Which is a term that describes heat loss through the glazing, metal purlins, barcaps and doors of a greenhouse?
Which is a term that describes heat loss through cracks or openings around glass panels, doors and fans of a greenhouse?
Which is a term that describes a heating system that generates heat in one location and distributes that heat energy to many locations or throughout a large greenhouse complex?
Which is a term that describes a heating system in which the heat is generated within the greenhouse structure that it is intended to heat?
Which is an advantage of using steam rather than hot water to distribute heat throughout a greenhouse complex?
At what temperature is steam that is generated in a boiler and used to heat greenhouses?
Which is the term for the amount of heat energy required to raise 1 lb of water 1(Degree)F?
Which is a fuel source that could be used in a central heating system for a greenhouse complex?
Which is the part of a unit heater that collects hot exhaust, allows the transfer of heat energy from the exhaust to the air inside the greenhouse and allows the exhaust to be vented to outside of the greenhouse?
As the diameter of the pipe used to distribute hot water throughout a greenhouse (in a central heating system) increases, how does the number of Btu delivered (or released) per linear foot of pipe change?
Out of which material may pipes used to distribute steam in a central heating system be made?
Which is an advantage of "finned" pipe as compared to "smooth" pipe when used in a greenhouse heating system?
What is the primary purpose of HAF fans when used in greenhouses?
Which is a common name for a heating system that uses rubber tubes to circulate hot water in close proximity to the plant roots and increase the temperature of the root substrate?
Which is a fuel source that cannot be used in unit heaters in greenhouses?
What would be a typical heat transfer coefficient (Btu/ft(Square)/hr/(Degree)F) for a single layer of glass used as a greenhouse glazing?
What would be a typical heat transfer coefficient (Btu/ft(Square)/hr/(Degree)F) for a double layer of glass used as a greenhouse glazing?
What would be a typical heat transfer coefficient (Btu/ft(Square)/hr/(Degree)F) for a single layer of polyethylene film used as a greenhouse glazing?
What would be a typical heat transfer coefficient (Btu/ft(Square)/hr/(Degree)F) for a double layer of polyethylene film used as a greenhouse glazing?
With respect to greenhouse construction and maintenance, which would be an important method of heat conservation?