The Ultimate Guide For Installing a Gas Fireplace

When taking on a large-scale project like installing a gas fireplace, you want to feel confident you have everything you need. You must ensure it’s correctly installed, considering it could be very hazardous if done wrong. Northside Tool Rental is here to help by providing you with everything you need to complete your project safely and correctly.

Let’s review how to install a gas fireplace.


Before starting a project of any size, you’ll want to ensure you have all the necessary tools and equipment. There are few things more frustrating than having to stop mid-project because you find you’re missing a necessary tool. Below is a list of all the tools and equipment you’ll need depending on what kind of gas fireplace you’re installing.

  • Brad nail gun
  • Caulk gun
  • Circular Saw
  • Cordless Drill
  • Drill bit set
  • Drywall sander
  • Drywall saw
  • Dust mask
  • Hammer
  • Hearing protection
  • Knee pads
  • Knockdown knife
  • Level
  • Mud pan
  • Paintbrush
  • Rasp
  • Roller sleeve
  • Roller tray
  • Sanding block
  • Sanding pole
  • Screw gun
  • Socket/ratchet set
  • Straightedge
  • Stud finder
  • T-square
  • Tape measure
  • Tin snips
  • Utility knife


Take the time to research the right fireplace; the size and style are two essential factors for your home. Another consideration is the necessary prep for installation. You will need a plumber to plan your gas line route and, depending on the model, an electrician to run wiring to your install location. Finally, you’ll need to install an exhaust pipe between the studs in your wall. Use your stud finder to help decide your install location.


First, when you receive your new gas fireplace, read the entire instruction manual. Use this as a guideline for your installation regarding clearance requirements.

You’ll need to build a platform or frame depending on the kind of fireplace you are installing. Once your fireplace is positioned on its platform, you can continue the installation process.

step four: VENTILATION

You’ll begin by attaching the vent pipe to the starting collar located on the top or back of your fireplace. Follow the specific instructions that come with your fireplace. Next, you seal the connection with stove cement or the recommended sealant for that model.

Now that you’ve got your vent pipe installed, you’ll need to install your ventilation pipe. Your ventilation pipe goes from the vent pipe to the exhaust pipe.

Draw on your wall with a pencil where the hole for your exhaust pipe will be. Then, hold up your exhaust pipe elbow to ensure the hole is in the correct place.


Cut out a 12-in square hole with your drywall saw; use your stud finder again to avoid obstructions.

Build a frame for your 12-in square opening; this is where your wall pass-through will go. Your wall pass-through protects your home and walls from the hot exhaust pipe.

Once your frame is built, you’ll need to cut another hole going through the exterior wall. Drill four ⅜-in holes through to the outside. Place one in each corner of your 12-in frame. Doing this will give you a guide to accurately cut a corresponding 12-in hole from the outside.

Go outside and, using your circular saw, cut four straight lines connecting the holes you just drilled.

Insert your wall pass-through in your 12-in opening and ensure it fits properly. Next, remove it and fit your interior firestop. Next, you’ll fit in your pass-through and connect your ventilation to the exhaust pipe, and fit your exhaust pipe through your installed pass-through and seal with high-temperature silicone caulk using a caulking gun.

Steps six: install your vent

Once everything is connected on the inside, you’ll move outside to install your exterior vent. You’ll slide in your vent termination; the instruction manual will give specifics depending on the model you purchased. Seal and secure it into place.


You’re getting close to the final stages of your installation. Your next step will be finalizing the position of your fireplace and securing the platform to the floor. Then you’ll connect your gas and electric to your stove. Finally, you can use soapy water on the gas line connections to check for gas leaks.

After you’ve ensured everything is connected properly and in working order, you’ll finish building your frame. Follow the recommended spacing from the fireplace for your frame per your instruction manual.

Now your fireplace is ready for finishing touches and paint!

northside tool rental has you covered

Whether you’re tackling a landscaping project or a major renovation inside your home, Northside Tool Rental has the equipment you need to get the job done. Save yourself time and money by renting instead of making large purchases of items you may only use once. Check out our catalog of rental equipment and start planning your next project today.