Almost Heaven Saunas Preston Operating instructions

Preston Sauna
Installation &
Owner’s Manual
Revised February 2017

Read this entire manual through to the end before proceeding with the assembly.
CHECK YOUR BOXES
Be sure to immediately check your boxes against your shipping list and bill of lading. Examine for any damage and notify
Almost Heaven Saunas is there needs to be a repair or replacement of damaged or missing materials.
ELECTRICAL REQUIREMENTS
All electrical wiring must be performed by A QUALIFIED LICENSED ELECTRICIAN. Because of the heat involved in the
sauna, it is required that you use copper wire with 90ºC insulation. Do not use aluminum wire to make the connection.
Consult with an electrician so you can determine the requirements for your particular situation. All wiring must conform to
all national, state and local codes and regulations and according to the instructions provided with the heater.
LOCATING THE SAUNA
Your Preston Indoor Sauna was specifically designed to utilize your existing floor. As such, assembly is made very simple
since the entire sauna sits on pre-fabricated rails and risers rather than on an integral floor platform. Your saunas can be
assembled on any surface that is firm and flat, including concrete, ceramic, vinyl, laminate, or tile. (Installation on a
carpeted surface is not recommended.)
ASSEMBLY
Two people should be involved in the assembly of the Preston Sauna. The wall and roof sections are large and need two
individuals to lift and hold in place during assembly.
BASIC TOOLS
You should have the following tools:
- Cordless drill for driving screws
- 1/8” drill bit
- Stepladder or stool
- Rubber mallet
- Claw hammer
- Screwdriver (Phillips and Flathead)
- Framing square
- Utility knife
- Level
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Almost Heaven Saunas
888.355.3050
[email protected]
Preston Sauna Packing List
☐4 Floor Risers
☐4 Wall Support Rails
☐Wall Section A
☐Wall Section B
☐Wall Section C
☐Wall Section D
☐Wall Section E
☐Wall Section F
☐Wall Section G
☐Window Section H
☐Door Section I
☐Window Section J
☐4 Roof Support Rails
☐3 Roof Sections
☐2 pieces of roof trim
☐Lower Bench
☐Upper Long Bench
☐Upper Side Bench
☐Back rest with pre-
mounted LED light
☐LED power supply
☐Short Back Rest
☐Hardware packet
☐Bucket with liner
☐Ladle
☐Thermometer/hygrometer
☐Door knob kit
☐Heater fence kit
☐Harvia 8.0kw heater
☐Box of sauna stones
☐Assembly manual packet
☐Vertical bench support

1. Connect the 4 FLOOR RISERS
Your existing floor will serve as the floor for your sauna. The
pre-fabricated rails and risers will be placed on your existing
floor and provide the structural support for the sauna room. The 4
floor risers are pre-drilled, and you will assemble them using 2”
stainless steel screws. Measure to make sure the frame is square
before driving the screws.
NOTE: Use a level to make sure your surface is flat before you
begin assembly. If you find that the selected spot is not perfectly
even, you may use shims to keep things level during assembly
and then remove them when the process is complete.
2. Position the WALL SUPPORT RAILS
Using 2” screws, draw the wall support rails together at the
corners through the pre-drilled holes.
Tip: Use the pre-drilled holes as pilot holes to drill a deeper hole.
This will help prevent the screws from stripping.
Place the 4 wall support rails with the groove facing up on top of
the assembled floor riser.
Tip: Drive the screws in partially, reverse screw, and then drive
them in all the way. This also helps keep the screws from
stripping.
Make sure the wall support rails are square with the floor risers
by measuring to make sure the edge is 1” all the way around.
3. Fasten WALL SUPPORT RAILS
Using 2” screws, attach the support rails to the floor riser; be sure
the groove is facing up. Use 4 screws for each rail.
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Note: Making sure the support frame is square is important for the proper assembly of the remainder
of the sauna. You want to make sure this setup phase is done correctly.

4. Position WALL SECTION A & B
Position Wall Section A so that it overlaps Wall Section B.
Note: Have someone available to help steady the panels
during assembly.
Wall Section A comes with pre-drilled holes. Use them to
connect Wall Section A to Wall Section B.
AB
5. Position WALL SECTION C
Wall Section B and Wall Section C will fit
together by way of their tongue-and-groove
profile — no screws required. Use mallet to
lightly tap panels into place.
B C
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6. Position WALL SECTION D
Position Wall Section D so that it overlaps
Wall Section C. Wall Section D comes with
pre-drilled holes. Use them to connect Wall
Section D to Wall Section C.
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7. Position WALL SECTION E
Wall Section E and Wall Section D fit
together by way of their tongue-and-groove
profile — no screws required.
CD
DE
8. Position WALL SECTION F
Wall Section F goes across from Wall Section
E. Connect Wall Section F to Wall Section A.
Wall Section F and Wall Section A will fit
together by way of their tongue-and-groove
profile — no screws required.
F A
9. Position UPPER LONG BENCH and
LOWER LONG BENCH (optional)
While the front is open and it’s easy to
maneuver, position the upper and lower long
benches. Do not fasten them in place yet.
(You may also choose to insert the benches
after the wall and roof sections have been
completely installed.)

11. Position WINDOW
SECTION H
Position Window Section H
beside Wall Section G. Wall
Section G comes with pre-drilled
holes. Use them to connect Wall
Section G to Window Section H.
10. Position WALL SECTION G
Connect Wall Section G to Wall Section
F. Wall Section G and Wall Section F will
fit together by way of their tongue-and-
groove profile — no screws required.
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G F
G
H
12. Position WALL
SECTION I
Connect Door Section I to
Window Section H. Door
Section I and Window Section
H will fit together by way of
their tongue-and-groove profile
— no screws required.
H
I
13. Position Window Section J
Window Section J connects to Wall
Section E by way of their tongue-and-
groove profile. Window Section J comes
with pre-drilled holes. Use them to
attach Window Section J to Door
Section I.
JEI

15. Position UPPER SIDE BENCH
Position the Upper Side Bench as shown. Use
the pre-drilled holes to fasten it to both the
Upper Long Bench and to the wall. Tip: Have
a helper on hand to hold Upper Side Bench in
place during installation.
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14. Install VERTICAL BENCH SUPPORT
to UPPER SIDE BENCH
Outside the sauna where there is room to
maneuver, attach the vertical brace board to
the Upper Side Bench using the pre-drilled
holes.
16. Attach UPPER LONG BENCH and LOWER LONG
BENCH
Use 2” screws to fasten the benches you positioned in step 9. Drive
screws through the pre-drilled holes located on top, on the side, and
on bottom of the benches to attach the benches firmly to the bench
supports and walls.
17. Attach Back Rest with Pre-Mounted LED Light
Measure the desired position at which you want to install the first back rest.
(Suggested: 8-12” above the bench and centered on the wall.) Use the pre-
drilled holes to attach the back rest to Wall Sections B and C.

20. Mount POWER SUPPLY
Use provided screws to position Power Supply where it is
most convenient for you on the outside of Wall Section C
or D (depending on where you drilled the hole.
Optional: Secure excess wire with zip tie or some other
fastener as desired.
19. Drill Hole for LIGHT CORD
The LED lighting comes installed on the back of the Long Back
Rest. Find the cord coming from the light switch and drill a
small hole in Wall Section C or D to insert the Light Cord
through so it comes through to the outside of the sauna.
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18. Attach Second Back Rest
Attach the second back rest on the same level as the back rest
with the pre-mounted LED light. Use the pre-drilled holes to
attach it to Wall Sections A and F.
21. Connect to POWER SUPPLY
Plug the Cord into the Power Supply. Plug the Power Supply
into any wall outlet, and flip the switch mounted on the back of
the bench to operate the LED light.

23. Attach ROOF SUPPORT over walls
Position the completed Roof Support over the wall sections.
Once in place on all 4 sides, use 2” screws to attach Roof
Support to wall sections. Use 3-4 evenly spaced screws per
rail.
NOTE: Tap the Roof Support firmly in place with a rubber
mallet so wall sections are fully inserted into the groove
before screwing into place.
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22. Build ROOF SUPPORT
Assemble 4 roof support rails by fastening with 2” screws
through the pre-drilled holes.
NOTE: Be sure that the rails are square and level and that the
screw head does not protrude into the groove.
24. Position ROOF SECTIONS
Place three Roof Sections on top of the Roof Support, nesting
the tongue of one section into the groove of the other.
Measure around perimeter before fastening to be sure distance
from edge is equal. Fasten roof sections to rails using pre-
drilled holes.
NOTE: Fasten edge of first section for positioning the last
two sections so that when you exert pressure to nest the
sections together, they won’t slide off the other side.

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25. Attach ROOF TRIM
Find the package of 2 Roof Trim pieces and attach on the
left and right sides of the sauna to cover the raw edges of
the Roof Sections.
NOTE: The trim pieces are not pre-drilled. You may install
using finish nails.
26. Attach VENT COVER
Screw the Vent Cover over the vents on Wall Section C using the
pre-drilled hole.
NOTE: Tighten only enough so vent cover will turn freely over
vents.
27. Mount the HEATER
Mount the heater as shown in the manufacturer's instructions and in the
supplemental Heater Installation Guide. The heater should be mounted on
Wall Section G, over the vents and 7” from the floor of the sauna. All the
necessary hardware is supplied with the heater.
Drill a hole below and behind the heater to run the wire and/or conduit
according to local electrical codes. The heater will be hard-wired according
to the specific wiring requirements for your heater.
Do not attempt to wire the heater yourself. Contact a licensed electrician in
accordance with your local electrical codes. Heater brand may vary
depending on where the sauna was purchased. Install sauna stones in
accordance with heater manufacturer instructions.
Typical wiring requirements for distances of up to 30 feet from the breaker box are as follows:
4.5kw-6.0kw heaters require 10-2 w/ground, copper wire only, and 30amp non-GFCI breaker.
8.0kw heater requires 8-2 w/ground, copper wire only, and 40amp non-GFCI breaker.

30. Attach the final piece — the
remaining pre-assembled portion.
29. Prop up the first pre-
assembled portion and attach
the two long horizontal
pieces. Make sure the
countersunk holes on the wall
mounting bracket face
inward.
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28. Your fence kit will arrive
banded with stretch wrap. It
consists of four pieces, shown
here.
31. DOOR HINGE ADJUSTMENT
The tension on the sauna door hinges has already been set, but you may adjust
it to make it either looser or tighter as the need arises. Look for the small hinge
box that is included with your sauna kit. It contains both the hex wrench and
set pins needed to adjust your door tension.
After the sauna is assembled, and with the door closed, take the hex wrench
and insert it in the top of the hinge. Once the wrench is fitted into the hex
opening, turn the hex wrench clockwise (toward the wood wall and away from
the glass) to tighten the hinge tension. Turn the hex wrench counterclockwise
(toward the glass and away from the wood wall) to loosen the hinge tension.
You will feel the tension adjust while you are tightening or loosening it. While
leaving the hex wrench inserted and the tension held in place, insert the set pin into the hinge as shown. Repeat the
process with the other hinge as each hinge must be tightened to the same degrees of tension.
Tip: The door should close gently on its own without slamming shut. Save the hex wrench for future adjustment.
32. Attach DOOR KNOB
Take the two sections of the door
knob and insert the thread through
the hole in the door. Tighten so that
handles are snug to glass.
NOTE: Hand tighten only and be
sure rubber gas-ket is between knob
and glass.

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OPERATION
After the sauna has been installed, sweep down the inside to remove any sawdust and wood shavings, and
then vacuum completely. Using a damp cloth and warm water, wipe down the entire sauna including the
benches to remove any remaining dirt, dust and debris. Rinse off the sauna stones and install them in or on
the heater in accordance with the heater manufacturer’s instructions. Improper placement of heater stones
can result in lower than desired heat temperatures. The first time you turn the heater on, set it to the
maximum setting and operate it for about 30 minutes with the door propped open. Then close the door and
allow your sauna to come up to the desired temperature.
Since you most likely will use your sauna as both a "wet sauna" and a "dry sauna", you should install the
sauna stones that have been included with the heater, following the manufacturer’s instructions. These
stones are necessary if water will be sprinkled on the heater to create the "wet sauna", and they will produce
more consistent heating in the dry mode (without the use of water). It is common for a stone to occasionally
crack during initial heating. If excess amounts of water are used during sauna, prop door open to let the
humidity escape. Not much water is necessary to achieve a “wet sauna”.
The amount of ventilation in the sauna can be adjusted by means of the vent located toward the top of the
sauna. It is important to have adequate fresh air flowing through the sauna, and this flow can be adjusted
with the movable vent cover.
TRADITIONAL STEPS IN TAKING A SAUNA BATH
STEP #1 - Set your heater so that the sauna room achieves the desired temperature, usually between 150º F
and 170º F. As a novice, you should begin at the lower end of this range and work your way up to the
higher temperatures over several sauna baths.
STEP #2 - Remove all clothing (except maybe your swimsuit), eyeglasses, contact lenses, jewelry, etc.
Take a quick shower with warm water and soap, or a quick dip in your hot tub.
STEP #3 - Enter the sauna initially for about 5 to 15 minutes. Bring a towel into the sauna onto which you
can sit or lay. Leave the sauna room once you have begun to perspire freely.
STEP #4 - Now you may take a cold plunge in your swimming pool, shower or snow bank. After that, relax
and cool down for another 10 to 20 minutes.
STEP #5 - Re-enter the sauna. On this return visit you may wish to sprinkle small amounts of water onto