Hydronics systems for greenhouses can be more expensive than the average steam-heated set-up, but offer more advantages in the way of increased efficiency, lower fuel costs, and special opportunities for specific crop types. Decreased fuel costs alone from a more efficient boiler system can run thousands a year.
For plant types such as tomatoes and some flowers, your boiler can be adjusted to run at zero CO, allowing the warm CO2-rich exhaust gases to be vented directly into the greenhouse and eliminating the need for an expensive CO2 generator or additional heating source.
At a level of below 340 ppm, significant negative effects happen to crops, including delayed growth, lower plant quality, and eventually plant death. Increased levels can result in faster growth rates, earlier, larger, and healthier flowers, better overall plant quality, and higher fruit and plant yields. CO2 supplementation is especially important to consider for greenhouse buildings in colder climates, where the insulation used to conserve energy works to keep natural CO2 out of the greenhouse.
A greenhouse structure is highly affected by sunlight, and a warmer day or season can cause a decreased need for heating. An often overlooked factor when choosing a new boiler is the turndown ratio, the lowest setting a boiler can be run on. It may be more efficient to run a smaller boiler at it’s highest capacity than run a larger boiler at a portion of its capacity.
When replacing old units and/or building a new greenhouse it’s important to choose the best product for the job. Our modulating condensing hot water boilers can be made to run on a variety of fuels, including biogas. With efficiency rates as high as 98%, stainless steel materials used for construction, and low noise levels even at maximum output (high fire), our products are a superb addition to any greenhouse.