Brochure

ManualsBrandsRinnai ManualsGas Space HeatersEX22CTWN

Learn more at rinnai.us Learn more at rinnai.us

III

Calculate the volume (cubic feet) or square

footage of the space that will be heated.

• Calculate volume (in cubic feet) by

multiplying the length (in feet) times the

width (in feet) by the height (in feet)

• Calculate square feet by multiplying the

length (in feet) times the width (in feet)

Choose your location on the map and the

BTU Zone on the chart at right.

Select model based on either calculated

cubic feet or square feet.

Select the right vent-free

fan convector or direct

vent furnace

NATIONAL HEAT ZONES

HEAT ZONES

* Chart should not be used as the sole document for making ﬁnal product selection.

Consult with your Rinnai independent dealer. Based on 8 ft. ceiling height. These

guidelines apply to average house construction. Information based on Sizing

Guidelines for Vent-Free Gas.

** In single rooms in Region V, multiply the room’s volume by 3.20. The result is the

maximum heat input (BTU/hr) of the product that you should consider.

NOTE: Rinnai Vent-Free Fan Convectors are intended for supplemental heating

only, according to the International Fuel Gas Code (IFGC), and should be used

in applications as such. Some states prohibit the use of unvented heaters. Check

local codes for your area to verify approval of use.

VENT-FREE FAN CONVECTOR AND DIRECT VENT SELECTION GUIDE

ROOM VOLUME / HEATING AREA SIZE

BTU ZONE MODEL CUBIC FEET SQUARE FEET*

FC510 UP TO 5,400 UP TO 680

FC824 5,401 - 13,000 681 - 1,600

EX08CT UP TO 3,500 UP TO 440

EX11CT 3,501 - 4,800 441 - 600

EX17CT 4,801 - 7,300 601 - 910

EX22CT 7,301 - 9,400 911 - 1,180

EX38CT 9,401 - 16,600 1,181 - 2,080

FC510 UP TO 4,500 UP TO 560

FC824 4,501 - 10,900 561 - 1,400

EX08CT UP TO 3,000 UP TO 380

EX11CT 3,001 - 4,100 381 - 510

EX17CT 4,101 - 6,100 511 - 760

EX22CT 6,101 - 7,900 761 - 990

EX38CT 7,901 - 14,000 991 - 1,750

III

FC510 UP TO 3,800 UP TO 480

FC824 3,801 - 9,200 481 - 1,200

EX08CT UP TO 2,500 UP TO 310

EX11CT 2,501 - 3,400 311 - 430

EX17CT 3,401 - 5,200 431 - 650

EX22CT 5,201 - 6,700 651 - 840

EX38CT 6,701 - 11,800 841 - 1,480

FC510 UP TO 3,200 UP TO 400

FC824 3,201 - 7,600 401 - 1,000

EX08CT UP TO 2,100 UP TO 260

EX11CT 2,101 - 2,800 261 - 350

EX17CT 2,801 - 4,300 351 - 540

EX22CT 4,301 - 5,500 541 - 690

EX38CT 5,501 - 9,800 691 - 1,230

V**

FC510 UP TO 2,600 UP TO 330

FC824 2,601 - 6,200 331 - 800

EX08CT UP TO 1,700 UP TO 210

EX11CT 1,701 - 2,300 211 - 290

EX17CT 2,301 - 3,500 291 - 440

EX22CT 3,501 - 4,500 441 - 560

EX38CT 4,501 - 8,000 561 - 1,000