AirScape 2.5 Guida all'installazione
ORDER # ____________
S/N:__________________
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(Required for warranty)
2.5/2.5E
WHOLE HOUSE FAN
INSTALLATION AND OPERATION MANUAL
© ALL RIGHTS RESERVED | AIRSCAPE I C.
WHAT'S INCLUDED
Prior to installation, please verify that you received all the accessories with the whole house fan.
The packages should include:
• BOX 1 of 3: damper door enclosure with grille, IOM, 8 metal and 4 wood screws, 4 S-hooks,
dual speed switch and plate or LCF Wireless Remote Kit or DLX Controller
• BOX 2 of 3: fan assembly, chain, duct tape
• BOX 2 of 3: Insulated acoustical flex duct
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page 1
CO GRATULATIO S on your purchase of the AirScape 2.5/2.5e Whole House Fan. This fan is
designed to provide you with quiet, natural, energy-efficient cooling for many years.
Please take a few minutes to read over the sections below to make sure you are prepared for the
installation. The building owner/occupant should read the section "Where to locate" below so that the
2.5/2.5e WHF will be correctly located to maximize effectiveness and efficiency of operation.
If you (or your installer) have any questions regarding the installation, operation, or maintenance,
please see AirScape technical support at www.airscapefans.com or call 1.866.448.4187.
WHAT YOU WILL NEED
• flat head screwdriver
• cordless screwdriver w/ Philips head bit and drill bits
• lumber, matching dimensions of the attic joists (2x6, 2x8, etc....)
• high quality latex caulk
• drywall cutter
• 3 wire cable 20g or larger (thermostat wire will work) and electrical box for mounting wall switch
(Only if no other controller has been ordered with unit)
WHERE TO LOCATE
Let's start with a little theory of operation: As your house heats up during the summer day, a large
amount of heat is retained in the building structure. Even though many summer evenings offer very
comfortable outdoor conditions, we are forced to either endure the hot conditions of our houses or turn
on the air conditioning and subject ourselves to the expense and possibly unhealthy air conditions.
AirScape Whole House Fans have been designed to run quietly and efficiently all night long. Building
materials give up their heat slowly (touch the brick on your house after sunset), and this method of
slow cooling extracts as much heat as possible from your house structure. Since the AirScape is one
of the quietest whole house fans on the market, it also allows you to get a good night's sleep.
FIGU E 1 – Location
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page 2
Guidelines for locating your whole house fan:
• Centrally located to ensure air is drawn evenly from multiple open windows
• AWAY from windows that will be opened so cool air is required to travel a long path to the fan
• At the highest point possible to exploit natural convective action
• ear an outlet or power supply to minimize electrical work
• Typically, the ideal location in a two-story home is in the open area at the top of the stairs
• Try avoid narrow spaces close to bedrooms, as this could amplify noise at night
(when noise perception is strongest)
Ceiling or Wall?
The 2.5/2.5e WHF intake box can be mounted in either the horizontal or vertical orientation. Our
recommended location is on a ceiling in the horizontal orientation -- keep in mind that it makes sense
to place the unit as high as possible to eliminate the hottest air from the house.
REQUIRED VENTING AREA
For proper operation of your AirScape unit, it is CRITICAL that your attic has sufficient venting area;
otherwise the hot air cannot easily escape and creates back-pressure that can substantially reduce the
performance of your new whole house fan.
The “net-free” area of a vent is the total vent opening minus the loss caused by the interference of the
screen, louver or grille covering the vent.
The AirScape 2.5/2.5e requires a MINIMUM of 5 sq ft of "net free" venting area in your attic to allow
for proper exhaust.
This means that it requires the equivalent of a 2 ft by 2½ ft unobstructed hole. Since most attics have
multiple vents, often of different types, and since most vents are partially obstructed by grilles and/or
bug/animal screens, you’ll need to do some calculations to make sure your venting is sufficient. While
it is our experience that most properly constructed houses have the required venting, not all do. And
because this is so critical to the proper operation of your unit, it is important that you verify it.
Different types of vent designs have different ratios of obstruction caused by grilles and screening and
manufacturers typically publish these numbers. If this information is not available to you, a ratio of 50%
is a good rule of thumb. For example a typical 24" x 24" louver, with a gross area of 4 sq ft, would have
a net free area of 2 sq ft.
Vent
Type
Length Width Net Free
Area (NFA%)
Calculation
L x W x NFA / 144
Louver 16” 16” 50 % = 16 x 16 x 0.5 / 144 = 0.89 sq ft
idge Vent 48” not used 13 % = 48 x 0.13 / 12 = 0.52 sq ft
Eave Vent 12” 4” 50 % = 12 x 4 x 0.5 / 144 = 0.16 sq ft
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page 3
• In practice, less net-free area than is recommended will decrease the airflow performance of the
unit.
• If you are unsure as to how much net-free venting you have, please consult a roofing
professional.
• et-free venting area can be acquired by any combination of gable, eyebrow, soffit, or
ridge vents, or any other means that provide ventilation to the attic space.
UNIT PARTS & DIMENSIONS
FIGU E 2 – Parts & Dimensions
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page 4
INSTALLATION - CARPENTRY
The 2.5/2.5e WHF has been designed to fit on top of a 14½" x 22½" wall or ceiling opening. Since
most modern houses have been built with either 16" or 24" on-center (O/C) spaced joists or studs, a
simple "box" is constructed in the wall/ceiling.
NOTE: There are two different installation methods determined by how the 2.5/2.5e will be inserted
into the attic. Please follow the instructions that apply to your install.
There is an existing attic access large enough for the 2.5/2.5e fan to fit through:
16” O/C Framing
Step 1: Install two 14½" cross pieces creating a box with inside dimensions 14½" x 22½" (Figure 3).
Step 2: Cut out dry wall inside the framed box.
24” O/C Framing
Step 1: Install two 22½" cross pieces creating a box with inside dimensions of 14½" x 22½" (Figure 3).
Step 2: Cut out dry wall inside the framed box.
FIGU E 3 – 16” O/C Framing
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page 5
The 2.5/2.5e fan needs to fit through the hole that is framed for it:
16” O/C Framing
Step 1: Cut out the dry wall between the joists to create a 23” x 14½" rough opening.
Step 2: Fit the 2.5/2.5e fan through the rough opening and into the attic.
Step 3: Install two 14½" cross pieces creating a box with inside dimensions of 14½" x 22½".
Make sure each cross piece partially covers the drywall cut out.
Approximately ¼” of each cross piece should be visible from below (Figure 4).
FIGU E 4 – 16” O/C Framing
24” O/C Framing
Step 1: Cut a 23” x 14½" opening in the dry wall, use an existing joist as the 23” long side.
Step 2: Fit the 2.5/2.5e fan through the rough opening and into the attic.
Step 3: Install cross pieces creating a box with inside dimensions of 14½" x 22½".
Make sure each cross piece partially covers the drywall cut out.
Approximately ¼” of each cross piece should be visible from below (Figure 5).
FIGU E 5 – 24” O/C Framing
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page 6
INSTALLATION – DAMPER OX
Position the 2.5/2.5e damper enclosure on top of the joists so that the damper doors are aligned with
the framed rough opening, being sure that there is easy access to the electrical box located on the
side of the unit (Figure 6).
The actuator end of the damper box has two “key holes” which are used to attach the damper box to
the joists. Mark the location of the “key holes” on the joists by placing the damper box over the rough
opening. Remove the damper box and fasten two of the provided wood screws so that the screw head
is slightly above the joist. Position the damper box over the “key holes” and slide to lock into position.
Use the remaining screws to attach the opposite side of the damper box.
Use a good quality latex caulk to seal all wood-to-wood and wood-to-metal joints to create an airtight
enclosure. This is important to ensure that all air drawn in by the fan will be from inside the house.
Attach the interior grille to the joists with the included wood screws.
FIGU E 6 – 2.5/2.5e WHF Damper Enclosure Installed
INSTALLATION – DAMPER COLLAR
• Remove the two screws that hold the damper collar in place for shipping.
• Position elliptical collar over damper box opening.
• Secure 2 screws (Figure 7, step 1).
• Stretch the collar until the 2 holes line up with the holes on the damper box body. Fasten with two
screws (Figure 7, step 2.1).
• Fasten all remaining screws, including the 2 original screws (Figure 7, step 2.2).
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page 7
FIGU E 7 – Damper Collar Installation
INSTALLATION – FAN AND DUCT
Attach 4 S-hooks to 4 of the D-hooks on the fan housing. Hang the fan from the attic rafters using 4
lengths of the supplied chain (Figure 8). The 4 lengths of chain are used to support the weight of the
fan and to eliminate any swaying motion. Tape down any unused D-hooks to avoid excess rattling.
Slide one end of the flexible duct over the damper box collar and fasten with 4 self tapping sheet
metal screws (Figure 9). Seal the joint with the included duct tape to make the seam airtight.
Attach the other end of the flexible duct to the collar on the back of the fan using the remaining sheet
metal screws (Figure 9). Finish by wrapping the joint with the provided tape to make the seam airtight.
The duct should be gently bent 90 degrees for maximum sound attenuation and airflow (Figure 10).
Avoid sharp bends in the duct or contact with metal fixtures, pipes, or conduits. The duct section
immediately before the fan should be as straight as possible to ensure smooth airflow to the fan.
Once the fan is balanced and secure, close all S-hooks with pliers to ensure stability.
Plug the fan control cord with the white male end into the white connector on the damper box.
Note: The 2.5e fan has a separate power cord that must also be plugged into a 120v outlet
with uninterrupted power once all other installation has been completed.
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page 8
FIGU E 8 – Hanging the Fan
FIGU E 9 – Duct to Damper and Duct to Fan Connections
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page 9
FIGU E 10 – Fully Installed View
INSTALLATION – WIRING (LOW VOLTAGE HARDWIRED SWITCH)
Please make sure that local codes and standards are followed when performing the
following steps. Make sure that the appropriate circuit breakers are turned off and that the
unit is unplugged when performing these steps.
ote: If you purchased your unit with an optional DLX Controller see Controller IOM for
installation instructions. If a Wireless Remote was purchased, it has already been
installed on your unit. Skip to the START UP AND OPERATION section.
Step 1: Run a 3-wire cable 20 gauge or thicker for the 24v low-voltage wiring from the damper enclosure to
the provided wall-mounted double switch. This 3-wire cable is OT supplied with the unit but is widely
available (doorbell or thermostat cable is acceptable).
Step 2: Connect the control wiring with wire nuts to the three wire leads wired in the back of the wall switch –
red, black and blue/white. Secure the face plate once the connections are made (Figure 11).
Step 3: Connect the wires to the terminal block on the circuit board (Figure 12).
Step 4: Make sure the switch is in the OFF position. When ready, plug in the two power cords (from the
speed control and from the damper unit) into 120-volt outlets with uninterrupted power.
The wall switch must be mounted in an approved electrical box large enough to accommodate the entering
wires. Use approved methods such as wire nuts to connect wire ends.
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page 10
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