“A dehumidifier in the greenhouse can save up to 50% on energy”

“Humidity is an important factor in any closed growth environment. But in many new greenhouse plans, dehumidification is neglected at the planning stage, leading to increased costs when high humidity becomes an issue,” says DryGair’s Dan Peltinov, explaining how dehumidification can best be done. is integrated in greenhouses.

Dan Peltinov is a co-founder of DryGair as well as CTO and Head of R&D. He is also chief project manager at Misha Refrigeration, which designs freezing and refrigeration systems for, among other things, the agricultural and food sector. As an engineer, Dan specializes in large-scale refrigeration, cooling and air control systems for various industries.

“It is better to design a greenhouse with dehumidification”
“Using dehumidification to control humidity has a big impact on the heating protocols. Greenhouses with dehumidifiers require much less heating. The main reason is ventilation. Traditionally, growers open the ventilation openings to drain the moisture, which also allows the heat to escape, and then they have to keep warm, “says Dan.

“Having a dehumidifier in the room that controls the humidity from inside reduces the need for ventilation. Growers can close windows and ventilation openings, improve insulation, install thermal screens and keep the heat in the greenhouse much longer. By doing this you can save up to 50% on energy, and as energy prices rise, these costs continue to rise. “

“So by including dehumidifiers in the initial planning phase, a greenhouse can achieve the same level of climate control with a much lower heating capacity. That means less infrastructure, but also much lower operating costs.”

Not complicated
“Adding a dehumidifier is almost always a good idea, even afterwards. It is always better to improve your growth conditions whenever possible and save future costs. However, it is much more efficient and cost-effective to design the ideal greenhouse before you build. that, instead of adding machines later, “says Dan, adding that if you include dehumidifiers in the initial design, you can optimize your space utilization and avoid having to rearrange bins or move other infrastructure to make room. “If you design your greenhouse with dehumidification already included, you can save a lot of unnecessary costs.”

Calculation of the difference between including dehumidifiers in the greenhouse plan
“Ideal greenhouse planning should be optimized for the best growth, but also for the lowest costs. Therefore, dehumidifiers are often not included. The logic is that there are already heating systems and ventilation, so why add extra costs? But a good plan would look ahead and consider the long-term costs. “

Dan explains: “Greenhouse planners need to compare both scenarios. The first is without dehumidification, which means a slightly lower initial investment, but higher energy costs and more infrastructure. The second scenario includes dehumidifiers in the initial design, which can increase the initial investment a bit. costs, but will contribute to lower operating costs in the future. Operating costs are mainly dependent on energy prices. Our experience shows that the payback period for DryGair is usually less than two years. “

“A comparison over several years would in most cases show that it is most cost-effective to design a greenhouse with dehumidification. Especially when you consider that many greenhouse growers are forced to add one later, after struggling with diseases such as botrytis. . “

“Not all greenhouse builders are aware of how big a difference humidification makes. Many people think that ventilation and heating are adequate. But in reality, we see that many greenhouses struggle to control humidity at night and early in the morning. So they still constantly dealing with diseases and fungal outbreaks.

Of course, there are many more benefits to dehumidification in addition to lower energy costs and disease prevention. By keeping the greenhouse closed, for example, you also conserve CO2. So no injections are needed to keep the photosynthesis rate high. The overall level of control is higher, so everything can be optimized more. “

Several benefits
There are a number of benefits that are unique to DryGair. “For example, the air circulation system built into each unit uses powerful fans and a patented distribution mechanism to blow the air out in all directions. It ensures uniform conditions in the greenhouse, so there is much less chance of the formation of humid microclimates.”

The fact that the dry air is blown out at leaf height or just above it also contributes to better growth. The leaves are where low humidity is most important. So by giving them the ideal conditions, growers can increase yields and improve quality. That’s one of the reasons why DGs are designed the way they are. “

For more information:
DryGair Energies
8 Hamanofim St, Herzliya
+972 977 309 89
www.drygair.com

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