Deck 10: Hydronic Radiant Panel Heating

Question 1

Thermal radiation is constantly emitted from our skin and clothing surfaces to any cooler surfaces around us.

Answer 1

True

Question 2

Most radiant ceiling panels have low thermal mass allowing them to slowly warm up following a cold start.

Answer 2

False

Question 3

Suspended tube systems operate at relatively low water temperatures in comparison to other types of radiant panels.

Answer 3

False

Question 4

A hydronic radiant panel is any object warmed by passing heated water through tubing embedded in or attached to it, and which releases at least ____ of that heat to its surroundings as thermal radiation, and has a controlled surface temperature under 300 °F.

A) 80%
B) 60%
C) 50%
D) 40%

Question 5

In most cases, the system piping method and control technique used are mutually dependent.One cannot be used without the other.

Question 6

The useful heat output of a radiant panel is expressed as the rate of heat flow into the room per unit of area of radiant panel surface.This is called the room side ____.

A) variance
B) temperature degree
C) heat "sink"
D) heat flux

Question 7

Another circuit routing pattern for floors is called a ____.This tubing pattern is not designed to bias heat output toward exterior walls.Instead, it is intended to provide the same average heat output over the entire floor area.

A) serpentine
B) zigzag
C) counterflow
D) core

Question 8

When circuit lengths are significantly different, or when circuits supplied from the same manifold station will operate as separate zones, a(n) ____ manifold station should be used.

A) valveless
B) circuit-balance
C) actuated
D) valved

Question 9

Gypsum underlayment contains considerably more water than does an equal volume of concrete.

Question 10

One priciple of tubing design is to install manifold stations in central locations to ____ tubing runs between the manifold station and the room(s) to be heated.

A) straighten
B) minimize
C) maximize
D) economize on

Question 11

In the case of floor heating, the average surface temperature of the floor should not exceed 85° F in rooms where prolonged foot contact with the floor is likely.

Question 12

The profiles for baseboard convectors and forced-air systems reveal lower than ideal temperatures near the floor, as well as higher than ideal temperatures near the ceiling.This undesirable effect is called air temperature ____.

A) discharge
B) stratification
C) modulation
D) wastage

Question 13

The size of the tubing used in a heated slab has a relatively small effect on the slab's heat output.

Question 14

The availability of insulation in various materials and thicknesses will in part determine the R-value installed.

Question 15

All hydronic radiant panel systems are created by placing tubing into the ____ of a room.

A) outer perimeter
B) floor, walls, or ceiling
C) areas of thermal loss
D) heat loss zone

Question 16

The best-known type of hydronic radiant panel is a heated floor.Currently, floors account for over 90% of all hydronic radiant panel installations.

Question 17

Poured gypsum underlayments have been used for many years to level uneven floor surfaces, as well as to decrease sound transmission and increase the fire resistance of floor assemblies.They are now widely used for ____ radiant floor heating.

A) thin-slab
B) slab-on-grade
C) concrete slab
D) suspended

Question 18

In some buildings, slab or thin-slab-type radiant panels are not possible.One alternative is called a tube and plate system.Instead of concrete or gypsum, this system uses ____ heat transfer plates to laterally conduct heat away from the tubing.

A) PEX
B) flanged
C) graphite
D) preformed aluminum

Question 19

Radiant heating is the process of transferring thermal energy from one object to another by ____.

A) convection
B) conduction
C) nuclear radiation
D) thermal radiation

Question 20

Hydronic radiant panel heating, like other types of hydronic heating, are not easily configured for room-by-room zoning.