Can I seal these vents on my gas fireplace? Cold air constantly

NAPOLEON Ascent X 36 Direct Vent Gas Fireplace – US Fireplace Store

Preventing Moisture Problems in Direct Vent Gas Applications, 2020-12-29

MYG Magnetic Fireplace Draft Stopper - Fireplace Cover to Block Cold Air from Vent to Prevent Heat Loss - Magnet Fireplace Screen - Indoor Chimney Draft Blocker Vent Covers- 36 x 6

Fireplace Building Science - Pros and Cons - Energy Vanguard

Air Sealing Your Home

Sealing fire place side vents - Community Forums

Gas fireplace draft ?

Gas Fireplaces: Direct Vent vs. Vent-Free - Fine Homebuilding

Cold flooring by Fireplace - RedFlagDeals.com Forums

How to Care for Your Gas Fireplace

Gas Fireplace Buying Guide