HeatSpongeby Boilerroom Equipment, Inc.

Bruce / Online proposal generator

Start with the boiler.
Get to the right economizer.

Enter the operating conditions you know. Bruce evaluates the application and prepares an engineered HeatSponge selection, performance estimate and proposal.

Start selection How to use this tool
HeatSponge economizers mounted above industrial steam boilers
Have these readyBoiler make and capacityWater inlet temperatureFlue-gas temperature at full loadAnnual operating hours

HeatSponge boiler economizer

Build your selection.

Start with the core fields. Expand the optional sections only when your project needs more control.

01

Boiler basics

Your boiler make helps Bruce evaluate its available gas-side pressure drop. Select the closest category if the exact model is not listed.

02

Operating profile

Enter the flue-gas temperature at 100% firing. Temperatures at other loads may be left blank; Bruce estimates them. Set hours to match your actual load distribution.

Firing loadGas inlet tempHours/yearExcess air %
Firing load100%
Firing load
Firing load
Firing load
FGR takeoff location
03

Design preferences

Bruce can compare the original standard models. For a COLOSSUS application, request an engineering review so the proposed arrangement matches your duty.

Model starting point
Fin spacing and materials

Choose based on fuel and water conditions. Aluminum-fin options have stainless or carbon steel tubes; SHORTY uses a different coil construction.

Draft inducer

Bruce uses these inputs to generate a proposal. Review boiler fan limits and site constraints before ordering.

Only when your project calls for it

Optional engineering inputs

These controls remain part of the same proposal form. Open the relevant section and keep the rest at their defaults.

01 / Custom water flowFor process water or nonstandard circuits

Leave blank for a typical boiler feedwater economizer. Enter flow only when it differs from the boiler-capacity flow Bruce would otherwise use.

02 / Two-stage recoverySecond water stream and arrangement
Stage arrangement
03 / Performance and constructionEfficiency, target outlet, tubing and fluid
Use efficiency override?
Identical-unit stacking in one casing
To meet target
Stainless tube override
04 / Specification assistantStandard, VA or legacy welded specification

Choose a specification only when the project documents call for it. Confirm every code, material and inspection requirement with the actual specification.

Specification basis
VA compliance and clarifications
Flue-gas bypass damper
Sootblower
Instrumentation package
Stack corrosion control

Review Section I requirements, design pressure and temperature, materials, access, casing, transitions and inspection documents with the project engineer. Potential conflicts in older specifications require written clarification.

Two-inch welded-tube specification
Sootblower

This specification calls for an all-welded, two-inch tube design. Confirm compatibility, repair access and material restrictions before using it as the selection basis.

05 / Professional overridesBackpressure and custom exhaust flow

Use these controls only when the boiler’s allowable backpressure and exhaust flow are documented. Excess gas-side pressure drop can affect boiler operation.

Automatic model selection

Bruce uses these inputs to generate a proposal. Review boiler fan limits and site constraints before ordering.