Engineered industrial heat recovery
Since 2005, Boilerroom Equipment has manufactured more than 2,500 heat exchangers. HeatSponge brings advanced economizer configurations and application-specific engineering to boiler systems around the world.
Built around the application
Start with the boiler and the heat sink—not a catalog number. Every selection considers recovery, allowable backpressure, materials, footprint, and long-term serviceability.
Steam boiler economizers
Conventional and condensing heat recovery for commercial and industrial steam boilers—from compact SHORTY units to large Atlas-class systems.
Two-stage economizers capture additional heat from boiler exhaust. Our industry-exclusive Type III internal three-pass configuration is engineered for the highest possible multistage condensing performance while keeping condensate from flowing back toward the boiler.
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Hydronic boiler economizers
Rainmaker is an external condensing economizer designed for the high circulating-water flows of hydronic heating. Its modular ASME Code design uses 316 stainless steel wetted surfaces and can be configured for new or existing boilers.
By recovering sensible and latent heat from exhaust, it can bring a conventional boiler to condensing-boiler efficiency under identical operating conditions, without replacing the boiler. At higher water temperatures, it continues to recover sensible heat.
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Custom engineered systems
Wet and dry steam accumulators, cogeneration heat recovery, waste-heat boilers, and one-of-a-kind engineered equipment.
View product familyThe HeatSponge difference
Useful heat recovery is not simply heating surface. It is the balance of thermodynamics, pressure drop, condensate management, materials, controls, maintenance access, and installation cost.
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Finned-tube geometry and application-specific surface area maximize practical recovery within real operating limits.
Designs are checked against boiler fan capability to protect combustion performance and avoid unnecessary parasitic load.
Type III internal multi-pass arrangements optimize condensing while isolating the boiler from condensate carryover.
Accessible tubes, service-friendly casings, and flexible materials support long equipment life.
Project gallery
A condensing HeatSponge economizer recovered boiler exhaust heat and produced documented utility and operating savings.
Horizontal economizers were engineered around an exceptionally constrained installation—described by the project team as “building a ship in a bottle.”
Bruce · Online sales engineer
Bruce selects the unit, predicts performance, recommends options, and generates scope, pricing, commercial terms, P&IDs, and cut sheets in real time.
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