Heat Loss Calculation Flashcards
(31 cards)
Which direction does the heat always travel
From warm objects to cooler
What is not considered when calculating heat loss
Interior walls of the building
ODT is the acronym for
Outdoor design temperature
What does the designed temperature difference refer to
The indoor temperature minus the outdoor temperature
What is the recommended practice for determining room dimensions
Measurements should be rounded up or down to the nearest 0.25 of a foot
Which type of heat loss results in cool air from the outside being drawn into the building through cracks around windows, doors and loose construction
Infiltration losses
Which of the following heat loss types transfers heat through a ceiling
Transmission losses
Finned baseboard heating capacity is expressed in
Btu per hour per liner foot
Which type of application are kickspace heating units ideal for
Wall space is limited due to cabinets and cupboards
What are 3 major components of a finned baseboard
Radiant fin, housing and supply tube
What is the main function of the adjustable damper on a baseboard cabinet
To slow or increase the convection air flow
What is tge procedure for calculating the amount of finned baseboard required in a given space
Divide the space heat loss by the output rating of the baseboard selected
At design, which 2 factors determine the output of a finned baseboard
Supply water temperature and gpm
What must be known in order to properly size a boiler
The total net heat loss of the space being heated
What causes frequent cycling of a boiler
A boiler with an output that is to high for the application
Which of the following should be followed to ensure proper boiler start-up
The boiler manufacturer
Flow rate, temperature drop and pressure drop are used to size
The size of piping
Which gallon flow rate will deliver 35,065 Btu per hr at a 20* f
3.5 gpm
What must be known in order to properly size the output of a pump for a hydronic heating system
Required gpm and total feet of head
What is the main function of an expansion handling device
To allow the water in the system to expand and contract as the system water heats and cools
How do diaphragm tanks differ from standard closed expansion tanks
Diaphragm tanks have a bladder that separates the water and air
I which section of the heating code will you find definitions
Section 2
In which section of the heating code is quality of work referenced
Section 3
Which section in the heating code deals with hydronic space heating
Section 12
