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' Sigmar: Test Baatmagasinet Marine Boiler Test /comparison'




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TEST water heaters in the 20litre class
Wet heat home comfort on board
This test of Water Heaters for Yachts has There are wide differences bet
been carried out by the Boating Magazine ween water heaters In the the leading motor one the temperature of the hot
boat magazine in Scandinavia The
article is written and photographed by water fell by only 39 degrees
Jan Harry Svendsen and reported in over 12 hours of cooling
issue nr 7 of 2004 This article is reprinted The worst of them lost more than
without any changes or comments by
Indel Marine Italy producer of Isotemp
20 degrees and cost the most
Water Heaters The translation language to English has
been made by authorised Member of of Professional water heaters in the 20litre class
he difference between a warm pleas COOLANT AS HEAT SOURCE drawback of this solution is that the tank is
ant shower and a cold shower that Most of the water heaters in the test have heavy It weighs as much as 23 kilograms
makes you shiver is no more than 135 the same basic design idea An insulated tank
degrees an hour While the Isotemp Basic has is connected to the boats freshwater system ISOTEMP GOOD
a heat loss of only 033 degrees an hour over and the engine cooling system The engine WEBASTO hours the Sigmar Thermoinox loses as
coolant is conveyed through a heat exchang The ATI BB 2212 had the highest tem
much as 168 degrees However the Sigmar er inside the tank and heats up the water perature after one hour of heating using the
is not the overall loser in the test It redeems Most of the tanks are additionally supplied heat exchanger 688 degrees Thats more
itself by having a slightly higher tempera with a heating element which makes it possi than 20 degrees warmer than the after the heating
cycle has ended than ble to heat up water from the shore power MWH020 and the QL WaterHeater with
the Webasto which does not manage to sup supply 482 and 485 degrees respectively The pic
ply a drop of water over 40 degrees after a Vetus has chosen a different solution ture changes when we have left the water
cooling period of 12 hours with two tanks one inside the other The heaters standing for twelve hours without
freshwater is in the inner tank while the en heating Then the Vetus provides the hottest
gine coolant circulates in the outer tank The water at 552 degrees while the Webasto
TO ENSURE THAT the test results were repeatable and that the tanks operated in they were tested on the bench Here the tank of the Vetus is does not
manage to supply water a valve it is possible to choose to add cold
warmer than 399 degrees The limit for a water to the hot water drained from shower temperature is around heater Better use is made of
the hot water
40 degrees in this way
What is of greatest interest however is Another advantage is that using this
how many litres of water over 40 degrees valve it is possible to adjust how hot water
the heaters manage to supply after 12 hours the heater is to deliver This reduces the dan
of cooling ger of burns particularly if there are young
Here the Isotemp Basic is in a class of its children on board
own From its 24 litre tank it supplies as
much as 23 litres of water at a temperature CHECK OUTPUT
above 40 degrees The Vetus is also good All the water heaters in the test with the
THE TANKS were taken apart so that we
with 17 litres from a 20 litre tank The exception of the Vetus were equipped with a could study their Slim 20 and Quick Nautic Boiler
heating element as standard Connecting the
deliver 15 litres The Sigmar Thermionox hotwater tank to the boats shore power sys
and the ATI BB 2212 are tem ensures that there is also hot water when SAFETY THERMOSTAT FAILED
with nine and eight litres respectively Both the boat is moored With a builtin thermostat All the heating elements are equipped with a
have a capacity of 22 litres By far the worst the efficiency of the hotwater tank is like at thermostat and in the vast majority of cases
is the Webasto It does not manage to deliv home Most of the tanks in the test have heat these are adjustable The exception is the
er so much as a drop of water above 40 de ing elements that deliver around 800 Watts Isotemp which has a thermostat fixed at 75
grees after 12 hours The exception is the ATI which has a 1500 degrees For the water heaters from Sigmar
Watt element It is basically a good one but Mobitherm QL and Webasto the temperature
MIXER VALVE IS USEFUL the drawback is that most shore power sys was a few degrees above the value at which
Part of the secret behind the good re tems have many users connected to the same the thermostat was set while the rest of the
sults achieved by the Isotemp is the mixer outlet Too high a wattage in the element may tanks were a few degrees below the set tem
valve Both the Isotemp Slim 20 and the therefore lead to the fuse in the shore power Basic have this as standard Using system
blowing All the thermostats are DRAIN The tank of the Vetus
is drained SMALL SLEEVE COUPLING The tank is drained
by unscrewing a plastic lid This solution via the small sleeve coupling Not only does this
will result in wastewater when the tank take a long time it is also difficult to attach a hose
has to be drained to the sleeve THERMOSTAT The Isotemp is
the only water heater in the test with a
safety thermostat that works on boiling
dry The blue box is the safety ther
mostat while the operating thermostat THERMOSTAT All the water heaters in MIXER VALVE The tanks from Isotemp have a mi
is the white box the test with the exception of the xer valve as standard The temperature of the wa
Isotemp have an adjustable thermostat ter to be supplied by the heater is set here Cold
However the safety thermostat failed on water is mixed in with the hot water to attain the
all the thermostats correct with a safety thermostat This is in six bar The deviations between specified and
heavy Vetus charge no less than NOK
tended to trip if the water heater is switched on opening pressure and actual opening pres 3855 for their tank and if you want a heating
and there is no water in the tank boiling dry sure were minimal for these tanks element the price rises to NOK 4617 The
or if the ordinary operating thermostat fails Quick Nautic Boiler offers a lot for the mon
Only the Isotemp had a system that worked the SAME MAKE ey With a guide price of NOK 2350 it is the
way it was meant to After just under five min We have brought together nine different most inexpensive tank in the test The 20litre
utes the safety thermostat tripped on both the tanks in this test But four of these tanks are tank nevertheless delivers 15 litres of hot wa
Slim 20 and Basic The element in the Vetus of the same make Sigmar has produced the ter and in material selection it is superior to
and ATI and blew the fuse on tanks for Mobitherm QL and Webasto the other tanks in the test Stainless steel
the shore power side On the other water However there are some differences be AISI 316 is used in the tank heating coil
heaters the operating thermostat took over the tween the tanks The Thermionox has a tank and in the casing around the tank Despite
job of the safety thermostat and switched on capacity of 22 litres while the Webasto QL low price good performance and quality ma
and off with an empty tank and Mobitherm have 20litre tanks terials the tank of the Quick comes third be
Webasto for its part has its own heat ex cause the safety thermostat did not trip in the
POOR CONNECTING OPTIONS changer for the connection of external heat boilingdry test The Quick is therefore beat
A combined oneway valve and safety for example a Webasto heater en by the Isotemp Slim 20 Its performance is
valve is fitted on all the tanks This valve The QL and Mobitherm on the other the same as that of the Quick with regard to
has several functions including preventing hand are completely identical tanks which hot water but the Slim 20 has a mixer ther
hot water from running out of the tank In our test results also show to be the case mostat as standard and has a safety the valve
is used when the water They track each other with regard to both stat that works The drawback is the price
heater is to be drained The drawback with the number of litres above 40 degrees the The Isotemp costs nearly NOK 1000 more
most of the valves is that the diameter of the tank can deliver and the temperature after than the Quick
drain coupling is too small This makes it heating has ended The heat loss is also Modest performance and a high to attach a
hose to the valve and at identical for the two tanks It might be should make the tanks from both QL and
the same time it takes too long to drain the thought that identical tanks would cost the Mobitherm The Isotemp
tank A welcome exception is the Vetus same They do not The QL costs NOK Slim 20 for example is cheaper to buy than
which has a valve with a decent connection 3125 while the Mobitherm carries a price the Mobitherm MWH20
for a hose on the safety valve The draw tag of NOK 3750 Mobitherm thus charges Both the Sigmar Thermoinox and the
back with the Vetus solution is that they NOK 600 more than QL for exactly the ATI BB2212 have a capacity of 22 litres
have chosen to have a separate unit to drain same tank 1 85 NOK However they do not manage to deliver
the tank This is done by unscrewing a more than nine and eight litres of water re
small plastic lid This solution is not ideal ISOTEMP BEST spectively at a temperature above
and will cause wastewater in the boat This test provides ample proof that expensive 40 degrees The only tank worse than these
All the tanks with the exception of the is not always best The Webasto 20 L is the is the Webasto 20 L which does not pro
Isotemp and Quick have safety valves that most expensive and worst tank in the test vide a drop of water warmer than
open at a pressure of four bar The manufac The Isotemp Basic is the best With its tank 40 degrees The price is also very high so
turers information was in good agreement capacity of 24 litres it delivers 23 litres of you need to have a very good reason to
with our test results during our pressure water at a temperature above 40 degrees after choose the Webasto tank
test However it is poor when the ATI and a cooling period of 12 hours The Basic costs
Webasto valves already start to ooze at NOK 3350 but a mixer valve comes as stan
three bar dard Vetus is also a tank with good perfor
Both the Isotemp and the Quick have mance No less than 17 litres from its that do not open until a pressure of tank is good
but the tank is both expensive
Isotemp Basic 24 Price NOK 3350 inn
The ISOTEMP BASIC has good la
belling to
CONCLUSION er
The Isotemp Basic is the
show winner in the test It supplies
where the
various a lot of hot water in relation to
hoses are its size and has low heat loss
to be con The water heater is well put
nected together in all its details and
has a high level of equipment
A mixer valve for example is
Isotemp Basic has a tank capa acidproof steel AISI 316 A casing THE CONSTRUCTION makes no temperature at 558 degrees
This is
city of 24 litres It can be mounted ho made of nonmagnetic stainless steel compromises The heat exchanger relatively modest when
the and vertically but in that AISI 304 protects the tanks insulati goes in several loops and the hea ture of the water that
circulated
ting element is angled with the connection points fa on The insulation is of polyurethane for optimum output
through the heat exchanger had a
cing down The water heater has very foam temperature of
strong feet that are spotwelded to a The thermostat of the heating ele The Isotemp Basic has low heat 70 degrees However
the capacity of
strap that goes round the tank Mixer ment is not adjustable but is pro loss After 12 hours the total heat loss the water heater is
impressive and heating element are grammed to trip at 75 degrees The was only 39 degrees That gives an 12 hours of cooling
the tank safety thermostat works as intended average heat loss per hour of only as much as 23
litres of water at a
Both the tank and the heat ex on boiling dry and trips quickly It has 033 degrees After one hour of engi temperature above 40 are
made of highgrade to be reset manually ne running we measured the water
CONCLUSION
The Isotemp Slim 20 is a good
Isotemp Slim 20 Price NOK 3265
hotwater tank Its modest di
mensions mean that it also
CONNECTION is fits into tight spaces
thanks to good labelling of the va The water heater has a high
rious con level of equipment and has
nection
useful capacity
points
THE CONSTRUCTION of the
Slim 20 L is identical to the
Basic Here too the heating ele
ment is angled down but be
cause the tank is smaller the
heating coil has fewer loops
The Isotemp Slim 20 has a tank ca Both the tank and heat exchanger on boiling dry and trips quickly It capacity of the water
heater is ap
pacity of 20 litres It can be mounted are made of highquality acidproof has to be reset manually proved After 12 hours
of and vertically but in that steel AISI 316 A casing protects The Isotemp Slim 20 has an ave the tank delivers 15 litres of
water at
case with the connection points fa the insulation The insulation is of rage heat loss after 12 hours the to a temperature above 40
degrees
cing down The water heater has polyurethane foam tal heat loss was 121 degrees It
strong feet that are spotwelded to a The thermostat of the heating ele provides an average heat loss of
strap that goes round the tank Mixer ment is not adjustable but is pro one degree per hour After and heating element are grammed
to trip at 75 degrees The for one hour we measured the safety thermostat works as intended
temperature at 627 degrees The
CONCLUSION
The Quick Nautic Boiler is a
good hotwater tank
Quick Nautic Boiler Price NOK 2350
The tank is reasonably pri
ced but is costly in choice
of material It has useful ca
pacity and an efficient heat
exchanger A disappoint
ment is the safety thermos
tat which does not work as
intended
THE HEATING COIL is strong
and well dimensioned The wa
ter heater ought to have had
rather better Quick Nautic Boiler has a tank The QUICK has a clear front with good The safety thermostat is integrated The
Quick Nautic Boiler has of 20 litres and can be labelling The fact that the text is cast into the thermostat housing which sits vely
high heat loss after 12 hours the
mounted horizontally and vertically into the plate means that problems on the outside the tank This works po total heat loss was
156 degrees This
with gluedon slips are avoided
The water heater has simple feet orly because the sensor is too far gives an average
heat loss per hour of
welded to a strap that goes round the of steel AISI 316 protects the tan away from the heating element 13 degrees After one
hour of engine
tank Heating element is standard ks insulation which is made of poly During our test the water heater knoc running we measured the
water urethane foam ked against the operating thermostat perature at 643 degrees
The capaci
Both the tank and the heat ex The thermostat of the heating ele on boiling dry In other words the safe ty of the water heater is
are made of acidproof steel ment is adjustable in the ty thermostat did not work as inten After 12 hours of cooling the
tank deli
AISI 316 A casing also of acidpro 2080 degree range ded vers 15 litres of water at a
temperature
above 40 degrees
Vetus WH20A
THE LABELLING of the connecti
Price NOK 3855
CONCLUSION
Vetus supplies a tank with
solid performance Its capa
city is very good and it has
on points is useful However the
distinctive low heat loss However the
design of tank is too expensive with
the tank an electric heating element it
makes costs NOK 4617 Its design
correct also makes the tank heavy
fitting
very im
portant
DOUBLE The Vetus has an
inner and an outer tank with
the engine coolant Vetus has a tank capacity of outer tank in which the engine coo in safety thermostat is intended to in the
outer tank Its design
20 litres and can be mounted hori lant circulates The inner tank is protect against boiling dry but the makes the tank and
vertically The water he made of nonmagnetic stainless steel element before the
ater has strong feet screwed into the AISI 304 The outer tank is made of thermostat tripped perature at 63 degrees The
capacity
tank itself A heating element is not steel The design of the tank makes it The Vetus has a low water loss af of the water heater is very
good despite the high price of very heavy The insulation is poly ter twelve hours the total water loss 12 hours of cooling the tank
delivers
the water heater urethane foam with a casing of vinyl was 78 degrees This results in an 17 litres of water at a
temperature
The design of the Vetus differs ra but there is polystyrene at each end average water loss per hour of above 40 from the other tanks
in the The heating element is adjustable 065 degrees After an hour of engine
test There is an inner tank and an in the 40 to 80 degree range A built running we measured the water tem
QL Water Heater Price NOK 3125 CONCLUSION
The QL Water Heater is a
THE CONNECTION POINTS are simple hotwater tank The
usefully la
belled heating loop is Ushaped
The insu and therefore makes poor
lation is use of the coolant Only
unprotec 12 litres of hot water above
ted 40 degrees is also on the
low side The tank is identi
cal to the Mobitherm MWH
The QL Water Heater has a tank ca with any protective casing THE CONSTRUCTION of the tank is butes to the water in the
water heater
pacity of 20 litres and can be moun The thermostat of the heating ele simple and the material is acidpro having the lowest temperature
toget
ted horizontally and vertically The ment is adjustable the temperature of steel AISI 316 The heat ex her with the Mobitherm after
water heater has simple feet that are range is from 30 to changer is very rudimentary as the hour of engine running The
tempera
test results also to a strap that goes 80 degrees The safety mechanism ture is only
round the tank does not work as intended on boiling The QL Water Heater has low wa 485 degrees After 12 hours
of coo
Both the tank and the heat ex dry the sensor is located too far ter loss after 12 hours the total water ling the tank delivered 12
litres of wa
changer are made of acidproof steel away from the heating element The loss was 59 degrees This gives a ter at a temperature above
AISI 316 The insulation is of poly result is that the water heater knocks total heat loss per hour of 049 degre 40 foam but is not equipped
against the operating thermostat es An inefficient heating coil contri
Mobitherm MWH020 Price NOK 3750
CONCLUSION
The QL Water Heater is a
simple hotwater tank The
heat coil is Ushaped and
thus makes poor use of the
coolant Only 12 litres of hot
water above 40 degrees is
on the low side The tank is
identical to the QL Water
Heater
The Mobitherm has a capacity of USEFUL labelling of the connection SIMPLE CONSTRUCTION and the ves an average heat loss
per hour of
20 litres and can be mounted hori points on the tank material is acidproof AISI 316 steel 044 degrees An inefficient
heat coil
The insulation is unprotected The test shows that the heat ex contributes to the water in the and vertically The water he
changer is rudimentary The tank is
ater has simple feet spotwelded to a The thermostat of the heating ele heater having the lowest
temperatu
identical to the QL
strap that goes round the tank ment is adjustable the temperature re together with the QL
after one
Both the tank and heat exchanger hour of engine running
The tempe
range is from 30 to 80 degrees that the water heater knocks against
are made of highquality acidproof rature is only 482 degrees
After 12
The safety thermostat does not the operating AISI 316 The insulation is of
hours of cooling the tank delivered
work as intended on boiling dry the The Mobitherm Cal 020 has low
12 litres of water at a foam but is not equip sensor is located too far away from heat loss after 12 hours the total
above 40 degrees
ped with any protective casing the heating element The result is heat loss was 53 degrees This gi
CONCLUSION
The Sigmar Thermoinox is a
Sigmar Thermoinox Price 2575
simple water heater The
choice of material is good
but the insulation can be
improved A heat loss of
more than 20 degrees over
12 hours is scandalous
Its capacity is also very
poor The water heater only
managed to deliver nine li
tres of hot water from its
tank of 22 litres
The Sigmar Thermoinox has capa POOR insulation on the Sigmar SIMPLE TANK The heat coil is a sim 201 degrees This gives an
average
city of 22 litres and can be mounted Thermoinox but the connection ple U and the water heater has high heat loss per hour of 168
and vertically The water points are well labelled heat loss After one hour of engine running the
heater has simple feet that are spot not equipped with any protective ca the operating thermostat Here too water heater delivers water
at a tem
welded to a strap that goes round the sing the sensor for the thermostat is loca perature of 606 degrees
The capa
tank The thermostat of the heating ele ted too far away from the heating ele city is however lamentable
Both the tank and the heat ex ment is adjustable from 30 to ment The water heater only manages
changer are made of acidproof steel 80 degrees The safety thermostat The Sigmar Thermoinox has the deliver nine litres of
water above
AISI 316 The insulation is polyuret does not work as intended on boiling highest heat loss in the test After 40 degrees
hane foam but the water heater is dry The water heater knocks against 12 hours the total heat loss was
CONCLUSION
ATI BB 2212 Price NOK 2530
The ATI BB 2212 is a hotwa
ter tank with an unusual
choice of materials Instead
of acidproof steel the insi
de of the steel tank has been
enamelled A plus point for a
powerful heat exchanger
but the capacity of the tank
is inadequate
heat
exchanger for optimum utili
sation of the engine coolant
Unfortunately the tank has
The ATI has capacity of 22 litres and THE CONNECTIONS on the tank of the ling dry because the heating ele high heat loss and poor
capa
ATI ought to have been labelled better city
can be mounted horizontally and ver ment The ATI is the
tically The water heater has simple The ATI is the only tank in the test to only tank in the test to have a zinc one hour of heating We
measured
use 38 inch couplings on the inlet and
feet that must be screwed onto the outlet of the freshwater side
anode fitted as standard on the hea the temperature as being as high as
straps that go round the tank ting element 688 degrees A decent heat
The tank is made of steel but the sistant aluminium protects the insula The ATI has high heat loss After changer with as many as 16
loops is
surface is enamelled and heattre tion 12 hours the total heat loss was responsible for the good
result
ated at 860 degrees The heat ex The thermostat of the heating ele 192 degrees This gives an average Unfortunately the capacity of
the tank
changer is made of copper and the ment is adjustable in the range from heat loss of 16 degrees per hour On is not good It only
manages to is made of polyurethane 0 to 70 degrees The safety thermos the other hand the water heater has ver eight litres of water
above
A casing of anodised seawaterre tat does not work as intended on boi the highest water temperature after 40 degrees
Webasto 20 L Price NOK 4340
CONCLUSION
The Webasto 20 L is the big
surprise in the test It might
THE WEBASTOS tank has many
connection be thought that the name
points would oblige It evidently
with good does not do so in this case
labelling The capacity of the tank is
below criticism it does not
manage to deliver a drop of
water above 40 degrees In
addition its price is far too
high
The Webasto has a capacity of In addition to the heat exchanger OWN HEAT COIL for use together The Webasto 20 L has
relatively
20 litres and can be mounted hori which is connected to the engine co with boat heaters The high location high heat loss After 12
hours the to
zontally and vertically The water he oling system the water heater has of the heat exchanger that circulates tal heat loss is 173
degrees This gi
the engine coolant contributes to
ater has simple feet spotwelded to its own heat exchanger for the con the poor test result ves an average heat loss
per hour of
straps that go round the tank nection of external heat for example 144 degrees The water
temperatu
Both the tank and the heat ex Webasto boat heaters as intended on boiling dry The water re after one hour of engine
are made of acidproof ste The thermostat of the heating ele heater knocks against the operating is 572 degrees It is AISI 316 The
insulation is made ment is adjustable the temperature thermostat This happens because that the tank does not deliver water
of polyurethane foam but it is not range is from 30 to 80 degrees the sensor of the thermostat is located above 40 degrees after 12
hours of
equipped with any protective casing The safety thermostat does not work too far away from the element cooling
TEST water heaters in the 20litre class
simulates a natural cycle as found on a board with a pressure increase of 01 bar
How we performed leisure craft The temperature was measured Measurements were performed when the
the test The circulation of the engine coolant was then
started up again to equalise the temperature
valve started to ooze water and when there
was full opening
he test was performed in the heavy lab drop which the one litre of cold water had The test was performed in March and
oratory of the Department of Maritime brought about The circulation this time was April 2004
Sciences at Vestfold University College interrupted after half an hour The tank was
HIVE in Horten A Fluke 54 II temperature then left standing for 12 hours to simulate a
gauge was used as measuring equipment The night on board Cold water was added to the
instrument was calibrated in a liquid bath at tank after 12 hours with a flow rate of four
IKM Laboratorier in Tananger In addition a litres a minute The temperature was mea
pressure gauge was used during the pressure sured for each 15 seconds or for each litre
testing of the tanks The pressure gauge is ac drained from the tank
curate to 5 per cent The test on the heating elements of the tanks
A test bench was used during the test A hot was carried out by setting the thermostat to
water tank with a 3000 Watt heating element max The tank was then filled with water at a
delivers coolant at a temperature of 70 de temperature of 20 degrees and then it was
grees A circulating pump was used to circu plugged in The temperature as measured when
late the coolant through the heat exchanger in the thermostat tripped for the first time The
the water heaters The speed of the pumps test on the safety thermostat was carried out by
could be regulated and they could be adjusted the tank being connected to the power source
so that the flow through the heat exchanger of WITHOUT there being water in the water
the tank was 3 litres a minute The tanks were heater The time before the safety thermostat
fitted and connected before each test They tripped was then measured Several of the tanks
were then filled with freshwater at a tempera did not pass the test and for these the test was
ture of 20 degrees before circulation of terminated after 30 minutes
coolant was started The circulation was in The pressure test on the safety valve was
terrupted after an hour when precisely one undertaken by filling the tanks with water and
litre of cold water 20 degrees was added then adding compressed air The compressed
through the freshwater inlet of the tank This air was let into the tank by means of a WATER HEATERS IN THE 20LITRE CLASS
Water heater Isotemp Isotemp Quick Vetus QL Mobitherm Sigmar ATI
Webasto
Basic Slim 20 Nautic Boiler WH20A Water MWH020 Thermoinox BB 2212 20L
Heater
Temp after
1 hour engine running 558 627 643 63 485 482 606 686 572
Temp after
12 h cooling 519 506 487 552 426 429 405 496 399
Heat loss 39 121 156 78 59 53 201 192 173
Heat loss
degrees per hour 033 1 13 065 049 044 168 16 144
No litres water
above 40 degrees 23 litres 15 litres 15 litres 17 litres 12 litres 12 litres 9 litres 8 litres 0
litres
Temp with 696 672 783 662 823 828 839 625 811
Time before trips 4 min 50 sec 4 min 01 sec Element Element
Residual water
after draining 02 litres 04 litres 078 litres 265 litres 076 litres 01 litres 092 litres 365 litres 068 DATA
Volume 24 litres 20 litres 20 litres 20 litres 20 litres 20 litres 22 litres 22 litres 20
480 mm 660 mm 505 mm 540 mm 387 mm 391 mm 538 mm 492 mm 401 mm
Width 395 mm 287 mm 327 mm 406 mm 352 mm 351 mm 299 mm 318 mm 347
Height 400 mm 302 mm 313 mm 430 mm 395 mm 374 mm 299 mm 326 mm 384
Weight 11 kg 115 kg 109 kg 23 kg 9 kg 8 kg 11 kg 14 kg 9 kg
Heating element output 750 watt 750 watt 500 watt 1000 watt 800 watt 800 watt 800 watt 1200 watt 800
watt
Opening of safety 6 bar 56 bar 56 bar 42 bar 39 bar 36 bar 37 bar 3 bar
31 bar
Full opening 6 bar 6 bar 58 bar 44 bar 43 bar 44 bar 42 bar 4 bar 37 bar
Diameter of couplings
Heat exchanger 12 12 12 12 12 12 12 12 12
Inlet cold water 12 12 12 12 12 12 12 38 12
Outlet hot water 12 12 12 12 12 12 12 38 12
Price 1 85 NOK 3350 3265 2350 3855 3125 3750 2575 2530 4340
Indel Marine I 61019 S Agata Feltria PU Italy Phone 39 0541 848030

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