Product Brochure
U-Factor: The heat transfer per time per area and per degree of temperature difference. The U-factor multiplied by the interior–exterior temperature difference and by the projected
fenestration product area yields the total heat transfer through the fenestration product due to conduction, convection, and long wave infrared radiation. Expressed here in units of
Btu/h.ft2.°F.
Solar Heat Gain Coefficient (SHGC): The ratio of the solar heat gain entering the space through the fenestration product to the incident solar radiation.
Expressed as a value between 0 and 1.
Air Leakage (AL): Measures the rate at which air passes through joints in the window. AL is measured in cubic feet of air passing through one square foot of window area per minute.
The lower the AL value, the less air leakage. Most industry standards and building codes require an AL of 0.3 cf·m/ft².
Feather River offers ENERGY STAR
certified door models in all 50 states.
Glazing
Level
U-Factor
1
SHGC
2
Opaque ≤0.17 No Rating
Northern
North-Central
Southern
South-Central
≤0.25 ≤0.25
≤0.30
≤0.40
≤0.25
≤1/2 Lite
>1/2 Lite
Air Leakage for Swinging Doors ≤ 0.5 cfm/ft
2
1 Btu/h.ft2.°F 2 Fraction of incident solar radiation.
Effective: 1/1/2015
FUNCTIONALITY
All Feather River Fiberglass Doors are energy efficient and designed to
stand up to all seasons so your home stays warm during the winter months
and cool during the summer. Imagine the savings from a fiberglass door
which is up to five times more energy efficient than a traditional wood door.
Most of our doors are ENERGY STAR certified. The chart beginning below
and continuing on page 13 shows a listing of the U-Factor and SHGC (Solar
Heat Gain Coefficient) for all of our Exterior Door Products. Certified units
must hit the U-Factor, Solar Heat Gain Coefficient in their climate zone, and
air leakage listed in the chart to the right. Visit energystar.gov for your area’s
climate zone detail.
ENERGY RATINGS INFORMATION
In some years the government has offered a federal tax credit for energy efficient products that meet or exceed ENERGY STAR performance
levels for doors. Please visit irs.gov and energystar.gov for additional information regarding tax credit availability or visit featherriverdoors.com for
additional information regarding energy efficiency. PVC jamb ratings shown in chart. See the “Performance Data” page chart on our website
for most current ratings.
NFRC Size Designation Feather River Sidelite Description
1/4 Lite 65 sq in N/A
1/2 Lite 281 sq in Craftsman (Mahogany), Half Lite, Center Arch (Oak), Metro(4-5-6 Lite Small)
3/4 Lite 391 sq in
Center Arch (Mahogany), 3/4 Lite (Oak, Smooth, Mahogany),
Full Lite (Oak, Smooth, Mahogany—12"/10"),
Full Lite (Smooth Impact— 10")
Full Lite > 391 sq in
Full Lite (Mahogany—14"), Full Lite (Teak—14"/12"),
Full Lite (Smooth Impact—14"/12")
Opaque/No Glass N/A
NFRC Size Designation Feather River Door Description
1/4 Lite 410 sq in
Fanlite, Craftsman (Mahogany), Craftsman Rectangle, Craftsman Arch,
Center Arch, 3/4 Oval (Smooth, Smooth Impact—30"),
Metro (3-4-5-6 Lite Small, 3-Lite Mix, 1-3 Lite Square),
Teak (3-Lite Small, 3-Lite Large)
1/2 Lite 900 sq in
Half Lite, 3/4 Oval (Mahogany, Oak, Smooth Impact—36"), Center Arch (8/0),
Cottage Craftsman Arch, Full Oval, Metro (3-4 Lite Large, 3-4-5-6 Lite Narrow, 1-2 Lite
Straight), Teak (Lighthouse, 2-Lite, 1-Lite, 4-Lite)
3/4 Lite 1100 sq in 3/4 Lite (Oak, Smooth), Half Lite (Oak, Smooth, 8/0)
Full Lite > 1100 sq in
3/4 Lite (Mahogany), Half Lite (Mahogany, 8/0), 3/4 Lite (8/0), Full Lite, Full Lite RT,
Metro (4-Lite Large)
Opaque/No Glass All Panel Doors
ENERGY RATINGS CHART
12
ENERGY EFFICIENCY & RATINGS
Teak Woodgrain Style Fiberglass Entry Doors & Sidelites
Note: Transoms do not qualify for the tax credit. Any tax credit, if available, would be based on “qualified” Door with Sidelites or Double Door configuration.
Note: Ratings shown here are with PVC Jamb. Wood jamb ratings can be found in the “Performance Data” section on featherriverdoors.com.
Will not qualify under ENERGY STAR guidelines.
TYPE SWING GLAZING
1/4 Lite ≤ 410 sq in 1/2 Lite ≤ 900 sq in 3/4 Lite ≤ 1100 sq in Full Lite > 1100 sq in
U-factor SHGC U-factor SHGC U-factor SHGC U-factor SHGC
Fiberglass
Door
Inswing &
Outswing
Triple Pane—Decorative Glass 0.23 0.12 0.25 0.11 N/A N/A N/A N/A
Triple Pane—Obscure (5mm) Glass 0.23 0.12 0.25 0.11 N/A N/A N/A N/A
Triple Pane—Obscure (5mm) Glass with Grid N/A N/A 0.25 0.09 N/A N/A N/A N/A
Dual Pane—Low E-270 (Clear) 0.22 0.07 0.23 0.07 N/A N/A N/A N/A
Dual Pane—Low E-270 (Internal Grille) N/A N/A 0.23 0.05 N/A N/A N/A N/A
TYPE SWING GLAZING 1/4 Lite ≤ 65 sq in 1/2 Lite ≤ 281 sq in 3/4 Lite ≤ 381 sq in Full Lite > 381 sq in
Fiberglass
Sidelite
Inswing &
Outswing
Triple Pane—Decorative Glass N/A N/A N/A N/A N/A N/A 0.29 0.17
Triple Pane—Obscure (5mm) Glass N/A N/A N/A N/A N/A N/A 0.29 0.17
Dual Pane—Low E-270 (Clear) N/A N/A N/A N/A N/A N/A 0.27 0.10
Air Leakage ≤ 0.3 cfm/ft
2