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Insert Installation Specifications

Insert Model: Hearthstone Killington HT Gas Insert

Extension Into fireplace... 19-3/4"T x 27-3/4"W (tapers to 20 1/2"W at rear) x 16"D
Extension Onto Hearth with small surround panels... 27-1/2"T x 38"W x 1"D
Extension Onto Hearth with large surround panels... 31-3/4"T x 44"W x 1"D

A: Fireplace Opening Width............... Min. 28", Max. 43"
B: Fireplace Opening Height................Min. 21", Max. 31"
C: Minimum Fireplace Depth at Floor......................... 17"
D: Minimum Fireplace Depth at 23" above Floor......... 14"
E: Minimum Fireplace Width at 16" Depth................... 21"
F: Minimum Hearth Width............................................. 0"
G: Centerline of Fireplace Opening to Sidewall............ 22"
H: Minimum Hearth Depth ........................................... 0"
I : Minimum Flue Size Needed to Accomodate Exhaust Flex............................................ 4" x 8"
M: (a) Minimum Height from Hearth to Combustible Mantel up to 7 1/2" Deep...................... 40"
M: (b) Minimum Height from Hearth to Combustible Trim up to 1" Deep............................... 38"
M: (c) Minimum Height from Hearth to Flush Combustibles w/standard surround................... 28"
M: (c) Minimum Height from Hearth to Flush Combustibles w/oversize surround.................... 32"

Surround Panel Sizes:
Standard: 27-1/2"T x 38"W
Oversize: 31-3/4"T x 44"W

INSTALLING THE INTAKE / EXHAUST LINER KIT
	Flues up to 17' Tall: Stretch the 35' length of aluminum flex liner included in the liner kit to its full length, cut it in half, and attach the two lengths to the intake and exhaust ports on the adapter box with silicone sealant and pipe clamps. Silicone the sealer plate to the top of the chimney. Fish the lengths down through the plate and the fireplace damper below. Attach the adapter box to the sealer plate with sheet metal screws and twist-lock the rain cap on. Down below, use clamps and silicone sealant to attach the liners to the intake and exhaust ports on the insert.	Flues 17' - 30' Tall: Cut the exhaust liner from the 35' flex length, attach it to the exhaust port on the adapter box with a pipe clamp and silicone sealant. Fish the liner down through the sealer plate and the fireplace damper below. Silicone the sealer plate to the chimney top, attach the adapter box to the sealer plate with sheet metal screws and twist-lock the rain cap on. Down below, clamp and silicone seal the exhaust liner to the insert's exhaust port. Attach the remaining length of liner to the intake port, curl the top over and insert it up through the fireplace damper.

GAS HOOKUP: A 24" length of 3/8" standard pipe thread flex connector (supplied with unit) exits the insert near the bottom of the right side. Make the gas connection while the insert is on hearth, attach the surround panels, then slide the insert into place.

NOTE: THIS DIRECT VENT GAS APPLIANCE COMES WITH DETAILED, STEP BY STEP INSTRUCTIONS FOR DO-IT-YOURSELF INSTALLATIONS. TO VALIDATE YOUR
WARRANTY AND ENSURE OPTIMUM SAFETY AND PERFORMANCE, HOWEVER, FINAL SETUP ADJUSTMENTS AND INITIAL FIRING MUST BE ACCOMPLISHED BY A
TRAINED GAS SERVICE TECHNICIAN. CONSULT YOUR GAS SUPPLY COMPANY FOR A LIST OF RECOMMENDED SERVICE TECHNICIANS IN YOUR AREA.

Click to View or Download the installation manual in .pdf format

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