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DIMENSIONS
MODELS BW4 and BW5
A
19
5
⁄
8
″
GAGE
36″
1
1
⁄
4
″
RETURN
1
1
⁄
4
″ SUPPLY
CONTROL
TANKLESS
HEATER
1
⁄
2
″ N.P.T.
9″
C B
3
⁄
4
″ ASME
RELIEF
VALVE
FRONT SIDE REAR
DIMENSIONS (In.)
UNIT SIZE A B C
140 17-3/4 6 9-3/4
210 21 6 11-3/8
280 24-1/4 6 13
CLEARANCES (In.)
* Clearance 18 in. for BW5.
† Service clearance requirement 24 in.
RIGHT SIDE 16*
LEFT SIDE 16*
TOP 16*
BACK 16*
FRONT 16†
FLUE 18*
RATINGS AND PERFORMANCE
* MBH = 1,000 BTU per hour / BTU = British Thermal Unit.
**Heating Capacity is based on a 13 percent C02 with a –0.02 in. wc and a #1 smoke or less. Testing was done in accordance with the D.O.E. (Department of
Energy) test procedure.
+GPH = Gallons per hour oil at 140,000 BTU per gallon.
++A.F.U.E. = Annual Fuel Utilization Efficiency based upon D.O.E. test procedure.
As an Energy Star Partner, the manufacturer has determined that this product meets Energy Star guidelines for Energy Efficiency.
BOILER MODEL NO. NO. SEC.
INPUT
*MBH
**HEAT-
ING CA-
PACITY
*MBH
NET
I=B=R
RATING
*MBH
FIRING
RATE
+GPH A.F.U.E. ++
MINIMUM CHIMNEY
SIZE/ HEIGHT DIMENSIONS - IN.
WITH TANKLESS
COIL
WITHOUT TANKLESS
COIL ABC
BW5BAH091 BW4BAH091 3 91 80 70 0.65 86.3 8-in. x 8-in. x 15 ft 14-1/2 6 8
BW5BAH105 BW4BAH105 3 105 92 80 0.75 85.2 8-in. x 8-in. x 15 ft 14-1/2 6 8
BW5BAH140 BW4BAH140 3 140 119 103 1 83.4 8-in. x 8-in. x 15 ft 14-1/2 6 8
BW5BAH126 BW4BAH126 4 126 111 97 0.9 86.0 8-in. x 8-in. x 15 ft 17-3/4 6 9-5/8
BW5BAH175 BW4BAH175 4 175 150 130 1.25 83.9 8-in. x 8-in. x 15 ft 17-3/4 6 9-5/8
BW5BAH210 BW4BAH210 4 210 178 155 1.5 82.4 8-in. x 8-in. x 15 ft 17-3/4 6 9-5/8
BW5BAH168 BW4BAH168 5 168 147 128 1.2 86.5 8-in. x 8-in. x 15 ft 21 6 11-1/2
BW5BAH245 BW4BAH245 5 245 209 182 1.75 83.6 8-in. x 8-in. x 15 ft 21 6 11-1/2
BW5BAH280 BW4BAH280 5 280 236 205 2 82.0 8-in. x 8-in. x 20 ft 21 6 11-1/2