HVAC

Question 1

How is the air handler and/or gas furnace in the attic to be installed?

Answer 1

It should be hung level and square from all 4 corners of the unit to the top cord of the trusses.

Question 2

How should the air handler be sealed to the plenum?

Answer 2

Completely sealed using a mastic to eliminate any air intake from the attic, walls or garage.

Question 3

The air handler door should be installed with what?

Answer 3

Screws or plastic clips. No tape.

Question 4

Condensate lines are to slope a minimum _____ inch per foot away from the pan?

Answer 4

1/8”

Question 5

Where should the primary condensate be installed?

Answer 5

6” - 8” AFF, and extend 2” - 3” past the stucco with a 90° elbow at the end.

Question 6

Where should secondary condensate lines be installed?

Answer 6

They should terminate above a clear glass window, extend past the popout with a 90° elbow at the end.

Question 7

Should any of the condensation lines be run together?

Answer 7

NO! They should all be run separately.

Question 8

How should the condensate lines be run inside the walls?

Answer 8

In the middle of the stud and top plates.

Question 9

How much slope should be on the condensate pan?

Answer 9

1/4” per foot

Question 10

What’s the tolerance for debris in the condensate pan?

Answer 10

No tolerance for any debris.

Question 11

What should all metal to metal duct connections be sealed with?

Answer 11

They should be sealed with an approved mastic type product to prevent air leaks.

Question 12

How far should flex duct be kept from the roof sheathing?

Answer 12

Minimum of 2”

Question 13

Flex duct should be secured every ________ feet ?

Answer 13

Every 4’

Question 14

What’s the minimum inside diameter flex duct must retain?

Answer 14

80%

Question 15

How far above the roof line should furnace flue pipes extend?

Answer 15

Between 12” - 24” from the roof tile to the bottom of the flue cap

Question 16

Flue pipes above the roof line are to be plumb within _____ of an inch per foot?

Answer 16

1/4”

Question 17

All furnace flue pipes and B-vents are to have what installed on them?

Answer 17

Storm collars

Question 18

What’s the tolerance for plumb/level on exterior vents for fans, hoods, and dryers?

Answer 18

No tolerance

Question 19

What is to be installed around all hot water heater flue pipes?

And how tall should it be?

Answer 19

A sheet metal insulation barrier.

It should be approx. 24” high, and maintenance a minimum 1” clearance form any combustible.

Question 20

How tall should the dryer box be?

Answer 20

24”

Question 21

What’s the rule for the distance roof penetrations need to be from hips, ridges, valleys and each other.

Answer 21

24”

Question 22

What lines are to be wrapped with Armarflex and where?

Answer 22

The liquid line (small line) is wrapped inside the wall cavity.
The suction line (large line) is wrapped all the way from the condenser unit to the air handler.

Question 23

Line sets in the attic should be secured every _________ feet?

Answer 23

Every 10’

Question 24

All exterior HVAC wall penetrations except combustible vents, wall hood vents, and exhaust fans are to be installed with what?

Answer 24

Quickflash

Question 25

How are the line-sets to be sealed at the exterior wall jack?

Answer 25

With an approved caulking or UV resistant tape.

Question 26

All HVAC penetrations in air barriers (to the exterior or unconditioned space) are to be no larger than _____ the penetration object.

Answer 26

1”

Question 27

All metal ductwork is to be mechanically fastened with what?

Answer 27

Screws (tape is not acceptable)

Question 28

Flexible ducts are attached in what way?

Answer 28

First attaching the inner liner to the collar with mastic then using plastic Panduit straps tightened with an approved manufacture’s tool.

Question 29

All ductwork outside conditioned air space is to be completely insulated to a minimum _____?

What is to be strapped to the collars?

Answer 29

R-6

Insulation

Question 30

Flexible ductwork is not to be in direct contact with _______?

Answer 30

Drywall (ceiling)

Question 31

All unused openings on the air handler should be plugged with what?

Answer 31

A plastic or an approved plug, no tape.

Question 32

All HVAC components should be air sealed at all joints and corners with what?

Answer 32

A Shea approved mastic. Including all pre-fabricated joints.

Question 33

Flexible duct in UNCONDITIONED space are not to be installed in cavities smaller than what?

Answer 33

Smaller than the outer duct diameter.

Question 34

Flexible duct in CONDITIONED space are not to be installed in cavities smaller than what?

Answer 34

Smaller than the inner duct diameter.

Question 35

A Shea Family Fresh Air Intake ventilation system is to be installed , filtered and with what?

Answer 35

A means of occupant control

Question 36

The Fresh Air intake duct is to be insulated to a minimum of what R-value?

Answer 36

R-6

Question 37

The Fresh Air intake duct shall terminate where and have what type of damper?

Answer 37

Terminate to the exterior of the home.

Have a manual damper, or some type of occupant control.

Question 38

The Fresh Air intake vent shall have a rodent/insect screen with what size mesh?

Answer 38

1/2” or less