Gas Log sizing for your fireplace can be hard, but our experts are here to help. Before speaking with them, here’s a couple things you may need.
How to Size Your Fireplace
1 Front Width
2 Rear Width
3 Depth
4 Height
Once you follow these steps, visit one of our showrooms with a picture of your fireplace along with these measurements and you’ll be well on your way to a new gas log set.
Want to learn more? Read below for detailed information on sizing.
| G4 & G45 Burner Sizing (Match Lit Only) | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 12" (G4) | 16" Front & 12" Rear | 11" | 15" | 25k (Nat & LP) |
| 16" | 19" Front & 16" Rear | 11" | 17" | 39k (Nat & LP) |
| 19" | 22" Front & 17" Rear | 11" | 17" | 39k (Nat & LP) |
| 18/20" | 24" Front & 18" Rear | 13" | 17" | 75k (Nat) & 50k (LP) |
| 24" | 28" Front & 23" Rear | 13" | 17" | 90k (Nat) & 65k (LP) |
| 30" | 34" Front & 27" Rear | 14" | 17" | 90k (Nat) & 65k (LP) |
| 36" | 40" Front & 34" Rear | 15" | 17" | 120k (Nat) & 90k (LP) |
| 42" | 46" Front & 40" Rear | 20" | 17" | 130k (Nat) & 110k (LP) |
| 48" | 53" Front & 45" Rear | 20" | 17" | 145k (Nat) & 115k (LP) |
| 60" | 64" Front & 56" Rear | 20" | 17" | 150k (Nat) & 120k (LP) |
| G4 & G45 Burner Sizing (with Safety Pilot Kit) | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 12" (G4) | 21" Front & 19" Rear | 11" | 15" | 25k (Nat & LP) |
| 16" | 26" Front & 22" Rear | 11" | 17" | 39k (Nat & LP) |
| 19" | 26" Front & 22" Rear | 11" | 17" | 39k (Nat & LP) |
| 18/20" | 29" Front & 25" Rear | 13" | 17" | 75k (Nat) & 50k (LP) |
| 24" | 34" Front & 29" Rear | 13" | 17" | 90k (Nat) & 65k (LP) |
| 30" | 39" Front & 34" Rear | 14" | 17" | 90k (Nat) & 65k (LP) |
| 36" | 46" Front & 39" Rear | 15" | 17" | 120k (Nat) & 90k (LP) |
| 42" | 51" Front & 45" Rear | 20" | 17" | 130k (Nat) & 110k (LP) |
| 48" | 58" Front & 52" Rear | 20" | 17" | 145k (Nat) & 115k (LP) |
| 60" | 69" Front & 63" Rear | 20" | 17" | 150k (Nat) & 120k (LP) |
| G45 ANSI Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 16/19" | 26" Front & 23" Rear | 11" | 17" | 40k (Nat) & 30k (LP) |
| 18/20" | 29" Front & 26" Rear | 13" | 17" | 70k (Nat) & 45k (LP) |
| 24" | 34" Front & 30" Rear | 13" | 17" | 90k (Nat) & 65k (LP) |
| 30" | 39" Front & 35" Rear | 16" | 17" | 95k (Nat) & 75k (LP) |
| 36" | 46" Front & 40" Rear | 16" | 17" | 110k (Nat) & 90k (LP) |
| G31 ANSI Burner Sizing (Match Lit Only) | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 18" | 23" Front & 14" Rear | 16" | 17" | 55k |
| 24" | 29" Front & 17" Rear | 16" | 17" | 65k |
| 30" | 32" Front & 17" Rear | 16" | 17" | 65k |
| 33" | 34" Front & 23" Rear | 16" | 17" | 85k |
| 39" | 41" Front & 23" Rear | 16" | 17" | 85k |
| G31 ANSI Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 18" | 28" Front & 22" Rear | 16" | 17" | 55k High & 20k Low (Nat) 40k High & 21k Low (LP) |
| 24" | 34" Front & 25" Rear | 16" | 17" | 65k High & 21k Low (Nat) 50k High & 22k Low (LP) |
| 30" | 36" Front & 27" Rear | 16" | 17" | 65k High & 21k Low (Nat) 50k High & 22k Low (LP) |
| 33" | 39" Front & 30" Rear | 16" | 17" | 85k High & 22k Low (Nat) 60k High & 23k Low (LP) |
| 39" | 41" Front & 32" Rear | 16" | 17" | 85k High & 22k Low (Nat) 60k High & 23k Low (LP) |
| G46 ANSI Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 18/20" | 26" Front & 20" Rear | 15" | 17" | 40k (Nat & LP) |
| 24" | 30" Front & 24" Rear | 15" | 17" | 55k (Nat & LP) |
| 30" | 36" Front & 29" Rear | 15" | 17" | 65k (Nat & LP) |
| G52 ANSI Burner Sizing (Match Lit Only) | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 18" | 25" Front & 20" Rear | 15" | 17" | 46k |
| 24" | 29" Front & 24" Rear | 15" | 17" | 55k |
| 30" | 31" Front & 26" Rear | 15" | 17" | 55k |
| G52 ANSI Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 18" | 28" Front & 22" Rear | 16" | 17" | 46k High & 33k Low (Nat) 36k High & 27k Low (LP) |
| 24" | 32" Front & 24" Rear | 16" | 17" | 55k High & 37k Low (Nat) 46k High & 26k Low (LP) |
| 30" | 36" Front & 28" Rear | 16" | 17" | 55k High & 37k Low (Nat) 46k High & 26k Low (LP) |
| P45 ANSI Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 18" | 25" Front & 19" Rear | 16" | 17" | 43k (Nat) & 36k (LP) |
| 24" | 31" Front & 25" Rear | 16" | 17" | 65k (Nat) & 55k (LP) |
| 30" | 37" Front & 31" Rear | 16" | 17" | 84k (Nat) & 70k (LP) |
| P45 ANSI Burner Sizing (Match Lit Only) | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 18" | 24" Front & 18" Rear | 15" | 17" | 43k (Nat) |
| 24" | 30" Front & 24" Rear | 15" | 17" | 65k (Nat) |
| 30" | 36" Front & 30" Rear | 15" | 17" | 84k (Nat) |
| G45-GL Burner Sizing (Match Lit Only) | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 16/19" | 18" Front & 15" Rear | 12" | 16" | 35k (Nat) |
| 18/20" | 23" Front & 17" Rear | 12" | 16" | 55k (Nat) |
| 24" | 27" Front & 22" Rear | 12" | 16" | 75k (Nat) |
| 30" | 33" Front & 26" Rear | 12" | 16" | 75k (Nat) |
| 36" | 39" Front & 33" Rear | 12" | 16" | 100k (Nat) |
| 42" | 45" Front & 39" Rear | 12" | 16" | 105k (Nat) |
| 48" | 52" Front & 44" Rear | 12" | 16" | 110k (Nat) |
| 60" | 63" Front & 55" Rear | 12" | 16" | 120k (Nat) |
| G45-GL Burner Sizing (with Safety Pilot Kit) | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 16/19" | 26" Front & 22" Rear | 12" | 16" | 35k (Nat) & 28k (LP) |
| 18/20" | 29" Front & 25" Rear | 12" | 16" | 55k (Nat) & 38k (LP) |
| 24" | 34" Front & 29" Rear | 12" | 16" | 75k (Nat) & 50k (LP) |
| 30" | 39" Front & 34" Rear | 12" | 16" | 75k (Nat) & 60k (LP) |
| 36" | 46" Front & 39" Rear | 12" | 16" | 100k (Nat) & 70k (LP) |
| 42" | 51" Front & 45" Rear | 12" | 16" | 105k (Nat) & 85k (LP) |
| 48" | 58" Front & 52" Rear | 12" | 16" | 110k (Nat) & 90k (LP) |
| 60" | 69" Front & 63" Rear | 12" | 16" | 120k (Nat) & 105k (LP) |
| G8 Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 16" | 17" Front & 13" Rear | 9 1/2" | 17" | 20k (Nat) & 9.5k (LP) |
| 20" | 21" Front & 13" Rear | 9 1/2" | 17" | 20k (Nat) & 9.5k (LP) |
| 24" | 26" Front & 13" Rear | 9 1/2" | 17" | 20k (Nat) & 9.5k (LP) |
| G9 Burner Sizing (Manual Valve) | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 20" | 24" Front & 20" Rear | 14" | 18" | 36k High & 17k Low (Nat & LP) |
| 24" | 29" Front & 20" Rear | 14" | 18" | 36k High & 17k Low (Nat & LP) |
| 30" | 34" Front & 26" Rear | 14" | 18" | 36k High & 17k Low (Nat & LP) |
| G9 Burner Sizing (Millivolt Valve) | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 20" | 26" Front & 22" Rear | 14" | 18" | 36k High & 21k Low (Nat & LP) |
| 24" | 30" Front & 22" Rear | 14" | 18" | 36k High & 21k Low (Nat & LP) |
| 30" | 34" Front & 26" Rear | 14" | 18" | 36k High & 21k Low (Nat & LP) |
| G10 Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 16/18" | 22" Front & 20" Rear | 13" | 18" | 35k High & 32k Low (Nat & LP) |
| 24" | 28" Front & 20" Rear | 14" | 18" | 37k High & 19k Low (Nat & LP) |
| 30" | 34" Front & 20" Rear | 14" | 18" | 37k High & 19k Low (Nat & LP) |
| G18 Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 16/18" | 22" Front & 20" Rear | 13" | 18" | 30k (Nat & LP) |
| 24" | 30" Front & 20" Rear | 14" | 18" | 38k (Nat & LP) |
| 30" | 36" Front & 26" Rear | 14" | 18" | 38k (Nat & LP) |
| G21-GL Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 18" | 22" Front & 16" Rear | 13" | 15" | 30k (Nat) & 27k (LP) |
| 24" | 28" Front & 21" Rear | 13" | 15" | 35k (Nat) & 30k (LP) |
| 30" | 34" Front & 28" Rear | 13" | 15" | 40k (Nat) & 35k (LP) |
| G19 Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front & Rear Width | Depth | Height | BTU Rating |
| 18" | 24" Front & 22" Rear | 14" | 16" | 31k (Nat) & 30k (LP) |
| 24" | 30" Front & 24" Rear | 14" | 16" | 40k (Nat) & 34k (LP) |
| 30" | 34" Front & 26" Rear | 14" | 16" | 40k (Nat) & 34k (LP) |
| G18-2 Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front Width | Depth | Height | BTU Rating |
| 16/18" | 22" Front | 18" | 18" | 35k (Nat & LP) |
| 24" | 26" Front | 18" | 18" | 40k (Nat & LP) |
| G9-2 Burner Sizing (Millivolt) | ||||
|---|---|---|---|---|
| Log Size | Front Width | Depth | Height | BTU Rating |
| 24" | 28" Front | 18" | 18" | 39k (Nat & LP) |
| VFSM Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front Width | Depth | Height | BTU Rating |
| 18" | 32" Front & 21" Rear | 14" | 17" | 32k (Nat & LP) |
| 24" | 34" Front & 27" Rear | 14" | 18" | 36k (Nat & LP) |
| 30" | 38" Front & 30" Rear | 14" | 20" | 38k (Nat & LP) |
| VFSR Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front Width | Depth | Height | BTU Rating |
| 16" | 24" Front & 18" Rear | 11 1/2" | 18" | 25k (Nat & LP) |
| 18" | 28" Front & 17" Rear | 14" | 17" | 32k (Nat & LP) |
| 24" | 30" Front & 23" Rear | 14" | 18" | 36k (Nat & LP) |
| 30" | 34" Front & 26" Rear | 14" | 20" | 38k (Nat & LP) |
| VFSV Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front Width | Depth | Height | BTU Rating |
| 16" | 24" Front & 18" Rear | 11 1/2" | 18" | 25k (Nat & LP) |
| 18" | 28" Front & 17" Rear | 14" | 17" | 32k (Nat & LP) |
| 24" | 30" Front & 23" Rear | 14" | 18" | 36k (Nat & LP) |
| 30" | 34" Front & 26" Rear | 14" | 20" | 38k (Nat & LP) |
| VFSE Burner Sizing | ||||
|---|---|---|---|---|
| Log Size | Front Width | Depth | Height | BTU Rating |
| 18" | 28" Front & 17" Rear | 14" | 17" | 32k (Nat & LP) |
| 24" | 30" Front & 23" Rear | 14" | 18" | 36k (Nat & LP) |
| 30" | 34" Front & 26" Rear | 14" | 20" | 38k (Nat & LP) |