What type of zone control to some communicating ductless mini-split systems use?
What will be an ideal response?
Answer: Variable refrigerant velocity systems have multiple indoor coils connected to a single outdoor condensing unit that has a variable speed compressor. The communicating control system allows the unit to match its capacity to the combined required capacity of the multiple indoor units
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A typical piston ring exerts less than ____ pounds (lbs) of spring tension against the cylinder wall.
a. two b. five c. seven d. ten
At the very start of the estimating process, the estimator can set up the summary sheet by checking off the trades that will be completed by "own forces" and those that will be subcontracted.
Answer the following statement true (T) or false (F)
What types of pliers are primarily used for mechanical HVACR work?
What will be an ideal response?
A 1000 W load that operates for one hour consumes the same amount of energy as a 100 W load that operates for 10 hours
Indicate whether the statement is true or false