Understand the recovery. Make the right selection.

Two guides cover the fundamentals of boiler economizers and the information needed to use HeatSponge’s online selection software.

Explore the guides

Start with the question

Which guide do you need?

01 / Fundamentals

How does an economizer work?

Learn how boiler exhaust transfers heat to water, why gas-side pressure drop matters, and how water temperature and material selection affect the application.

Heat transfer and available heat sinks
Flue-gas backpressure and water flow
Feedwater, make-up water, and process uses

Read the economizer tutorial

02 / Online selection

How do I select a HeatSponge?

Use the selection-software guide to understand the required boiler and water inputs, refine a project-specific selection, and prepare an online proposal.

Required boiler and operating data
Project-specific selection inputs
Proposal and performance workflow

Read the selection guide

← Back to all documentation

Ready to apply it?

Start with your boiler data.

Capacity, exhaust temperature, inlet water temperature, and boiler make are a practical starting point for evaluating heat recovery.

Generate an online proposal Talk to an engineer