ECR Pennco 15B045FE, Installation, Operation & Maintenance Manual

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Table 1 - Minimum Room Volume, Indoor Air Only*
Input Mbh
Standard
Method
Known Air Infiltration Rate Method (Air Changes Per Hour)
0.1 0.2 0.3 0.4 0.5 0.6
45 2250 9450 4725 3150 2363 1890 1575
70 3500 14700 7350 4900 3675 2940 2450
96 4800 20160 10080 6720 5040 4032 3360
120 6000 25200 12600 8400 6300 5040 4200
145 7250 30450 15225 10150 7613 6090 5075
175 8750 36750 18375 12250 9188 7350 6125
195 9750 40950 20475 13650 10238 8190 6825
245 12250 51450 25725 17150 12863 10290 8575
295 14750 61950 30975 20650 15488 12390 10325
* Table values based on boiler only. Add volume for any additional appliances.
4 - VENTILATION & COMBUSTION AIR
Provide combustion air and ventilation air in accordance
with the section “Air for Combustion and Ventilation,” of
the National Fuel Gas Code, ANSI Z223.1 / NFPA 54, or
applicable provisions of local building codes.
Provide make-up air where exhaust fans, clothes dryers,
and kitchen ventilation equipment interfere with proper
operation.
National Fuel Gas Code recognizes several methods
of obtaining adequate ventilation and combustion air.
Requirements of the authority having jurisdiction may
override these methods.
• Engineered Installations . Must be approved by
authority having jurisdiction.
• Mechanical Air Supply . Provide minimum of
0.35 cfm per Mbh for all appliances located within
space. Additional requirements where exhaust fans
installed. Interlock each appliance to mechanical air
supply system to prevent main burner operation when
mechanical air supply system not operating.
• All Indoor Air . Calculate minimum volume for all
appliances in space. Use a different method if minimum
volume not available.
A. Standard Method. Cannot be used if known air
infiltration rate is less than 0.40 air changes per
hour. See Table 1 for space with boiler only. Use
equation for multiple appliances.
Volume ≥ 50 ft
3
x Total Input [Mbh]
B. Known Air Infiltration Rate. See Table 1 for
space with boiler only. Use equation for multiple
appliances. Do not use an air infiltration rate
(ACH) greater than 0.60.
Volume ≥ 21 ft
3
⁄ACH x Total Input [Mbh]
C. Refer to National Fuel Gas Code for opening
requirements between connected indoor spaces.
• All Outdoor Air. Provide permanent opening(s)
communicating directly or by ducts with outdoors.
A. Two Permanent Opening Method . Provide
opening commencing within 12 inches of top and
second opening commencing within 12 inches of
bottom of enclosure.
Direct communication with outdoors or
communicating through vertical ducts. Provide
minimum free area of 1 in² per 4 Mbh of total
input rating of all appliances in enclosure.
Communicating through horizontal ducts.
Provide minimum free area of 1 in² per 2
Mbh of total input rating of all appliances in
enclosure.
B. One Permanent Opening Method . Provide
opening commencing within 12 inches of top of
enclosure. Provide minimum clearance of 1 inch on
sides/back and 6 inches on front of boiler (does not
supersede clearance to combustible materials).
C. Refer to National Fuel Gas Code for additional
requirements for louvers, grilles, screens and air
ducts.
• Combination Indoor and Outdoor Air. Refer to
National Fuel Gas Code for application information.