Modine’s Effinity93 Unit Heaters

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Modine's Effinity93 Unit Heaters

Modine has introduced the Effinity93, the most efficient gas-fired unit heater in North America. With six models available–from 135,000 to 310,000 BTU/hr–all operating at 93 percent efficiency, this condensing unit heater line delivers substantial energy savings to greenhouse owners. And, thanks to your feedback, Modine will be introducing two smaller sizes later this year.

Greenhouses that use unit heaters as their primary source of heating are only getting 78 percent seasonal efficiency from power-vented units, or worse, only 65 percent efficiency from old gravity-vented units. Every Effinity93 unit provides 93 percent efficiency, giving greenhouse owners a way to pocket some extra green for themselves, while significantly reducing what is typically their second largest annual expense–energy. In many North American locations, a single Effinity93 can save at least $1,000 in energy costs, and when you consider the number of heaters needed in every greenhouse, it’s easy to envision the positive impact this can have on your bottom line.

But that’s not all you get with the Effinity93. Each unit features Modine’s Conservicore technology, a stainless steel secondary heat exchanger specifically designed to withstand acidic condensate, offering greater durability than aluminum heat exchangers.

To keep corrosive chemicals outside of the combustion chamber, separated combustion is a must-have feature for greenhouse heaters today, and one that’s standard on the Effinity93. This process allows clean air to be drawn into the combustion chamber from outside the greenhouse in lieu of chemically-treated, humid air from inside the greenhouse, adding years onto your investment.

The Effinity93 is also a champion of the environment. Every heater produces 16 percent less CO2 than power-vented heaters and 32 percent less than gravity-vented heaters. To give this some perspective, replacing a 78 percent efficient heater for an Effinity93 in many areas nets the same positive environmental impact as planting more than 100 trees.

Every unit includes Modine’s exclusive Contractor Convenience Package, allowing for easier connectivity and troubleshooting. The standard package includes a service outlet, operational status lights which indicate power to the unit, a call-for-heat and gas valve operation, a junction box for connections and external terminals for fast thermostat connections.

If you would like to receive a customized heat savings payback calculation for your location or want more information on Modine’s greenhouse heating products, visit

Ray Schaffart is marketing and communications manager at Modine Manufacturing Co. He can be reached at 262-636-1504 or

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