Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of EQT Infrastructure Company LLC (the “Company”) for the quarter ended June 30, 2025, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Patrik Burnäs, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

* The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate disclosure document.

Date: August 13, 2025

/s/ Patrik Burnäs

Patrik Burnäs

Chief Financial Officer

(Principal Financial Officer)

EQT Infrastructure Co LLC 10-Q