Vermont Castings Merrimack Wood Insert

Starting at $3,478

Watching the flames and feeling the warmth of a wood fire is an experience that never gets old. The Merrimack wood insert maintains that timeless appeal and highlights large, unobstructed views of the fire, turning your existing masonry fireplace into an efficient centerpiece.

Attention to detail extends past the appearance to the convenient operating features. Advanced technologies make for easy startups and continual warmth. A heat-activated blower distributes comfort to every corner.

  • Heats 1,400-2,800 sq ft with 55,000 BTUs, based on climate and home efficiency
  • Up to 12 of burn time from each load of wood
  • Conveniently burn up to 18” logs
  • Automatic startup air control assists in starting the fire
  • Heat-activated, variable speed fan comes standard

Own With Confidence

Limited Lifetime Warranty Limited Lifetime Warranty
Environmental Protection Agency Approved Environmental Protection Agency Approved

Current Offers

Related Products

Vermont Castings Montpelier Wood Insert Vermont Castings Montpelier Wood Insert

Model Comparison

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Timeless Cast Iron Styling Timeless Cast Iron Styling
Auto Start-Up Air Control Auto Start-Up Air Control
22 22" Logs
Variable Speed Fan Kit Variable Speed Fan Kit


Finish your wood-burning insert with these available surrounds.

Northfield Surround Northfield Surround
Exeter Surround Exeter Surround

Insert Finishes

Color choices complete the look of your insert.

Classic Black Classic Black

Options & Accessories

Leather Gloves Leather Gloves
Cast Iron Wood Box Cast Iron Wood Box
Safety Screen Safety Screen

Dimensions in inches. Refer to installation/owner's manual for detailed specifications on installing this product. Hearth & Home Technologies reserves the right to update units periodically. Product installation must adhere strictly to instructions shipped with product.

Model Specifications


Appliance Width:31-1/2"
Appliance Height:26-5/16"
Appliance Depth:25-3/8"
Front Width Minimum Firebox Opening:29-3/4"
Height Minimum Firebox Opening:24-1/4”
Depth Minimum Firebox Opening:18-1/2"
Back Width Minimum Firebox Opening:25"
Peak BTU/hr Output:56,000
Heating Capacity:1,400 - 2,800 sq ft
Maximum Burn Time:12 hrs
Firebox Capacity:3.1 cu ft
Recommended Log Length:18"
Viewing Area:330 sq in
Emissions:3.6 grams/hour

Appliance Depth includes entire unit including depth of firebox and extension onto hearth.

Framing depth will vary if you are installing the lower profile power vent (PVLP-SLP) with a minimum vent configuration. 12-1/2” is needed from the back of the appliance to the outside of the exterior wall. Refer to manual for details.

BTU: 1st hour output uses high burn efficiency number. BTU will vary depending on the type of fuel used and moisture content of the fuel.

BTU/hr Input based on maximum feed rate per hour multiplied by approximately 8600 BTU, which is average BTU from a pound of pellets.

This is a general guide, see your local dealer for help in determining the product that best suits your heating needs based on climate, home efficiency, location of the heater, and air movement in the room.

Actual burn times will vary based on how the appliance is operated, load size, moisture content and type of wood used.

Fuel density and pellet shape will affect hopper capacity.

Weighted Average LHV (Low Heating Value) efficiency.

Heat output will vary depending on the type of fuel used. The flame and ember appearance may vary based on the type of fuel burned and the venting configuration used. Actual product appearance, including flame may differ from image shown. Refer to the owner's manual for complete clearance requirements and specifications. Product specifications and pricing subject to change without notice. For testing and listing information please refer to the owner's/installation manual.

*For select products: Heating capacity to be used as a guide only. See your local dealer for help in determining the product that best suits your heating needs based on climate and home efficiency.

†For wood-burning appliances: Actual burn times will vary based on how the appliance is operated, load size, moisture content and type of wood used, and installation.