Make your home quieter, healthier, and cheaper to run.
No sales pitch. Just clear, field-tested guidance on insulation, air sealing, HVAC, and everything that makes a house perform right, from a pro who's spent 25 years fixing them.
Six things that actually move the needle.
Skip the noise. These are the areas where the right decision pays you back for decades, and the wrong one quietly costs you every month.
Insulation
Where heat really escapes, and how much to add before you’re just wasting money.
Read the guide →Air sealing
The cheapest upgrade most homes never do. Find the leaks and seal them the right way.
Read the guide →HVAC
Right-sizing, maintenance, and knowing when a system is costing you far more than it should.
Read the guide →Solar
When panels actually pencil out, what to ask installers, and the efficiency work to do first.
Read the guide →Indoor air quality
Ventilation, filtration, and humidity: comfort and health, not just the energy bill.
Read the guide →Home energy audits
What a real audit finds, what the gear reveals, and how to actually act on the report.
Read the guide →
25 years in crawlspaces, attics, and mechanical rooms.
I'm Jeff Haag. I own Diversified Energy, a home performance and insulation company based in New Orleans. I got my start in 1999 as an energy auditor through the Louisiana Department of Natural Resources, and spent years assessing homes across the state before building a career around home performance, weatherization, and insulation.
This site is the advice I'd give a friend: what's worth doing, what's a waste of money, and how to tell the difference. No affiliate links, no upsell.
"A house is a system. Fix one thing without understanding the rest, and you just move the problem somewhere else."
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