Rot at the sill drives more searches here than efficiency ever will
The queries you can realistically win describe a visible failure, not a performance number the homeowner cannot verify.
Humidity and a high water table keep wood damp for most of the year. Sashes bind, sills go soft, exterior doors swell and stop latching, and paint fails in a pattern homeowners recognize long before they know what to call it. They search in those words, not in yours.
Give each failure its own page. Rotted window sill. Door that will not close. Sash cord repair. Fogged glass between panes. Each page should say what generally causes it, what can be repaired, what usually gets replaced, and what happens on the visit. Write the way you would explain it standing on the steps.
Pages like that are cheap to produce and they hold their position for years, because the national brands write about products and never about symptoms. They also send you people who have already accepted that something has to be done.
Keep the efficiency page, but stop expecting it to carry the site. Every manufacturer published a better version of it a decade ago and they all outrank you on it.