a project's incremental cost, according to Seattle City Light's indoor horticulture program materials. Which categories qualify, and how much they pay, varies widely by state and utility, so growers who stop at the lighting rebate are leaving other money on the table.
What Non-Lighting Equipment Typically Qualifies?
Utility and state rebate programs for cannabis and other controlled environment agriculture (CEA) operations commonly cover stand-alone dehumidifiers, high-efficiency HVAC equipment, variable frequency drives, or VFDs (devices that adjust a fan or pump motor's speed to match actual load), environmental and irrigation controllers, and building envelope upgrades. Which categories qualify, and how much they pay, varies by utility and state.
A quick reference for what typically shows up on a qualifying-equipment list:
- Stand-alone or integrated dehumidifiers
- High-efficiency HVAC and rooftop units
- Variable frequency drives (VFDs) on fans and pumps
- Environmental and irrigation controllers
- Building envelope upgrades, such as insulation and air sealing
Which of these a given program covers, and how much it pays, still depends entirely on the utility, the state, and the project.
Some programs group these measures as prescriptive, meaning a fixed incentive for a qualifying model number on a published list. Others require a custom application reviewed case by case, based on the energy savings a licensed engineer or the program's own technical team calculates for that specific facility. The two paths work differently enough that it helps to see them side by side:
- Prescriptive: a fixed, per-unit incentive for equipment already on a qualifying list; faster to apply for and approve; most common for dehumidifiers and lighting.
- Custom: an incentive calculated case by case from a facility's projected or measured energy savings; slower to approve and often preceded by a paid technical study; most common for HVAC retrofits and complex control systems.
Energy Trust of Oregon runs both tracks at once: dehumidifiers and lighting sit on its standard prescriptive list for indoor grows, while HVAC moves through a custom process that starts with a paid technical study, according to Energy Trust of Oregon's cannabis and hemp program page. A grower upgrading several equipment categories in one project may end up filing both a prescriptive and a custom application with the same utility.
How Do Dehumidifier Incentives Work?
Dehumidification can be a significant energy expense in indoor cultivation, and several state and utility programs offer incentives for qualifying dehumidifiers. Some evaluate dehumidifiers as a stand-alone prescriptive measure, while others fold a dehumidifier into a larger HVAC or energy-efficiency project reviewed as one application.
Eligibility depends on the program's equipment requirements, efficiency criteria, and application process. Before purchasing a unit, confirm whether your utility has a qualifying-product list, what documentation it requires, and whether approval is needed before the purchase or installation.
For facilities with central HVAC systems, integrated dehumidification may also be worth evaluating as part of a broader efficiency project.
Can HVAC Upgrades Qualify for Rebates?
Yes, though HVAC incentives are usually structured differently than lighting or dehumidification rebates. Seattle City Light offers instant, point-of-sale discounts on energy-efficient HVAC equipment and controls through its midstream HVAC+ program, and separately can cover up to 70 percent of incremental project costs on qualifying retrofit and new-construction projects, according to Seattle City Light's indoor horticulture program materials.
Energy Trust of Oregon takes a different approach: HVAC projects move through a paid technical study rather than a fixed per-unit incentive, and Energy Trust covers 100 percent of that study's cost before any equipment is installed. The Cloud Cover Cannabis project is a documented example of where that process can land. Its rooftop units used variable frequency drive fans and hot-gas reheat dehumidification instead of separate standalone dehumidifiers, paired with direct digital controls for temperature, humidity, and carbon dioxide, and the combined system earned a $124,100 incentive on the $594,000 project, according to Energy Trust of Oregon (2018).
What About Climate Controls and VFDs?
Environmental controllers, irrigation controllers, and VFDs on fans and pumps qualify in some prescriptive and custom programs, often as an add-on to a larger lighting or HVAC project rather than a stand-alone application. Energy Trust of Oregon lists greenhouse controllers and pump VFDs under its standard prescriptive incentives, according to Energy Trust of Oregon's cannabis and hemp program page.
Indoor climate controls more often move through the custom or technical-study pathway instead, since a program typically wants to see documented energy savings from the specific controller setup rather than approve it off a generic published list. Expect that application to take longer than a prescriptive one, and to ask for more detail about how the controller integrates with existing HVAC and dehumidification equipment.
How Do These Programs Vary by State?
Non-lighting rebate programs differ widely in scope and structure from state to state. Oregon, Washington, Vermont, Maine, and Colorado each run cannabis-specific or agricultural efficiency programs covering some combination of HVAC, dehumidification, and controls, but eligible equipment, incentive structure, and program status change from program to program and year to year.
- Oregon: Energy Trust of Oregon runs dehumidifiers and lighting as prescriptive measures, with HVAC funded through a custom, technical-study pathway, according to Energy Trust of Oregon's cannabis and hemp program page.
- Washington: Seattle City Light offers instant, point-of-sale discounts on qualifying HVAC equipment through its midstream HVAC+ program, and separately can cover up to 70 percent of incremental costs on larger retrofit projects, according to Seattle City Light's indoor horticulture program materials.
- Vermont: Efficiency Vermont offers incentives on stand-alone dehumidifiers for cannabis cultivators and can help growers identify efficient models before purchase, according to Efficiency Vermont.
- Maine: Efficiency Maine's agricultural solutions program covers dehumidifiers for indoor cannabis cultivation and lists HVAC as a separate incentive category, with eligibility tied to working through an Efficiency Maine Qualified Partner, according to Efficiency Maine.
- Colorado: The Colorado Energy Office's Cannabis Resource Optimization Program (CROP) has funded LED, HVAC, dehumidification, and building envelope upgrades specifically for cannabis cultivators, according to the Colorado Energy Office. Application rounds are listed as closed on the agency's program page as of 2026, so confirm availability directly with the agency before planning a project around it.
Before you sign a purchase order for any of this equipment, confirm your utility's pre-approval requirement first, in writing if the program allows it. The pre-approval rule that applies to LED retrofits applies here too: most programs require an application, and sometimes a site visit or technical study, before you buy. Purchasing dehumidifiers, HVAC units, or controls ahead of approval can disqualify the entire project from that utility's rebate, not just the equipment you bought early. If you are not sure which of your utility's programs covers a specific piece of equipment, What Rebates will check it for you at https://www.whatrebates.com/contact before you commit to a purchase order.
Questions Growers Actually Ask
Q: Do dehumidifiers really qualify for utility rebates?
A: Yes. Several utilities, including Efficiency Vermont and Efficiency Maine, offer incentives on stand-alone dehumidifiers for cannabis cultivation, typically based on the unit's efficiency rating or model listing. Confirm your specific program's qualifying model list and requirements before purchasing, since criteria and payouts vary by program and are never guaranteed in advance.
Q: Is HVAC rebate money harder to get than lighting rebate money?
A: Often, yes. Many HVAC rebates run through custom or technical-study pathways instead of a fixed per-unit amount, which means more paperwork and a longer review window. Some utilities simplify this: Seattle City Light offers instant point-of-sale discounts on qualifying HVAC equipment through its midstream HVAC+ program instead of a custom application.
Q: Can I get a rebate for environmental or irrigation controllers?
A: Sometimes. Controllers appear on some programs' standard prescriptive lists, particularly for greenhouses, while other programs only fund them through a custom application tied to documented energy savings. Ask your utility or state program directly which pathway covers controllers at your facility type before you budget for the upgrade.
Q: Do non-lighting rebate programs exist outside Oregon and Washington?
A: Yes. Efficiency Vermont and Efficiency Maine both offer dehumidifier incentives for cannabis cultivators, and the Colorado Energy Office's Cannabis Resource Optimization Program has funded HVAC, dehumidification, and envelope upgrades specifically for cannabis facilities. Program status and funding availability change, so confirm directly with each agency before applying.
Q: Do I need pre-approval before buying non-lighting equipment too?
A: Yes. The pre-approval requirement applies across equipment categories, not only lighting. Programs typically require an application, and often a site visit or technical study, before you purchase dehumidifiers, HVAC systems, or controls. Buying first can make the entire project ineligible for that program's rebate, regardless of how efficient the equipment is.
Sources:
- Energy Trust of Oregon, Cloud Cover Cannabis case study, 2018 — https://www.energytrust.org/wp-content/uploads/2018/09/Cloud-Cover-Cannabis_CS_1809.pdf
- Energy Trust of Oregon, cannabis and hemp program page — https://energytrust.org/fact-sheets/cannabis-and-hemp-fact-sheet
- Efficiency Vermont, cannabis cultivation energy savings — https://www.efficiencyvermont.com/blog/our-insights/ask-the-expert-can-efficiency-help-me-save-in-my-cannabis-growing-operation
- Seattle City Light, indoor horticulture program materials — https://seattle.gov/documents/Departments/CityLight/Business/IndoorHorticultureFacts.pdf
- Efficiency Maine, agricultural solutions — https://www.efficiencymaine.com/at-work/agricultural-solutions/
- Colorado Energy Office, Cannabis Resource Optimization Program (CROP) — https://energyoffice.colorado.gov/clean-energy-programs/clean-energy-grants/cannabis-resource-optimization-program-crop/colorado