What Harnois Greenhouses does

Harnois Greenhouses is a Quebec-based, third-generation family-owned manufacturer of commercial greenhouse structures operating as a division of Industries Harnois. Founded in 1958, the company designs, manufactures, and installs four core product lines: TunnelPro Plus (polytunnels at approximately $2/sq ft), Ovaltech (freestanding), Luminosa (gutter-connected), and Vermax (Venlo glass greenhouses at $20-$50/sq ft). Its structures are built around a proprietary oval-tube steel framing technology developed over more than six decades, which supports structural performance claims for harsh-climate North American installations.

The company sells directly to enterprise growers across Canada, the United States, and Mexico, with a cumulative footprint of more than 10,000 installations spanning produce (Red Sun Farms, VegPro International, Good Year Farms), nursery (Van Belle Nursery), floriculture, and berry (PRT Growing Services) segments, as well as adjacent applications such as livestock operations. Revenue mechanics are project-based — individual glass greenhouse projects can range from roughly $1M to over $40M depending on square footage — and are supported by a partner installer network, trade show participation, and an after-sales service program with multi-year follow-ups. Approximately 60% of materials are sourced locally within Canada, reducing supply-chain and currency exposure.

Strategically, Harnois expanded into the premium glass greenhouse segment with the Vermax launch in 2022, integrated Hoogendoorn's IIVO AI optimization system for high-end customers, and entered a partnership with Dubois Agrinovation to bundle irrigation and crop management technologies. A Spanish-language website signals active commercial expansion into Mexico and Latin America. The business remains privately held with no external funding rounds disclosed; co-founder Rolland Harnois passed away on January 26, 2024, marking a leadership transition within the family ownership structure.

Name

Harnois Greenhouses

Legal name

Industries Harnois

Website

https://harnoisgreenhouse.com

Company type

Private

Founded year

1958

Operating status

Operating

Headcount range

11–50 employees

Short description

Harnois Greenhouses is a Quebec-based, family-owned manufacturer of commercial greenhouse structures — including polytunnels, freestanding, gutter-connected, and Venlo glass systems — serving produce, floriculture, nursery, and berry growers across North America through direct enterprise sales and turnkey installation services.

Ownership category

akta.pro rank

Product category

Commercial Greenhouse Structures

NAICS

Greenhouse, Nursery, and Floriculture Production (1114)

SIC

Agricultural Services (700)

akta.pro primary industry

Greenhouse Structures & Construction (Frames, Glazing, Benches) (AFAAAHAA)

akta.pro secondary industry

Controlled Environment Lighting (LED Grow Lights, Controls) (AFAAAHAC)

Keywords

• Commercial greenhouses
• Greenhouse manufacturing
• Controlled environment agriculture
• High tunnel structures
• Gutter-connected greenhouses

Headquarters

HQ city

St-Thomas

HQ country

Canada

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Commercial Greenhouse Structure Sales: Harnois designs, manufactures, and sells commercial greenhouse structures including field scale polytunnels, freestanding greenhouses, gutter-connected greenhouses, and Venlo glass greenhouses. Pricing varies by structure type, size, and complexity, ranging from approximately $2/sq.ft. for basic polytunnels to $20-50/sq.ft. or more for advanced glass greenhouse systems.
2. Greenhouse Equipment and Technologies: Sale of complementary equipment including ventilation systems, climate screens, irrigation systems, heating systems, lighting, benches, covering materials (poly film), and automation systems. Equipment includes Ridder climate screens and drive systems, Stolze irrigation systems, Hoogendoorn IIVO climate control, and Hoogendoorn dilution systems.
3. Installation Services: Professional on-site installation services delivered by specialized Harnois teams or trained partner installers, including permit and regulatory assistance, site evaluation, and technical planning.
4. After-Sales Service and Maintenance: Ongoing after-sales support including warranty service, preventive maintenance, spare parts supply, on-site interventions, system upgrades, and performance optimizations. Support extends beyond installation with structured follow-up at 1 month, 1 year, and 10+ years after purchase.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

Harnois Greenhouses designs, manufactures, and installs commercial greenhouse structures for professional growers across North America. The company offers four main structure types — the Vermax semi-closed Venlo glass greenhouse, the Luminosa gutter-connected greenhouse, the Ovaltech freestanding greenhouse, and the TunnelPro Plus field-scale polytunnel — alongside complementary equipment, installation services, and long-term after-sales maintenance.

Product overview

Harnois Greenhouses designs, manufactures, and installs a portfolio of four distinct commercial greenhouse structures complemented by proprietary structural technologies, equipment modules, and after-sales services. The core portfolio consists of: (1) the Vermax — a semi-closed Venlo glass greenhouse with patented energy, water, and CO₂ management for carbon-neutral production; (2) the Luminosa — a gutter-connected greenhouse with high light transmission and modular expandability; (3) the Ovaltech — a freestanding oval-tube greenhouse engineered for extreme snow and wind loads; and (4) the TunnelPro Plus — a field-scale polytunnel for season extension. Supporting these structures are proprietary technologies including the Oval Tube Framing System and PowerCoat finish, equipment modules such as ventilation systems, and a long-term after-sales service and maintenance program.

Differentiator

Problem solved

Functional benefit

Products and services

• Vermax Venlo Glass Greenhouse Harnois' most advanced greenhouse model — a semi-closed Venlo glass greenhouse engineered in Canada for carbon-neutral, high-efficiency commercial production. Incorporates patented solar, geothermal, and fuel cell technologies, an advanced heat storage system achieving COP up to 7.5, under-gutter heights of 6.5m to 8m, 97–98% light transmission glass, and fully circular water and CO2 management. Designed for year-round, large-scale commercial vegetable production.
• Luminosa Gutter-Connected Greenhouse A high-luminosity gutter-connected greenhouse system featuring Harnois' signature oval-tube framing and an engineered structural gutter. Bay spacings range from 21'4" to 36' with gutter heights from 12' to 20'. Offers high light transmission, modular expandability, and compatibility with full climate automation, irrigation, and LED lighting systems. Used for vegetables, berries, floriculture, and retail garden center applications.
• Ovaltech Freestanding Greenhouse Harnois' flagship freestanding greenhouse featuring patented oval-tube steel arches engineered for heavy snow loads (up to 127 psf / 622 kg/m²) and high wind resistance (up to 155 mph). Available in widths from 20' to 42' with a Gothic peak design that maximizes light transmission and condensation control. Suitable for year-round vegetable, berry, and ornamental production, and approved under the NRCS High Tunnel Initiative.
• TunnelPro Plus Field-Scale Polytunnel A field-scale polytunnel (high tunnel) built for berry growers and open-field farmers transitioning to protected cultivation. At 31'6" wide with screw-pile foundations requiring no concrete, it offers fast deployment at an entry-level cost of approximately $2/sq. ft. Extends the growing season by up to three months, dramatically reduces botrytis pressure, and features UV-resistant film with optional anti-drip treatment.
• After-Sales Service & Maintenance Program Long-term support program covering warranty repairs, preventive maintenance planning, spare parts supply, system upgrades, on-site interventions by certified technicians, and structured follow-up at 1 month, 1 year, and 10+ years after purchase. Includes remote troubleshooting and deployment of certified technicians to minimize production downtime.

Quantifiable outcome

• 28% stronger than round tubing, 46% stronger than square tubing for the same steel quantity
• +8 more outcomes

Named customers8 records

Segments7 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability1 record

Feature5 records

Partnerships

One partnership is on record.

• Dubois AgrinovationcoreStrategic or Co-development PartnerHarnois works closely with Dubois Agrinovation, a trusted agricultural supplier known for irrigation and crop management tools. Through this collaboration, growers benefit from integrated drip irrigation systems, shade and insect netting options, ground covers and mulch films, and local expertise and logistics. This partnership allows growers to streamline their procurement process and maximize productivity.

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Nexus Greenhouse Systems (Rough Brothers): US commercial greenhouse builder (formerly Rough Brothers) with national reach across gutter-connected, freestanding, and research-grade structures. Competes with Harnois across North America on multi-acre enterprise projects.
• Kubo Group: Dutch turnkey greenhouse builder offering polytunnels, Venlo glass, and high-tech semi-closed greenhouses across Europe, North America, and beyond. Directly comparable to Harnois on product portfolio, full-service engineering/installation model, and target customer segment of commercial growers.
• Van der Hoeven Horticultural Projects: Dutch turnkey supplier of high-tech semi-closed glass greenhouses for international food and floriculture markets. Overlaps directly with Harnois' Vermax positioning on engineering, climate management, and global project delivery.
• Richel Group: French manufacturer of plastic and glass commercial greenhouses with deep European heritage. Competes with Harnois in gutter-connected poly and Venlo glass structures for vegetable and soft-fruit production across international markets.
• Stuppy Greenhouse: North American manufacturer of commercial greenhouses, including gutter-connected and freestanding structures, with comparable product breadth and direct competition in the US Midwest and produce/floriculture segments.
• BOAL Group: Specialist in aluminum greenhouse roof and facade systems, providing Venlo-style glass covering structures globally. Adjacent direct competitor in glass greenhouse frame engineering serving large commercial projects.
• Certhon: Dutch high-tech greenhouse builder specializing in semi-closed Venlo glass, horticultural lighting, and integrated automation. Direct peer in the premium glass segment where Harnois competes with Vermax for large international vegetable and floriculture projects.
• Atlas Manufacturing: North American manufacturer of greenhouses, benches, and environmental control equipment for horticulture and research. Comparable product breadth and shared focus on Canadian and US commercial growers.
• Conley's Greenhouse Mfg. & Sales: US-based commercial greenhouse and cold-frame manufacturer serving North American growers with gutter-connected structures, ventilation, and heating systems. Direct competitor to Harnois in the US produce and nursery segment.

Emerging players

• CropKing Inc. US-based manufacturer focused on hydroponic and controlled environment greenhouse systems, particularly for vegetable production and high-tunnel growers. Smaller scale than Harnois but overlaps in hydroponics, NFT systems, and protected cultivation equipment sales.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@SerresHarnoisGreenhouses
• Facebookfacebook.com/SerresHarnoisGreenhouses
• LinkedInlinkedin.com/showcase/serres-harnois-greenhouse
• Instagraminstagram.com/harnois.ghs
• Pinterestca.pinterest.com/harnois_ghs

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Harnois Greenhouses