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Determine the Amount of BTUs Needed for a Boat and Other Spaces

How to Size Your Boat and
Determine the Amount of BTUs

Below Deck
Length x Width x 6' average height x 14 BTU

10' x 7' = 70 sq.ft.
70 sq.ft. x 6' = 420 cu.ft.
420 cu.ft. x 14 BTU = 5,880 BTU + 1,000 BTU
Recommended BTUs: 6,880 BTU

Topside (area above main deck)
Length x width x 7' average height x 17 BTU

18' x 11' = 198 sq.ft.
198 sq.ft. x 7' = 1,386 sq.ft.
1,386 x 17 BTU = 23,562 BTU + 1,000 BTU
Recommended BTUs: 24,562 BTU

BTU Calculator

Enter in the length, width, and height of the space to be air conditioned.

= cubic feet

Which level onboard?

Below Deck/Cabin
Above Deck/Deckhouse

Climate Zone

(examples: Miami Beach, Key West, San Juan, Charlotte Amalie, Honolulu, Hagåtña, Saipan, Pago Pago, Acapulco, Mazatlán, Cancún, Nassau, Havana, Santo Domingo, Willemstad, Port of Spain, Panama City, Dakar, Lagos, Jeddah, Dubai, Mumbai, Mangalore, Bhubaneshwar, Yangon, Bangkok, Singapore, Hong Kong, Kaohsiung, Manila, Belém, Rio de Janeiro, Port Louis, Jakarta, Denpasar, Darwin, Cairns, Nouméa, Papeete)

(examples: Stuart, Naples, Atlanta, Myrtle Beach, Virginia Beach, Memphis, New Orleans, Houston, Las Vegas, Los Angeles, Fresno, Reynosa, Tijuana, Tokyo, Naha, Taipei, Busan, Jinan, Shanghai, Chongqing, Delhi, Tel Aviv, Cairo, Heraklion, Catania, Málaga, Casablanca, Hamilton, São Paulo, Joinville, Santiago, Buenos Aires, Montevideo, Cape Town, Johannesburg, Perth, Brisbane, Sydney, Auckland)

Transitional (Between Subtropical and Temperate)
(examples: San Jose, Modesto, Saint George, Ponta Delgada, Lisbon, Barcelona, Marseille, Rome, Split, Sarandë, Athens, Burgas, Istanbul, Batumi, Iwaki, Concepción, Bahía Blanca, Mar del Plata, Edinburgh of the Seven Seas, Martin-de-Viviès, Melbourne, Tauranga)

(examples: New York City, Boston, Baltimore, Pittsburgh, Louisville, Detroit, Chicago, Kansas City, Denver, San Francisco, Portland, Seattle, Vancouver, Calgary, Toronto, Montreal, Halifax, Edinburgh, London, Santiago de Compostela, Paris, Nantes, Venice, Amsterdam, Düsseldorf, Hamburg, Stockholm, Saint Petersburg, Rostov-on-Don, Beijing, Seoul, Sendai, Sapporo, Launceston, Hobart, Wellington, Christchurch, Valdivia, Comodoro Rivadavia)

Recommended BTUs:
Kilowatt hours: kWh Kilocalories: kcal

Note: The BTUs calculated are intended to be used as a guide. There are many other factors which can influence the recommended BTUs. Other factors to consider include insulation, seasonal weather, direct sunlight, window tinting, heat from equipment, air flow, humidity, elevation, and ocean currents. Standard room temperature is 77°F (25°C).

A/C Installation Kits

All self-contained A/C kits include:

  • 25' of 4" round non-insulated ducting
  • 20' of ⅝" seawater condenser hose
  • 10' of ½" condensation drain hose
  • One (1) plenum (transition box)
  • One (1) standard control panel
  • One (1) Seawater Pump
  • One (1) hardware assortment pack
    (screws, clamps, etc.)
    Seawater kit includes:

  • 1 - Seawater strainer ¾" inlet/outlet
  • 1- Bronze ¾" thru-hull fitting
  • 1 - Stainless steel ball valve ¾"
  • 4 - ¾" stainless steel hose clamps
  • 1- ¾" threaded to ¾" barb fitting
  • 1 - ¾" nipple
  • 4' of ¾" seawater-in hose

  • Teak, wood and other non-standard grills may be special ordered.
  • 6,500 - 9,000 BTU
  • One 8" x 8" return air grill
  • Two 4" supply grills
  • 12,000 - 17,000 BTU
  • One 10" x 10" return air grill
  • Three 4" supply grills

  • 20,000 + BTU
    Units delivered as base unit with control. Air Conditioning Kits are optional.

    Other available products include:
    Remote Air Conditioning, Chill Water, Refrigeration, Freezer & Cold Plate Systems
    Custom made Cooling Equipment... Call for further information

    Self-contained Marine A/C Units follow link  |  Split Systems follow link  |  Air-cooled Control Room Package Units follow link

    Ocean Breeze
    Manufactured by Quorum Marine & Electronics, Inc.

    Tel (772) 220-0038  |  Toll Free (866) 227-7773  |  Fax (772) 220-0260

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