# Check providers and compare written proposals

Lesson 3 of [Boiler buyer foundations](https://boilerpros.fyi/academy/boiler-buyer-foundations.md), 12 minutes.

A useful boiler quote explains what the provider proposes and lets you compare it with other proposals. ENERGY STAR recommends checking local contractor licence and insurance requirements, requesting references, obtaining written itemized estimates and signing a written proposal before work starts.…

The rest of this lesson is for learners enrolled in the course. [See how Boiler buyer foundations works](https://boilerpros.fyi/academy/boiler-buyer-foundations.md).

Also on the [web page](https://boilerpros.fyi/academy/boiler-buyer-foundations/select-and-compare-providers).