Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
|
What is a btu? |
A unit for measuring the rate at which energy travels |
|
|
Best definition for infiltration? |
Air flow inward through cracks and gaps |
|
|
What is ability of oxygen to pass through a material referred to as? |
Oxygen permeation |
|
|
Define r value |
Ability of materials to resist heat transfer |
|
|
How does forced air heating systems heat a room? |
From ceiling Down to floor |
|
|
How does finned rads heat? |
Convection |
|
|
How does human body release heat? |
Conduction, convection, radiation and evaporation |
|
|
Why is set back thermostat not recommended for radiant floor heating? |
Designed to maintain a set temperature and responds too slowly |
|
|
What provisions are made when hydronic heating is installed in a buildings? |
A means of exchanging air within a building |
|
|
Properly designed radiant floor heating can be used in what heating applications? |
Residential, commercial, industrial, agricultural, snowmelt, and sports fields |
|
|
Which heating system best suits an application that requires minimum air movement? |
Radiant floor heating |
|
|
What are three categories of piping used in radiant floor heating systems? |
Metallic synthetic and composite |
|
|
Which tubing must have a protective coating to prevent oxygen permeation? |
Pex |
|
|
To prevent excessively long circuits |
To prevent excessively long curcuits |
|
|
What are manifolds constructed of? |
Plastic, brass, copper |
|
|
What is a function of a balancing valve on a manifold? |
To ensure equal flow rate to each circuit |
|
|
Max floor temp area for where people stand |
77F or 25C |
|
|
Radiant floor heating operates at temps lower than? |
140F |
|
|
Who or what decides indoor design temp? |
Occupant |
|
|
What is required for an accurate heat looks calculation? |
Complete set of building drawings |
|
|
What is recommended when dimensioning a room |
Round to nearest 0.25 ft |
|
|
Gg |
Bitch |
|
|
Jk we back |
Bitch |
|
|
Which floor covering has greatest r value |
Carpet and underlay |
|
|
What can affect the way a house is zoned? |
North and south exposures |
|
|
What two factors to determine floor surface temp |
Btu/sqft and room temp |
|
|
Double wall serpentine best suited for? |
Room with 2 adjacent walls to outside |
|
|
Header size |
Gpm and velocity |
|
|
H |
H |
|
|
What is the rating at the boiler nozzle? |
Outlet |
|
|
H |
H |
