HVAC Rough Flashcards
The air handler and/or gas furnace in the attic is to be hung ________, _____________, and secured from all four corners of the unit to the top chord of the trusses.
plumb, level,
The air handler is to be completely sealed to the ___________ to eliminate any air intake from the attic, walls, or garage.
plenum/platform
The plenum is to be completely sealed to the air handler using a _________ type product.
mastic
The air handler panel door is to be installed using __________ clips or ___________. (No tape).
- plastic
- screws
Line sets at the air handler are to be completely sealed to the unit using a ________ __________.(No cork tape).
silver tape
All unused openings on the air handler are to be plugged with a _________ type or ____________ plug. (No tape).
- plastic
- approved
Condensate lines to slope min. _______” per foot away from pan (no reverse fall, humps, or bellies).
1/8”
Primary condensate line installed on the exterior of the home approximately ______”- _____” AFF, extend _______”-_________” past the stucco with a 90° elbow at the end.
- 6” - 8”
- 2” - 3”
Secondary condensate line to terminate above a clear __________ (no obscure or glass block), extend past the pop out with a 90° elbow at the end.
window
Run all ______________ lines separately.
condensation
Condensate lines are to be run ____________ in the middle of the stud.
vertically
No pipe __________ is to be left on any exposed concrete.
glue
The condensate pan should slope _____” per foot.
1/4”
What is the tolerance for construction material, or debris in the pan?
No tolerance
All metal to metal duct connections are to be sealed with an approved ___________ type product to prevent air leaks.
mastic
Flex duct is to be kept a min. of ______” from the roof sheeting.
2”
Flex duct is to be secured every _____’.
4’
Flex duct must retain ______% of the diameter of the duct.
80%
Furnace flue pipes are to extend _____”-_______” above the roof tile to the bottom of the flue cap
12” - 24”
Flue pipes above the roof line are to be plumb within a _____” per foot.
1/4”
All furnace flue pipes and hot water heater B-vents are to have _________ collars.
storm
All hood, dryer, and exhaust vents that terminate on an exterior wall are to be plumb & level. What is the tolerance?
No tolerance
A sheet metal (insulation) barrier is to be installed around all hot water heater _________ pipes. The sheet metal barrier is to be approx. __________” in height and is to maintain a min. _______” clearance from any combustible material.
- flue
- 24”
- 1”
A ________” tall, sheet metal dryer box is to be installed directly on the bottom plate at all ________ locations.
- 24”
- dryer
Keep all roof penetrations a min. of ________” from any hip, ridge, valley, other penetration, and a min. of _________” from any horizontal edge of roof sheeting.
- 24”
- 12”
All penetrations through shear walls or roof sheeting must be ______-cut to avoid damage to the OSB. Do Not Blow Holes Through Sheeting.
Saw
Both the liquid line (small pipe), and the suction line (large pipe) are to be wrapped with __________ insulation inside the wall cavity from the bottom plate to the top plate.
Armarflex
The entire suction line (large pipe) from the condenser unit to the air handler is to be wrapped with ___________ insulation.
Armarflex
The line-sets are to be supported or secured approximately every _______’ in the attic.
10’
The wall jack where the line-sets stub out of the exterior wall should be secured to the bottom plate and wall studs at a min. of ______ of its 4 sides.
2
The line-sets are to be sealed to the exterior wall jack with an approved ___________ or ______ __________ _____________.
- caulking
- UV resistant tape
Line sets are to be Quick -______________.
flashed
All HVAC penetrations in the rigid air barrier material to the exterior and/or unconditioned space are to be __________ cut, and be no more than _____” larger than the penetrating object (to allow for proper air sealing). Penetrations are to be completely air sealed with foam, caulk, or mastic (no fibrous insulation).
- Cleanly
- 1”
All HVAC components are to be sealed at all joints & corners with a Shea Homes approved __________ (including all pre-fabricated joints).
mastic
All metal ductwork is to be mechanically fastened with _________ (tape of any kind is not a mechanical fastener).
screws
Flexible ducts are to be attached at the inner liner by first sealing the liner to the collar with mastic then using nylon/plastic __________ straps tightened with an approved manufacturer’s tool.
Panduit®
All ductwork outside the conditioned air space (including exterior wall cavities) is to be completely insulated to a minimum ________. Insulation is to be strapped to the collars, and at duct to duct connections with tape or ___________ straps.
- R-6
- Panduit®
Flexible duct is ________ to be in direct contact with either the roof sheeting or the sheetrock(ceiling).
not
Flexible duct (including ventilation duct) is to be supported a minimum of every _____’ and have no bends greater than _____°.
- 4’
- 90 degrees
Flexible ducts in _________________ space are not to be installed in cavities smaller than the outer duct diameter.
unconditioned
Flexible duct in ____________ space are not to be installed in cavities smaller than the inner duct diameter.
conditioned
A “Shea Family _________ ________ ________” fresh air ventilation system is to be installed, filtered ,and is to include a means of occupant control.
Fresh Air Intake
The fresh air intake duct is to be insulated to a minimum R-6 and shall terminate to the ____________ of the home, and include a manual damper, or other means of occupant control.
exterior
The fresh air intake duct is to be installed a minimum a _____’ from any exhaust vent, or plumbing stack.
10’
The fresh air intake vent shall have a rodent/insect screen with ≤ ___” mesh.
1/2”
