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FAQs: Heating systems
1. I would like to fit a heating system to my boat, what heater do I need?
Yes we have a heating system to suit every type of boat. Our Air Heaters range from 2Kw to 9Kw and our Water Heaters range from 4Kw to 47Kw. As a general rule we would install our heaters as follows:
| Airtop 2000 Boat up to 30ft |
Airtop 3500 Boat up to 40ft |
Airtop 5000 Boat up to 50ft |
Thermotop C Boat up to 40ft |
Thermo 90 Boat up to 60ft |
This is purely a guide as cabin volumes vary from boat to boat. The heater should be correctly specified against the actual volume of the cabins on your boat.
2. How much diesel will my heater use?
Webasto heaters are very fuel-efficient and use very little diesel. The fuel consumption figures are as follows:
| Airtop 2000 0.12 l/h full load 0.24 l/h partial load |
Airtop 3500 0.42 l/h full load 0.17 l/h partial load |
Airtop 5000 0.60 l/h full load 0.17 l/h partial load |
Thermotop C 0.59 l/h full load 0.29 l/h partial load |
Thermo 90 0.90 l/h full load 0.19 l/h partial load |
Please be aware that the heater will only run on full load for a short period of time and once the boat has heated up the heater will reduce the heat output, therefore reducing the fuel consumption down to the levels of the partial load figures.
3. What sort of controls are available with the Webasto range of heaters?
The Airtop range of heaters is supplied as standard with a rotary controller, which turns the heater on and off and gives fully variable control of the heat output of the heater. It is possible to upgrade to a digital timer which allows the user to programme on / off times for the heater. Webasto Water heaters come as standard with a very simple digital timer which allows the user to program three start times per day. Both systems can be upgraded by fitting Webasto Thermocall, which allows the user to control their Webasto heater via their telephone, ensuring you always receive a warm welcome when you open the cabin door.
4. How many outlets can I run off my Air Heater?
As a general rule we recommend that a maximum of two outlets are installed on an Airtop 2000 system, up to four outlets on an Airtop 3500 system and up to 5 outlets on an Airtop 5000 system.
5. I would like to blow warm air around my cabins but I want to be able to heat the domestic hot water, is this possible?
It is possible to install fan matrixes on a water heating system; this allows us to produce warm air in the cabins whilst still producing domestic hot water.
6. What sort of guarantee and back up do I get with my Webasto Heater?
All Webasto heaters are under full guarantee for two years from date of installation. Webasto are active in 56 countries worldwide and have an extensive dealer network to fully support our products. For details of your nearest dealer please use the dealer locater found on our home page.
7. How much battery power will my heater use?
| Airtop 2000 (12v) 1.8 amps full load 0.75 amps partial load |
Airtop 3500 (12v) 3.0 amps full load 1.25 amps partial load |
Airtop 5000 (12v) 7.5 amps full load 1.25 amps partial load |
Thermotop C (12v) 3.5 amps full load 2.60 amps partial load |
Thermo 90 (12v) 6.9 amps full load 3.70 amps partial load |
Please be aware that the heater will only run on full load for a short period of time and once the boat has heated up the heater will reduce the heat output, therefore reducing the power consumption down to the levels of the partial load figures.
8. I am unsure whether I want an air or water system, what are the benefits of each system?
An Air Heating System is generally easier to install and heats a cold boat faster than a Water Heating System. However a Water Heating system not only heats the boat but also produces domestic hot water.
FAQs: Cooling systems
1. I would like to Air Condition my boat, what sort of systems do Webasto offer?
At Webasto we have an Air Conditioning system to suit every boat. Our BlueCool Classic range of Self Contained Air Conditioning units are the ideal solution for single cabin cooling, with all of the components neatly mounted on a compact frame.
The revolutionary BlueCool Select air conditioning system comes in a variety of versions and a whole range of specifically developed new components adapt to any installation needs. It provides individual blower speed control for each cabin, the central unit can be placed away from cabin to limit noise impact and the modular system solves any installation constraint.
Our BlueCool Premium range of Chilled Water Systems offers a multi cabin cooling solution from the smallest boat to the largest Super Yacht. A centrally located chiller cools water before it is circulated around the boat to air handlers, which cool the air and blow it into the cabins. The temperature in each cabin can be controlled via independent controllers making the system very versatile.
2. Which would be the correct system to install on my boat?
As a general rule we would use Self Contained units to cool three or less cabins, with a unit installed in each cabin and a single raw water-cooling pump supplying the units via a pump relay. This type of system is easy to install and less expensive than a Chilled Water System.
When four or more cabins require cooling, it becomes more economical to consider a Chilled Water System. This type of system will generally take up less space in the cabins and is far more suitable for a multi cabin installation.
3. Where in each cabin should I install the outlet grilles on a climate control system?
The outlet grilles on any Air Conditioning System should be installed at the highest possible point in the cabin, to allow the best possible cooling effect. This principle is the same on a climate control system. Whilst warm air rises, the blower capacity on an Air Conditioning System is up to three times higher than on a heating system and providing the return air grilles are low down the air flow is sufficient to provide a good heating output, despite having high outlets.
4. I am concerned about air noise in the cabins, what can I do to minimise this?
There are a number of ways of reducing air noise in the individual cabins, firstly it is important to fit the minimum required size of air grille in the cabins as they are correctly specified to provide maximum air flow with minimum noise. We also recommend the use of a transition box to spread the air evenly over the grille. Via the digital controls it is also possible to reduce the blower speed in individual cabins, however lower blower speeds do cause a reduction in BTU output.
5. I want to put a Self Contained unit in a sleeping cabin; will it be too noisy at night?
If the unit is installed directly underneath a bed it will require plenty of sound insulation to lower noise levels. It is also inadvisable to put a grille directly in front of the unit, as this will allow the noise of the unit to escape directly into the cabin. To solve this problem the grille should be offset from the unit preventing the sound from entering the cabin.
6. What sort of guarantee and back up will I get if I decide to purchase a Webasto Air Conditioning System?
Webasto offer a full two-year guarantee with all of our Air Conditioning products. We are active in over 56 countries worldwide, with an extensive dealer network widening our coverage further still.
7. Can I use my Air Conditioning System to heat the cabins in cooler weather?
It is possible to provide heat through an Air Conditioning system using a reverse cycle valve. However this method is only efficient when the ambient temperature of the cooling water is above 10°C and stops working completely when the ambient temperature of the cooling water falls to 4°C.
Webasto are able to offer a Total Climate Control System, our BlueComfort solution, which utilises a specially engineered diesel heater within the Air Conditioning System. Using this method we are able to provide the selected temperature regardless of the ambient temperature of the cooling-water. The heater is fully integrated and is controlled via the Air Conditioning controller.
8. On a Chilled Water System is it possible to have one cabin running in heat mode and one in cool mode?
It is possible to do this but it would require two separate, parallel water circuits, one for heating and one for cooling and on smaller boats this is impractical. However we can get around this problem by installing a/c heating elements inside the individual air handlers, allowing heat to be provided individually in each cabin.
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