HARVIA Vega Compact 3500 Sauna Heater with Built in Control Owner’s Manual

HARVIA Vega Compact 3500 Sauna Heater with Built-in Control

Sauna heater installation, wiring, operating instructions, troubleshooting, maintenance, and guarantee.

IMPORTANT!
This manual must be left with the owner, manager, or operator of the Sauna after it is used by the electrician!

Purpose of the electric heater
The KG-heaters are designed for the heating of large saunas to bathing temperature. It is forbidden to use the heater for any other purposes. Please read the user’s instructions carefully before using the heater.

NOTE!
These instructions for installation and use are intended for the owner or the person in charge of the sauna, as well as for the electrician in charge of the electrical installation of the heater.

INSTRUCTIONS FOR USE

Piling of the Sauna Stones
The sauna stones for an electric heater should be 2-4″ (4-8 cm) in diameter. The heater stones should be solid blocks of stone specially intended for use in the heater. Neither light, porous ceramic “stones” of the same size nor soft potstones should be used in the heater, because they may cause the resistance temperature to rise too high as a result of which the resistance may be broken.
Stone dust should be washed off before piling the stones. The stones should be piled into the stone compartment over the grating, between the heating elements (resistances) so that the stones support each other. The weight of the stones should not lie on the heating elements.

The stones should not be piled too tightly so that air can flow through the heater. See Fig. 1. The stones should be fitted loosely, and not wedged between the heating elements. Very small stones should not be put into the heater at all. The stones should completely cover the heating elements. However, they should not form a high pile on the elements.

The stones disintegrate with use. Therefore, they should be rearranged at least once a year or even more often if the sauna is in frequent use. At the same time, any pieces of stones should be removed from the bottom of the heater, and disintegrated stones should be replaced with new ones. The guarantee does not cover any faults caused by the use of stones not recommended by the plant. Neither does the guarantee cover any faults caused by disintegrated or too small stones blocking the heater ventilation. No such objects or devices should be placed inside the heater stone space or near the heater that could change the amount or direction of the air flowing through the heater, thus causing the resistance temperature to rise too high, which may set the wall surfaces on fire!

Heating of the Sauna

Before switching the heater on always check that there isn’t anything on top of the heater or inside the given safety distance. See item 1.6. “Warnings”. When the heater is switched on for the first time, both the heater and the stones emit a smell. To remove the smell, the sauna room needs to be efficiently ventilated. The purpose of the heater is to raise the temperature of the sauna room and the sauna stones to the required bathing temperature. If the heater output is suitable for the sauna room, it will take about an hour for a properly insulated sauna to reach that temperature. See item 2. “Sauna Room temperature for the sauna room is about 149-176 °F (65-80 °C).

The sauna stones normally reach the required bathing temperature at the same time as the sauna room. If the heater capacity is too big, the air in the sauna will heat very quickly, whereas the temperature of the stones may remain insufficient; consequently, the water thrown on the stones will run through. On the other hand, if the heater capacity is too low for the sauna room, the room will heat slowly and, by throwing water on the stones, the bather may try to raise the temperature of the sauna. However, the water will only cool down the stones quickly, and after a while the sauna will not be warm enough and the heater will not be able to provide enough heat. In order to make bathing enjoyable, the heater capacity should be carefully chosen to suit the size of the sauna room.

Control Unit of Heater
The KG model heaters require a separate control unit to operate the heater. The control unit should be located outside the sauna room in a dry place, at an altitude of approximately 5 ft (1500 mm). The temperature sensor, by means of which the set temperature is maintained in the sauna room, should be connected to the control unit. The temperature sensor and the overheating limiter are located in the sensor box installed above the heater. The sensor box should be installed in accordance with the installation instructions of the control unit model in question. The KG model heaters can be controlled with the Harvia Griffin control unit.

Harvia Griffin Control Unit
Control panel

• Temperature adjustment range 104-194 °F (40-90 °C).
• Pre-setting time adjustment range 0-12 h.
• Lighting control, max. power 100 W, 120 V 1 N~
• Fan control, max. power 100 W, 120 V 1 N ~
• Dimensions: 3. 7″ x 1. 1″ x 4.4″ (94 mm x 28 mm x 113 mm)

Power unit

• Supply voltage

• CG170-U1: 240 V 1 N~

• CG170-U1-15: 240 V 1N~ CG170-U3: 208 V 3N ~

• CG170-U3-15: 208 V 3N~
  Max. load

• CG170-U1: 10.5 kW/240 V 1 N ~ CG170-U1-15: 15 kW/240 V 1 N ~ CG170-U3: 10.5 kW/208 V 3N~ CG170-U3-15: 15 kW/208 V 3N ~

• Dimensions: 10.6″ x 3.1″ x 11″

• (270 mm x 80 mm x 280 mm)

Sensor

• Temperature sensor NTC thermistor 22 kQ/T=77 °F (25 °C)
• Resettable overheating limiter
• Dimensions: 2.0″ x 2.9″ x 1.1″
• (51 mm x 73 mm x 27 mm)
• Weight 175 g with leads, ca 13 ft (4 m)

Harvie Xenio Control Unit Control panel

•  Pre-setting time adjustment range 0-12 h.
• Lighting control, max. power 100 W, 120 V 1 N~
• Fan control, max. power 100 W, 120 V 1 N ~
• Dimensions: 3.4″ x 1.0″ x 4.4″ (85 mm x 24 mm x 110 mm)

Power unit

• Supply voltage
• ex 1 70-U 1: 240 V 1 N ~
• CX170-U1-15: 240 V 1 N ~
• CX170-U3: 208 V 3N ~
• CX170-U3-15: 208 V 3N~
• CX30-U1-U3: 240 / 208 V 1N~/ 3N~ CX45-U 1-U3: 240 / 208V 1 N ~ / 3N ~
• Max. load
• CX170-U1: 12.5 kW/7 kW (Two supply wires I One supply wire between the Heater and the Power unit.) /240V 1 N ~
• CX170-U1-15: 15 kW/10.5 kW (Two supply wires / One supply wire between the Heater and the Power unit.) /240V 1 N ~
• CX170-U3: 10.5 kW/208V 3N~
• CX170-U3-15: 15 kW/208V 3N ~
• CX30-U1: 7 kW / 11 kW (Two separated electric circuits) 240 V 1 N ~
• CX45-U 1: 10, 8 kW / 1 7 kW (Two separated electric circuits) 240 V 1 N ~
• CX30-U3: 10.5 kW / 208V 3N ~
• CX45-U3: 15 kW / 208V 3N ~
• Dimensions: 10.6″ x 3.0″ x 10.6″
• (270 mm x 75 mm x 270 mm)

Sensor

• Temperature sensor NTC thermistor 22 kO/T=77 °F (25 °C)
• Resettable overheat protector
• Dimensions: 2.0″ x 2.9″ x 1 .1″ (51 mm x 73 mm x 27 mm)
• Weight 175 g with leads, ca 13 ft (4 m)

Throwing Water on Heated Stones
The air in the sauna room becomes dry when warmed up. Therefore, it is necessary to throw water on the heated stones to reach a suitable level of humidity in the sauna. The humidity of the air in the sauna room is controlled by the amount of water thrown on the stones. A correct level of humidity makes the bather’s skin sweat and makes breathing easy. By throwing water on the stones with a small ladle, the bather should feel the effect of air humidity on his skin.

Both too high a temperature and air humidity will give an unpleasant feeling. Staying in the hot sauna for long periods of time makes the body temperature rise, which may be dangerous. The maximum volume of the ladle is 0.2 liters. The amount of water thrown on the stones at a time should not exceed 0.2 I, because if an excessive amount of water is poured on the stones, only boiling hot water on the bathers. Never throw water on the stones when there are people near the heater, because hot steam may burn their skin.

Sauna Water
The water to be thrown on the heated stones should meet the requirements of clean household water. The factors essentially affecting the quality of water include the following:

• humus content (color, taste, precipitates); recommended content less than 1 2 mg/I.
• iron content (color, smell, taste, precipitates); recommended content less than 0.2 mg/I.
• hardness – the most important substances are manganese (Mn) and calcium (Ca);
• recommended content of manganese 0.05 mg/I, calcium less than 1 00 mg/I.

Calcareous water leaves a white, sticky layer on the stones and metal surfaces of the heater. Calcification of the stones deteriorates the heating properties. Ferrous water leaves a rusty layer on the surface of the heater and elements and causes corrosion. The use of humous, chlorinated water and seawater is forbidden. Only special perfumes designed for sauna water may be used. Follow the instructions given on the package.

Temperature and Humidity of the Sauna Room Both thermometers and hygrometers suitable for use in a sauna are available. As the effect of steam on people varies, it is impossible to give an exact, universally applicable bathing temperature or percentage of moisture. The bather’s own comfort is the best guide. The sauna room should be equipped with proper ventilation to guarantee that the air is rich in oxygen and easy to breathe. Bathing in a sauna is considered a refreshing experience and good for the health. Bathing cleans and warms your body, relaxes the muscles, and soothes and alleviates oppression. As a quiet place, the sauna offers the opportunity to meditate.

Instructions for Bathing

•  Begin by washing yourself.
• Stay in the sauna for as long as you feel comfortable.
• According to established sauna conventions, you must not disturb other bathers by speaking in a loud voice.
• Do not force other bathers from the sauna by throwing excessive amounts of water on the stones.
• Forget all your troubles and relax.
• Cool your skin down as necessary.
• If you are in good health, you can have a swim if a swimming place or pool is available.
• Wash yourself properly after bathing. Have a drink of fresh water or a soft drink to bring your fluid balance back to normal.
• Rest for a while and let your pulse go back to normal before dressing.

Warnings

• Sea air and a humid climate may corrode the metal surfaces of the heater.
• Keep away from the heater when it is hot. The stones and outer surface of the heater may burn your skin.
• Do not throw too much water on the stones. The evaporating water is boiling hot.
• Do not let young, handicapped, or ill people bathe in the sauna on their own.
• Consult your doctor about any health-related limitations to bathing.
• Parents should keep children away from the hot heater.
• Consult your child welfare clinic about taking little babies to the sauna.
• age?
• the temperature of the sauna?
• time spent in the warm sauna?
• Be very careful when moving in the sauna, as the platform and floors may be slippery.
• Do not smoke, use alcohol, or exercise in the sauna!
• Do not exceed 30 minutes in the sauna at one time, as excessive exposure can be harmful to health. The sauna should not be used as an endurance test!
• Persons with poor health should consult their physicians before using the sauna!
• Do not place any combustible material over the sauna Heater (towels, bathing suits, wooden bucket or dipper)!
• Use only clean tap water on the stones – do not use pool or spa water, as chlorine gas can be produced and the heating elements can be damaged!
• Hyperthermia occurs when the internal temperature of the body reaches a level several degrees above the normal body temperature of 98.6 °F.
• The symptoms of hyperthermia include an increase in the internal temperature of the body, dizziness, lethargy, drowsiness, and fainting.

The effects of hyperthermia include

• Failure to perceive heat
• Failure to recognize the need to exit the room.
• Unawareness of impending hazard
• Fetal damage in pregnant women
• Physical inability to exit the room
• Unconsciousness
  WARNING – the use of alcohol, drugs, or medication is capable of greatly increasing the risk of fatal hyperthermia.

Troubleshooting

If the heater does not heat, check the following points:

• The current from the control unit to the heater has been switched on.
• The desired temperature programmed in the control panel is higher than the temperature of the sauna.
• The breaker is switched on. Also, the breaker should be the correct size.

SAUNA ROOM CONSTRUCTION GENERAL INFORMATION

• Framing
  2″ x 4″ (50-100 mm) any suitable wood material, 16″ (406 mm) o.c.

• Ceiling height
  No higher than 7’0″ (2100 mm).

• Insulation
  R11 Fiberglas with foil back in walls and ceiling, foil facing into room.

• Drywall
  See local codes. Is not required in most residences. See local codes for commercial. If drywall is used, apply 1″ x 2″ (25 x 50 mm) nailers so that wall and ceiling boards can be attached to solid wood.

• Paneling
  Use kiln-dried, clear, T & G softwood such as California Redwood, Western Red Cedar, Alaska Yellow Cedar, pine, spruce, or other suitable wood material (with moisture content not exceeding 11 %).

• Benches
  Use matching wood of vertical grain. Fasten from the bottom to prevent the burning of bathers. A heater fence is necessary for safety and should be constructed of softwood to match the sauna interior. See Figures 2-4 for clearances from the sauna heater. The fence should attach to the wall and should not be placed higher than the top of the heater below the rock line.

• Door
  Must open out and should not have a lock.

• Flooring
  Concrete, ceramic tile, or heavy-duty Vinyl.

• Ventilation
  Should be provided by a lower vent close to the heater, 4″ (100 mm) from the floor, and an upper vent on the opposite wall (if possible) 6″ (150 mm) from the ceiling or as low as 24″ (600 mm) from the floor. Vents should be adjustable and should allow air to change 5 times per hour. Sauna shall be provided with intended ventilation as required per the local code authorities.

• Light
  Should be a vapor-proof, wall-mounted type, with a rough-in box mounted flush with inside paneling. It should be mounted 6″ (150 mm) from the floor, not directly over the sauna heater, and not over upper benches; the light bulb should not exceed 75 watts.

• Accessories
  Bucket, dipper, and thermometer are essential. A thermometer should be placed over the sauna heater, 6″ (150 mm) from the ceiling, for the correct temperature reading. Other accessories such as a hygrometer, sand timer, brushes, etc. are available. Le Maintenance instructions – are included at the end of this manual.

• Warning signs
  are furnished with a sauna heater. The metal The “CAUTION” sign should be fastened to the wall, close to the heater, in a visible place.

INSTRUCTIONS FOR installation

Prior to Installation

• Prior to installing the heater, study the instructions for installation, as well as checking the following points:
• Is the output and type of the heater suitable for the sauna room?
• The cubic volumes given in Table 1 should be followed.
• Are there a sufficient number of high-quality sauna stones?
• Is the supply voltage suitable for the heater?
• The location of the heater fulfills the minimum requirements concerning safety distances given in Figures 2-6 and Table 1.

It is absolutely necessary to ensure that the installation is carried out according to these values. Neglecting them can cause a risk of fire.

• Only one electrical heater may be installed in the sauna room. Multiple heaters can be installed and used in the sauna room only if they share the same control unit (Griffin Multidrive).
• The heater should be installed so that the warning texts on the cover of the junction box

Note! The control panel and power unit must be installed in a WIRE TO ROOM LIGHT #14 AWG 90 °C FIL DE RACCORDEMENT A L’ECLAIRAGE DE LA CABINE #14 AWG 90 °C dry place; away from a spa, pool, or shower; not outdoors. A receptacle shall not be installed inside the sauna room. The load center shall be supplied by the electrical contractor during field wiring and shall be 2 poles 2 breakers, and a subpanel model. The load center can be located in other serviceable places, as well as the location shown on this diagram.

THE SAUNA ROOM SHALL BE PROVIDED WITH PROPER VENTILATION MINIMUM CLEARANCES, MIN-MAX SPACE, ADEQUATE VENTILATION

Installation of Control Unit and Sensor Detailed instructions for the installation of both the unit and the sensor are delivered with the control unit.

Installation of Heater
The heater may only be connected to the electrical network in accordance with the current regulations by an authorized, professional electrician. The wiring diagrams are included in the control unit’s installation instructions. Further instructions concerning exceptional instal­lations can be obtained from local electrical authori­ties.

1. Remove the heater from the carton and place it in the proper location in the sauna room. Observe proper clearances as per Figures 2-6 and Table 1. After the final hookup, the electrical contractor should secure the heater to the floor with at least two screws or bolts.

2. See the applicable wiring diagram for the heater model (figures 8-9, see the control unit manual for detailed instructions on how to connect the heater and the control unit). The heater must
   be permanently installed (no pigtails or plugs allowed) and wiring must be done by a licensed electrician, who must follow the wiring diagram provided and adhere to local codes. Use proper A.W.G. rated wire size and use copper wire suitable for 194 °F (90 °C) within sauna walls. Use grounding terminals provided in the sauna heater and control unit to properly ground the equipment as per NEC and local codes.

3. Inside the heater box, there are two signs. Please place the metal “CAUTION” sign on the interior wall of the sauna room directly above the heater in a visible place. Place the metal
   “WARNING” sign outside, on the door of the sauna room. “MAINTENANCE INSTRUCTIONS” are at the end of this manual.

Table 1.

Single Phase Heater Wiring and Hookup
(K10G-U1, K12.5G-U1, K15G-U1, K10G-U1W,
K 12. 5G-U 1 W, K 1 5G-U 1 W)

Refer to Table 2 for proper wire size and amperage. See Figures 2-6 for required clearances. Use copper wire from the breaker to the wall-mounted power unit. Supply cable must have 5 wires including insulated neutral and separate ground. Use 194 °F (90 °C) copper wire from the power unit to room light. Also, use 194 °F (90 °C) copper wire from the power unit to the sauna heater (within seal-tight flex conduit), and connect to the junction box under the heater at the back, with a 194 °F (90 °C) connector. Cutler-Hammer model CH4F load center shall be supplied by the electrical contractor. If the connection to the heater will be made at a later time, bring flex into sauna room 4-6″ ( 100-150 mm) from the floor, and leave 3′ (1200 mm) of flex for hookup (can be cut to right length later). Before testing the heater, fill the rock cavity with igneous stones provided by the heater and fasten the metal protective grill on top of the heater. (See gen. info concerning washing and placing of stones.)

3-phase Heater Wiring and Hookup
(K10G-U3, K12.5G-U3, K15G-U3, K10G-U3W, K12.5G-U3W, K15G-U3WI
Refer to Table 2 for proper wire size and amperage. See Figures 2-6 for required clearances. Use copper wire from the breaker to the wall-mounted power unit. Supply cable must have 4 wires including insulated neutral and separate ground. Use 194 °F (90 °C) copper wire from the power unit to room light. Also use 194 °F (90 °C) copper wire from the power unit to sauna heater (within seal-tight flex conduit), and connect to the junction box under the heater at the back, with a 194 °F (90 °C) connector. If the connection to the heater will be made at a later time, bring flex into sauna room 4-6″ ( 100-150 mm) from floor, and leave 3′ (1200 mm) of flex for hookup (can be cut to right length later). Before testing the heater, fill the rock cavity with igneous stones provided by the heater and fasten the metal protective grill on top of the heater. (See gen. info concerning washing and placing of stones.)

Table 2.

Figure 8. Electrical connections of 240 V 1-phase heaters (K10G-U1, K12.5G-U1, K15G-U1J

Figure 10. Electrical connections of 240 V 1-phase heaters without contactors (K10G-U1W,  K12.5G-U1W, K15G-U1WJ

After Installation

1. After the sauna heater has been properly wired, according to the appropriate wiring diagram and local codes, turn the sauna breaker on in the main breaker panel. (Note! Electrician must label
   “Sauna” breaker.)

2. Turn the thermostatic (heat) control to on position (this is located either on your heater or on your remote wall control. If you have a wall control, the indicator light will come on to show that the sauna is heating). Set a timer to 10 or 15 minutes.

3. Within 5 minutes, you should be able to feel heat from heater elements when holding your hand over heater.

4. If the sauna does not heat, refer to trouble­shooting information.

5. It is normal for smoke to appear during the first heating, as the protective element coating needs to burn off. Turn sauna on for 1 hour before using the first time, to eliminate smoking.

Troubleshooting
If the sauna heater does not operate after initial installation and wiring:

1. Check circuit breaker in contactor to be sure that it has not been shorted out.
2. Make sure that the current from the control unit to the heater has been switched on.
3. Check that the desired temperature programmed in the control panel is higher than the temperature of the sauna.

If the sauna has been in operation, but the heater ceases to operate:

1. Check breaker to make sure it is on.
2. Check that there is on time left in the control panel.
3. Check overheat limiter reset button in heater (reset is under the heater) to see if it has been released.
4. Call your electrician or service person for further help.

NOTE! A GROUND FAULT INTERRUPTER (GFI) should not be installed in and does not belong in a sauna. If used, the breaker will trip, and damage could result.
If the sauna heater operates, but the sauna room does not come up to sauna temperature 160-185 Of (70-85 °C)

1. You must allow at least 30 minutes for sauna heat-up time.

2. Is Sauna thermometer located 6″ (150 mm) from ceiling, and is it above or close to Sauna heater? (This is proper location for Sauna temperature reading.) Thermometer readings vary with room heights and location. Eg. 180 °f (82 °C) above Sauna heater = 165 °F (74 °C) on opposite wall = 140 °F (60 °C) on upper bench level = 120 °F (49 °C) on lower bench level = 100 °F (38 °C) at floor level.

3. Check for proper wire size, amp size, and proper wiring (according to diagrams and information) also necessary copper wiring.

4. Check the placement of stones to make sure they are loosely spaced around elements,
   to insure good air flow. Stones packed too tightly will restrict air flow and reduce heating capacity.

5. Check for heat loss (around or under door, around ceiling light or fan – we do not recommend ceiling light and a fan does not belong in the sauna.

6.  Is the room properly insulated?

7. Is the ceiling higher than 7′ (2100 mm)?

8. After checking all the above, remove rocks and check the heating elements for holes or burned areas. (Only if heater has been in use for some time.)

Caution! Electrician or service person!

1. BEFORE SERVICING HEATER, CONTROL, OR CONT ACTOR, TURN POWER OFF AT BREAKER!
2. Open junction box to make sure wires are tightly secured with no loose connections. Heater wire and all connecting wires should be copper.
3. Check for burned spots or short in wiring of timer or thermostat. Sauna heater’s warranty on parts is void if installer/electrician fails to follow necessary wiring information provided or fails to follow code for proper wire size, amperage, etc.

Overheating Limiter
Each heater is equipped with an overheating limiter which is a safety device. If an abnormal heating condition should occur, the heater will automatically shut off, and it will not come on again until it cools.
To reset the overheating limiter, locate the reset button (bottom front on wall models, behind junction box at back bottom of floor-mounted heaters) and push upward until contactor kicks in. If the reset button continues to trip, contact a qualified service person. Be sure that a GFI has not been installed.

SPARE PARTS

• PIECES DE RECHANGE
• SAUNA HEATERS/POELES DE SAUNA K10G-U1, K12.5G-U1, K15G-U1 K10G-U3, K12.5G-U3, K15G-U3 K10G-U1W, K12.5G-U1W, K15G-U1W K10G-U3W, K12.5G-U3W, K15G-U3W

We recommend to use only the manufacturer’s spare parts.

GUARANTEE

The manufacturer gives a one year guarantee for this heater. The guarantee starts from the date of purchase and includes all the parts of the heater (heating elements, controls, contactors, etc.).
The guarantee covers faults from the manufacture and material only. The guarantee includes a supply of spare parts by the manufacturer or importer after the faulty parts have been returned. Replacing any parts in the heater does not extend the original guarantee period of one year.

The guarantee does not cover defects caused by normal wear and tear, defects caused by improper installation, poor maintenance or failure to follow the manufacturer’s instructions for installation, use and care, or alterations made to the product. The guarantee is void if the heater is used improperly. The guarantee does not cover delivery costs of the faulty part or repair costs on the field. If the heater is returned to the manufacturer or importer within five years from the date of purchase, the importer will provide free repair work, but may charge for spare parts if the one-year guarantee has expired.

The guarantee is void if installation and wiring has not been carried out by certified electrician or authorized and qualified service representative. Please not that the installer’s signature is needed below.
The guarantee is void if the information below is not filled out and returned to the manufacturer or importer within 1 to 5 days of purchase. The guarantee applies only to the first installation of the product and to the original purchaser.

MAINTENANCE INSTRUCTIONS

1. Use only clean water on sauna stones. Do not use spa or pool water as it will destroy your heater.
2. Clean water should always be used in sauna buckets and water should be dumped out after every use. Scour buckets and dippers occa­sionally when film collects from usage. Use a plastic bucket liner in the bucket to prevent water leakage.
3. Scrub benches with a soft brush, using soap and water or a mild disinfectant, when needed – about once a week in commercial saunas, or depending upon sauna usage. For sanita­tion, each bather should sit or lie on a towel (this will prolong bench life).
4. Remove possible removable flooring and wash the proof floor with disinfectant (e.g. Pine-in) about once a week or as often as needed. Hose off removable flooring to clean.
5. To maintain a beautiful appearance of appear thoracicna heater, remove water stains by wiping with a damp cloth occasionally.
6. Our heaters require no special maintenance when properly installed by a qualified elec­trical contractor. After 1-2 years of usage, the rocks may need replacing if they have crumbled or powdered (depending upon sauna usage).
7. We strongly recommend a floor that can be easily cleaned (concrete, ceramic tile, or a poured type of flooring). When this is pro­vided, the sauna can be easily cleaned and kept in a sanitary condition with little effort. A carpet is NOT recommended for a sauna! A carpet becomes a perfect breeding ground for bacteria in the moist conditions of a sauna, and a carpet promotes the spread of foot diseases such as athlete’s foot. For the same reasons, wooden duckboard should not be used for flooring.
8. In new construction, a floor drain should also be provided, especially in commercial saunas for sanitary cleaning and maintenance.
9. Seal wood around the glass in door-insidthe e and outdoor-in the side out withter Seal with o prevent warpage.
10. When sauna wood becomes stained from per­spiration, the wood may be lightly sanded with fine sandpaper to restore a beautiful appearance. We do not recommend stains or sealers as toxic vapors may appear when heated. However, 2 coHoweverhompson’s Water Seal may be used on the wood benches in a commercial sauna, so that the wood may be more easily cleaned and kept sanitary – the wood will not absorb perspiration.
11. The sauna room will heat faster if the higher vent is kept in a closed position when heating. The lower vent may always be kept in an open position.
12. Required warning signs should be posted according should be prescribedording.

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