How to choose the right air-conditioner
The right cooling capacity
Example: You own a yacht and would like to aircondition a room of 5 m (length) x 5 m (width) x 2 m (height).
Category 2 average glass area, cabins partly below deck (500 BTU/m 3 )
Category 1 portlights only, cabin(s) all below deck (400 BTU/m 3 )
Step 1: Define the category of the cabin Determine the category of the cabin . We give an example for a cabin with an average glass area, for example a deck saloon. Step 2: Define the net volume Determine the net volume of the room (5 m x 5 m x 2 m = 50 m 3 ; subtract 20 % for furniture in the room; 50 m 3 - 10 m 3 = 40 m 3 ; If you want to air condition the whole boat, please calculate the sum of your rooms . Step 3: Define your climate region Determine the climate region where you spend most of your time. For example the Mediterrean Sea is a “normal region” in the climate category. Step 4: Identify your cooling requirements Result: You need an air conditioning system with a 20,000 BTU / h cooling capacity . Step 5: Decide between a self-contained and chiller system Depending on the demands you can decide on a self-contained or chiller system with a cooling capacity of 20,000 BTU / h.
Category 2
region: normal
region: normal
cold
hot
cold
hot
Volume of the rooms L x W x H (m 3 ) 10
Volume of the rooms L x W x H (m 3 ) 10
5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 45,000 50,000 55,000 60,000 65,000 70,000 75,000 80,000 85,000 90,000 95,000 100,000
3,750 7,500 11,250 15,000 18,750 22,500 26,250 30,000 33,750 37,500 41,250 45,000 48,750 52,500 56,250 60,000 63,750 67,500 71,250 75,000
6,250 12,500 18,750 25,000 31,250 37,500 43,750 50,000 56,250 62,500 68,750 75,000 81,250 87,500 93,750 100,000 106,250 112,500 118,750 125,000
4,000 8,000 12,000 16,000 20,000 24,000 28,000 32,000 36,000 40,000 44,000 48,000 52,000 56,000 60,000 64,000 68,000 72,000 76,000 80,000
3,000 6,000 9,000 12,000 15,000 18,000 21,000 24,000 27,000 30,000 33,000 36,000 39,000 42,000 45,000 48,000 51,000 54,000 57,000 60,000
5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 45,000 50,000 55,000 60,000 65,000 70,000 75,000 80,000 85,000 90,000 95,000 100,000
20 30 40 50 60 70 80 90
20 30 40 50 60 70 80 90
40 m 3
100 110 120 130 140 150 160 170 180 190 200
100 110 120 130 140 150 160 170 180 190 200
Normal region
20,000 BTU / h
BlueCool S20
Category 3 glass area above average, saloon above deck (600 BTU/m 3 )
Category 4 very large glass areas, saloon and wheel house above deck (750 BTU/ m 3 )
region: normal
cold
hot
Volume of the rooms L x W x H (m 3 ) 10
region: normal
cold
hot
Volume of the rooms L x W x H (m 3 ) 10
Step 1
Category 1
6,000
4,500 9,000
7,500
portlights only, cabin(s) all below deck (400 BTU/m 3 )
7,500 15,000 22,500 30,000 37,500 45,000 52,500 60,000 67,500 75,000 82,500 90,000 97,500 105,000 112,500 120,000 127,500 135,000 142,500 150,000
5,625 11,250 16,875 22,500 28,125 33,750 39,375 45,000 50,625 56,250 61,875 67,500 73,125 78,750 84,375 90,000 95,625 101,250 106,875 112,500
9,375
20 30 40 50 60 70 80 90
12,000 18,000 24,000 30,000 36,000 42,000 48,000 54,000 60,000 66,000 72,000 78,000 84,000 90,000 96,000 102,000 108,000 114,000 120,000
15,000 22,500 30,000 37,500 45,000 52,500 60,000 67,500 75,000 82,500 90,000 97,500 105,000 112,500 120,000 127,500 135,000 142,500 150,000
20 30 40 50 60 70 80 90
18,750 28,125 37,500 46,875 56,250 65,625 75,000 84,375 93,750 103,125 112,500 121,875 131,250 140,625 150,000 159,375 168,750 178,125 187,500
13,500 18,000 22,500 27,000 31,500 36,000 40,500 45,000 49,500 54,000 58,500 63,000 67,500 72,000 76,500 81,000 85,500 90,000
Step 3
region: normal
cold
hot
Volume of the rooms L x W x H (m 3 ) 10
4,000 8,000
3,000 6,000 9,000
5,000
20 30 40 50 60 70 80 90
10,000 15,000 20,000 25,000 30,000 35,000 40,000 45,000 50,000 55,000 60,000 65,000 70,000 75,000 80,000 85,000 90,000 95,000 100,000
12,000 16,000 20,000 24,000 28,000 32,000 36,000 40,000 44,000 48,000 52,000 56,000 60,000 64,000 68,000 72,000 76,000 80,000
Step 2
Step 4
100 110 120 130 140 150 160 170 180 190 200
12,000 15,000 18,000 21,000 24,000 27,000 30,000 33,000 36,000 39,000 42,000 45,000 48,000 51,000 54,000 57,000 60,000
100 110 120 130 140 150 160 170 180 190 200
100 110 120 130 140 150 160 170 180 190 200
For precise BTU calculations, please use our Marine specification and calculation tool, available on the dealer portal at http://dealers.webasto.com
For extreme climatic conditions such as the Persian Gulf with sea-water temperatures of 32 °C and air temperatures of 40 °C, you have to add 25 to 30 % onto the calculated figure.
88
89
Made with FlippingBook Digital Proposal Creator