HVAC is more than a few pieces of mechanical equipment. It is an essential and integral component of every successful cold or hot climate 4seasons Garden Farming Facility!


  • An HVAC system works best when it takes local climate and initial pre-planned building designs into account.
  • In a “pre-planned” green-built facility, heating and cooling equipment in each room can be smaller, less costly, and less complicated.


Energy conservation, indoor air quality, and growth environment are among the core green building issues encompassed by heating, air-conditioning and ventilation design. These interrelated systems can be complicated, expensive to install and costly to operate but green buildings also offer many opportunities to simplify and save. Central to the premise of thinking one grow room at a time, are the many passive solar features built into a garden farming green facility. HVAC design follows other fundamental building steps that can collectively reduce the size of the heating and cooling system by 30-50%. Solar orientation, insulation, window placement and design, even vegetation on the building site all directly affect heating and cooling loads. Designing a system based on real demand, not conventional practice is essential.


  • FNG makes sure our HVAC designs heating, and cooling equipment, are matched to and according to established industry procedures.
  • We design the HVAC system in conjunction with other building components, including insulation, windows, solar mass, and orientation.
  • We reduce the size, expense, and complexity of mechanical systems as much as possible where possible.
  • We install adequately sized fans in all grow rooms, meeting & training rooms, bathrooms, common rooms, deli, market, and kitchens.
  • In facility ventilation system, augmented heat recovery ventilator captures and stores latent heat.
  • Specify high-efficiency heating equipment and air conditioners with a high SEER.
  • In forced-air systems, run ducts through conditioned space where possible and seal all duct connections with mastic.
  • Avoid electrical resistance heating unless it’s used only on an intermittent spot basis.


Heating, ventilation and air conditioning (HVAC) is the technology of indoor and vehicular environmental control and comfort. Its goal is to provide thermal ecological controls of acceptable indoor air quality. HVAC system design is a sub-discipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. HVAC is an integral part of both commercial and residential structures such as indoor greenhouses, single family homes, apartment buildings, and senior living facilities. HVAC also includes medium to large industrial and office buildings, skyscrapers and hospitals, onboard vessels, and in marine environments, where safe and healthy building conditions are regulated for temperature and humidity, using fresh air from outdoors.

The three central functions of heating, ventilation, and air conditioning are interrelated, especially with the need to provide thermal environmental controls for comfort and acceptable indoor air quality within reasonable installation, operation, and maintenance costs. Ventilation (the V in HVAC) is the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odours, smoke, heat, dust, airborne bacteria, carbon dioxide, and other gases. Ventilation removes unpleasant smells and excessive moisture, introduces outside air, keeps interior building air circulating, and prevents stagnation of the interior air. Ventilation includes both the exchange of air to the outside as well as circulation of air within the building. It is one of the most critical factors for maintaining acceptable indoor air quality in buildings and indoor garden farms. Methods for ventilating a structure combine mechanical/forced and natural types. FNG Garden Farm HVAC systems designed for the individual grow room.