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Boiler Make required	Select Manufacturer or Type --- Atmospheric Boilers --- Ajax Atmospheric Burner Rite Atmospheric Burner To be Advised --- Commercial Hot Water Boilers --- Buderus Burnham Commercial Camus Columbia DeDietrich Hydrotherm LES Lochinvar Miura Parker Patterson Kelley PVI RBI Rite Smith Triad Boiler Weil McLain --- Firetubes (Scotch Marine) --- Boilersmith Burnham Columbia Continental Cleaver-Brooks Cyclotherm Donlee Eclipse English Boiler Easco Hurst Industrial Johnston Kewanee Myrggo North American Sellers Superior Apache Superior Arrowhead Superior Aztec Superior Mohawk Superior Mohican Superior Seminole Superior Super Seminole Superior (other) Tecnolog Triad Boiler Systems Victory Energy Three-Pass Victory Energy Four-Pass York-Shipley Unlisted Firetube --- Flextube Watertubes --- Bryan English BTBF Novatherm Unilux Flextube Universal Boiler Works Unlisted Flextube --- Industrial Watertubes (D-A-O-S Types) --- ABCO Aalborg B & W Bigelo Cleaver-Brooks D-Type Clayton Combustion Engineering English Boiler Erie City Foster Wheeler Fulton IBW Indeck-Keystone Keeler McBurney Miura Murry Trane Nebraska Rentech Tecnolog Titusville Unilux Union Iron Works Vapower Victory Energy Volcano Zurn Unlisted Industrial Watertube
Boiler Capacity required	BTUH HP PPH TONS KW KPH
Water Flow Rate optional	GPM PPH If you leave this cell blank and set to GPM Bruce will automatically calculate the flow rate based a 100 40 35 30 25 20 deg F temp rise. If set to PPM will calculate water flow as if it was a steam boiler. Check to allow flow rate to track firing rate Note to match to IBR/AHRI condensing boiler performance standards set rise to 100 deg F and inlet water temperature to 80 deg F below
Inlet Water Temp & Optional Outdoor Air Reset Schedule	deg Fdeg C Reset ON Reset OFF	Optional Reset Temp 2	Optional Reset Temp 3	Optional Reset Temp 4
Firing Rate	Load Condition 1 100 % Firing	Load Condition 2 % Firing	Load Condition 3 % Firing	Load Condition 4 % Firing
Inlet Flue Gas Temp	Load 1 Required	Optional	Optional	Optional
	Flue Gas Temp @ 100% Load is Only Required Entry - Part Load Temperatures are Automatically Calculated if Left Blank
Required Flue Gas Exit Temperature required	- This is the temperature you want Bruce to target when sizing the economizer. If left blank Bruce will pick the mid-point of the flue gas and water inlet temperatures.
Annual Hours @ Firing Rate
Excess Air	15358101215172025303540455055 %	15358101215172025303540455055 %	15358101215172025303540455055 %	20358101215172025303540455055 %
Flue Gas Recirculation Rate	05152025 3035404550 %	FGR Taken Before Economizer FGR Taken After Economizer
Fuels Fired	Natural Gas w/ #2 Oil Standby - 5 fins per inch #2 Fuel Oil Firing - 4 fins per inch
Current Boiler Efficiency	0.81 0.80 0.79 0.78 0.77 0.76 0.75 0.74 0.73 0.72 0.71 0.70 0.65 0.82 0.83 0.835 0.84 0.845 0.85 0.86 0.87 0.88 %
Stack Diameter	0 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 in	Leave 0 if diameter unknown
Draft Inducer	Not required - use boiler fan to overcome pressure drop Incorporate fan-assisted draft inducer. Supply by others.
Fuel Price	8.00 4.00 4.25 4.50 4.75 5.00 5.25 5.50 5.75 6.00 6.25 6.50 6.75 7.00 7.25 7.50 7.75 8.00 8.25 8.50 8.75 9.00 9.25 9.50 9.75 10.00 10.25 10.50 10.75 11.00 11.25 11.50 11.75 12.00 12.25 12.50 12.75 13.00 13.25 13.50 13.75 14.00 14.25 14.50 14.75 15.00 15.25 15.50 15.75 16.00 16.25 16.50 16.75 17.00 17.25 17.50 17.75 18.00 18.25 18.50 18.75 19.00 19.25 19.50 19.75 20.00 20.25 20.50 20.75 21.00 21.25 21.50 21.75 22.00 22.25 22.50 22.75	dollars per million btu
Maximum Water Side Pressure Drop	15 10 7 5 PSI
Water Specific Heat	1.0 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2	for glycol systems
Maximum Unit Overall Length (not including piping connections)	No length restriction - DEFAULT 3' 10" Overall Length 4' 4" Overall Length 4' 10" Overall Length

Manual Unit Selection / Bypass Bruce - For Experienced Boiler Technicians Only:
AutoPick ON
AutoPick OFF - Manual Selection below
Experienced boiler professionals may bypass Bruce's AutoPick software and manually select a maximum gas side pressure drop from the selection chart below. Just because a data page will be printed out means HeatSponge confirms that a manually selected unit will work on a given boiler. Excessive backpressure will seriously impact boiler operation.

This feature is also a very good way to compare the performance of a competitive unit to a HeatSponge. If you are comparing units and the competitive unit has a higher gas side pressure drop than our AutoPick selects use this feature to see how a HeatSponge would compare to the competitive selection. Some competitors will try to sell a smaller unit with an excessively high backpressure simply to offer a lower price.
Select Maximum Allowable Backpressure: 0.05 0.06 0.07 0.08 0.09 0.10 0.12 0.15 0.17 0.20 0.22 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.90 1.00 1.25 1.50 1.75

Flue Gas Mass Flow Calculation Override - For Experienced Boiler Technicians Only:
Experienced boiler professionals may custom select the flue gas mass or volumetric flow rate. You must both enter the flow rate and units to use as well as check the override checkbox.
PPH ACFM SCFM KPH Bypass checkbox required

Final unit selection could be affected by other operational constraints. HeatSponge reviews all selections for accuracy prior to placement of any purchase order.