Envirofan is one of the few ceiling fan brands with a genuinely unusual origin story. The company behind it — Northwest Environmental Systems, Inc., based in Oshkosh, Wisconsin — was originally founded in 1972 by Paul and Justine Fowler as Northwest Feed Research, an agricultural feed supply business. The company expanded into industrial and commercial environmental control systems, eventually pivoting toward ceiling fans as a core product. The Envirofan trade name for the ceiling fan division was formally adopted in 1995 following an acquisition, though fans carrying the Envirofan and Banvil names had been in the market well before that. Today Northwest Envirofan describes itself as North America’s leading manufacturer of industrial and commercial ceiling fan products — a niche claim that reflects what Envirofan actually is: a serious commercial and industrial brand that sold residential fans on the side during the 1980s, not a residential brand that happened to make commercial models.
The Banvil Connection
People who come across older Envirofan equipment in commercial buildings, barns, or warehouses sometimes encounter the Banvil name instead, and the two are directly related. Banvil was the original parent company name, and fans were sold under both the Banvil and Envirofan labels during the same period. The Banvil Gold Line motors from the mid-1980s are particularly well regarded among vintage ceiling fan enthusiasts for their solid industrial construction. Banvil 2000 of Canada continues to import fans separately from the US Northwest Envirofan operation. If you have a fan labeled Banvil rather than Envirofan, the history, construction philosophy, and repair approaches are the same — the name difference reflects the corporate history rather than a meaningful product distinction.
Commercial and Industrial Envirofan Models
The core of Northwest Envirofan’s current lineup is their commercial and industrial ceiling fan range, sold in 36-inch, 48-inch, and 56-inch blade spans with variable speed controls. These are working fans built for environments where residential equipment would fail — factories, warehouses, barns, equine facilities, dairy operations, and large commercial spaces. The commercial Silver Line models (the 48C-9 and 60F-9 series) carry a three-year warranty and are rated for standard 120V single-phase electrical service; the heavier-duty industrial models (the 160C-7 and 160F-7 series) carry a five-year warranty and are available in both 120V and 277V configurations for facilities on industrial electrical service. Airflow figures are substantially higher than residential fans — the commercial 56-inch 60F-9 moves up to 7,269 CFM at high speed, and the industrial 160F-7 in the same 56-inch span pushes up to 7,724 CFM. For context, a typical residential 52-inch fan moves somewhere in the range of 4,000–5,000 CFM at high speed, so these are genuinely different tools for different applications.
Northwest Envirofan also produces the Agrifan line, which is specifically built for severe service agricultural environments — poultry houses, hog confinement buildings, and other settings where ammonia, dust, and moisture levels would destroy standard commercial fans quickly. The Protecto-Guard ceiling fan guard line is a related product designed to cage Envirofan and other commercial fans in environments where employee safety requires guarding the blade arc. These aren’t residential products, but they round out the picture of what Envirofan actually is as a company: a specialized industrial supplier that happens to occupy a ceiling fan category entry in databases built primarily around residential brands.
The 1980s Residential Line: SMC, Evergo, and What You Might Have
During the 1980s residential ceiling fan boom, Envirofan and Banvil extended into the home market with a residential product line. These fans were manufactured by SMC and Evergo rather than by Northwest Environmental Systems directly — Envirofan acted as a distributor or brand licensee for residential product that these other manufacturers produced. SMC was a major OEM ceiling fan manufacturer of the era whose products were sold under numerous brand names, and Evergo was another manufacturer active in the same period. The residential Envirofan/Banvil fans from this era carry an industrial aesthetic — simpler motor housings, metal construction, a more utilitarian look than the decorative fans dominant in the consumer market — which reflects the company’s commercial roots even in its residential offerings.
One residential model in particular deserves specific mention: the Evergo-manufactured Envirofan that used a dual pull chain variable speed control system. Rather than the standard single pull chain that cycles through discrete speed settings, this model used two separate pull chains to control fan speed across a broader variable range. The mechanism was clever but fragile — it was vulnerable to breaking if the pull chains were yanked rather than pulled smoothly, which is how pull chains get operated in the real world. If you have one of these fans and the variable speed control is non-functional, this fragility of the dual chain mechanism is the most likely cause. Replacing the control assembly with a standard pull chain speed switch — sacrificing variable speed for the reliable three or four discrete speed settings common on other fans — is usually the practical repair, since replacement dual chain assemblies for this specific mechanism are not readily available through normal parts channels.
Common Problems and Maintenance for Envirofan Ceiling Fans
The commercial and industrial Envirofan models are built for simplicity and durability — the motor designs are straightforward, the construction is robust, and the failure modes are predictable. Bearing wear and dry lubrication are the primary maintenance issues over time, as they are for virtually all ceiling fans with decades of use. Oil ports on the motor housing allow lubrication without full disassembly on most models, and keeping bearings properly oiled is the single most effective maintenance step for extending the life of any older Envirofan. Use lightweight non-detergent machine oil — 10 to 20 weight — and avoid WD-40, which is not a long-term lubricant and will leave residue that attracts dust and accelerates wear.
Capacitor failure is the other common issue, particularly on older residential Envirofan models. The capacitor is responsible for creating the phase shift that allows the motor to start and maintain its correct operating speed across different speed settings. A failed capacitor typically manifests as a fan that hums but won’t start spinning from rest, starts slowly and runs at reduced speed, or won’t run on one or more speed settings even though others work. Capacitors are generic electrical components that can be matched and replaced by spec — the microfarad rating and voltage rating are printed on the capacitor body and are the numbers you need to source a replacement. This is a straightforward repair for anyone comfortable working with electrical components, and the part itself is inexpensive through electrical supply stores or ceiling fan parts suppliers.
The residential SMC and Evergo Envirofan models from the 1980s are subject to the same general repair needs as other imported residential fans from that era: capacitors, pull chain switches, and bearing lubrication account for the vast majority of issues. Pull chain switches are generic components available inexpensively; matching the number of speed positions to the original switch is the key specification. Blades for these fans can be sourced by matching the blade span, bracket hole spacing, and blade pitch, since OEM replacement blades for 1980s models are not available through any current channel.
Is Envirofan Still Active?
Yes — Northwest Envirofan continues to operate as an active commercial and industrial ceiling fan manufacturer and supplier out of Oshkosh, Wisconsin. Their commercial and industrial fan lineup is available through industrial distributors, and their website (envirofan.com) lists current products and provides distributor contact information. For residential Envirofan or Banvil fans from the 1980s, Northwest is not a useful support resource since those products were sourced from third-party manufacturers under a brand arrangement rather than built by Northwest. For current commercial Envirofan product support, Northwest Environmental Systems is the direct contact. For vintage residential models, ceiling fan enthusiast communities and the SMC and Evergo brand pages are better resources than the manufacturer itself.