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Martin - MDV20VN Natural Gas Direct Vent Thermostatic Heater 20,000 Btu Visor
$1,199.00
Authorized Martin® Dealer
Full Manufacturer Warranty Included
- No Tax & Free Shipping: Delivered free to the Lower 48 states. HI and AK shipping available by quote.
- Fast Fulfillment: Ships within 1–5 Business Days
- Powerful Heating: 20,000 BTUs warm up to 538 sq. ft. comfortably
- Cozy View & Comfort: Exclusive glass ceramic window provides a beautiful view of the flame and added radiant warmth.
- Reliable Backup Heat: Works 100% without electricity (Piezo Ignition)
- Direct Vent Safety: Draws fresh air from outside for clean, safe indoor air
- Continuous Supply: Connects directly to your home's gas line so you never run out of heat.
- Sleek Dimensions: 26" Width x 22 5/8" Height x 8 1/4" Depth
- Protected Investment: 1-Year Manufacturer Warranty included. (Extended Warranty available above).
Have Questions?
Chat, Call, or Text a Specialist
Found a better price? We'll match it or beat it!
1-844-945-3625
- Description
- Best Price Guarantee!
- Why Buy From Us
- Warranty & Support
Description
🚛 Delivered free to the Lower 48 states* Shipping to Alaska & Hawaii is extra. Please chat or call us for a quote. 
Designed for large main rooms or open-concept cabins. Built-in thermostat (Hi-Low dial). Ceramic Glass Window
Enjoy the ambiance of a visible flame with the "Visio" model, adding radiant warmth and a cozy focal point. 100% Off-Grid Ready
Operates without any electrical connection, ensuring heat is available even during power outages. Safe Direct Venting
A sealed system that draws combustion air from outside and vents exhaust externally, preserving indoor air quality. Durable Design
Features a heavy-duty die-cast aluminum grill for superior heat distribution and longevity. CSA-Certified Quality.
Heating Capacity
20,000 BTU (up to 538 sq. ft.)*
Wall Space Needed
Total 38" Wide area required (Unit is 26" W + Clearances).
Gas Connection
Natural Gas only. Requires technician.
High Altitude Note
Rated up to 2,000 ft. Reduce rating by 4% for every 1,000 ft above.
Required Clearances
7" floor, 6" sides, 24" top.
DOWNLOAD PRODUCT MANUAL (PDF)
MDV20VN Natural Gas Direct Vent Thermostatic Heater 20,000 BTU Visor by Martin
FOR NATURAL GAS USE ONLY
NO ELECTRICITY IS NEEDED
Maximize your heating potential with the Martin MDV20VN. Warming larger spaces up to 538 sq. ft., this 20,000 BTU Martin Heater requires absolutely no electricity, offering a dependable heating solution for off-grid homesteads, cabins, and remote workspaces.
Key Features & Benefits
High-Capacity HeatingDesigned for large main rooms or open-concept cabins. Built-in thermostat (Hi-Low dial). Ceramic Glass Window
Enjoy the ambiance of a visible flame with the "Visio" model, adding radiant warmth and a cozy focal point. 100% Off-Grid Ready
Operates without any electrical connection, ensuring heat is available even during power outages. Safe Direct Venting
A sealed system that draws combustion air from outside and vents exhaust externally, preserving indoor air quality. Durable Design
Features a heavy-duty die-cast aluminum grill for superior heat distribution and longevity. CSA-Certified Quality.
Crucial Pre-Installation & Performance Facts
Heating Capacity
20,000 BTU (up to 538 sq. ft.)*
Wall Space Needed
Total 38" Wide area required (Unit is 26" W + Clearances).
Gas Connection
Natural Gas only. Requires technician.
High Altitude Note
Rated up to 2,000 ft. Reduce rating by 4% for every 1,000 ft above.
Required Clearances
7" floor, 6" sides, 24" top.
*Performance varies based on insulation and outside temperature.
⚠️ We recommend qualified installers and accept no liability for customer installations.
Have Questions? Chat, Call, or Text a Specialist Found a better price? We'll match or beat it! 1-844-945-3625Technical Specifications
| Specification | Details |
|---|---|
| Product Name | Martin Direct Vent Heater (Visio) |
| Manufacturer | Martin (Bismar Inc.) |
| Model Number | MDV20VN |
| Fuel Type | Natural Gas |
| Max BTU Input | 20,000 BTU/hr |
| Heating Area | Approx. 538 sq. ft. |
| Fuel Connection | Connects directly to your home's gas line. |
| Wall Thickness | 4-1/2" to 12-5/8" |
| Dimensions | 26" x 8-3/4" x 22-5/8" |
| Ignition Type | Piezo |
| Warranty | 1 Year Parts / Lifetime Chamber |
| Contents | Heater, Vent Kit, Template, Manual |
Installation & Safety Guidelines
Safety Clearances
Wall Installation
DOWNLOAD PRODUCT MANUAL (PDF) Product Videos
Best Price Guarantee!
Best Price Guarantee
You'll get the best price available at Wild Oak Trail! We'll match anyone who has it lower!
We love to chat! Give us a call and we'll see what we can do to get you the best deal!
Conditions of our 100% Price Match Guarantee:
-
Contact us to discuss the Price Match so we can look up the competitors price
-
Buy one, get one free offers and Rebates are not eligible
-
The item must be in stock on the competitors website
-
The competitor must be an online store, not a retail location
-
The website can't be a discounter or auction website ( such as eBay, overstock, etc.)
-
The company must be an Authorized Retailer of the product in question
-
The Price Match Guarantee is based on the final price of the product including shipping and taxes
Why Buy From Us
Why Buy From Wild Oak Trail?
We’re a family-run business. My Wife Hailey and I run this business with our small staff of 3 awesome people. When you shop with Wild Oak Trail, you're supporting real people, not a big corporation.
We truly care. We’re here before, during, and after your purchase. Good products and great service—that’s how we earn your trust. We see and celebrate EVERY sale that comes in!
We choose quality. If we wouldn’t use it ourselves, we won’t offer it. Our goal is to make you happy enough to tell your friends.
Thanks for supporting our family and being part of the Wild Oak Trail community!
Warranty & Support
Warranty & Peace of Mind
When you invest in a Martin Heater, you are backed by one of the strongest warranties in the heating industry. As an Authorized Martin Dealer, Wild Oak Trail ensures your purchase is fully protected by Bismar’s manufacturer coverage.
-
Lifetime replacement coverage of the combustion chamber: (against deterioration of weld integrity or defects and castings. Original Owner.)
-
1-Year Limited Warranty: 1 year coverage from defect and/or workmanship on all parts.
What You Need to Know:
-
Certified Installation: To maintain your warranty, the unit must be installed by a licensed gas technician. This ensures the venting and gas pressure are calibrated correctly for your safety.
-
Keep Your Records: Your invoice from Wild Oak Trail serves as your official proof of purchase. We recommend keeping a digital copy and recording your serial number (found on the unit's data plate) upon installation.
-
Shipping Damage: In the rare event your heater arrives with transit damage, please notify us within 48 hours of delivery so we can initiate a swift replacement or repair claim.
Support Resources
Need help before or after you buy? Our team and Martin’s technical experts have you covered:
-
Pre-Purchase Questions: Not sure about BTU sizing or clearance requirements? Chat with our experts or email us at customersupport@wildoaktrail.com
-
Installation Support: We can provide digital copies of the Installation Manual and Venting Diagrams upon request.
-
Troubleshooting: Most common issues (like pilot light adjustments) can be found in the "Maintenance" section of your manual.
Recently Viewed Items
- Description
- Best Price Guarantee!
- Why Buy From Us
- Warranty & Support
Description
🚛 Delivered free to the Lower 48 states*
Shipping to Alaska & Hawaii is extra. Please chat or call us for a quote.
Designed for large main rooms or open-concept cabins. Built-in thermostat (Hi-Low dial). Ceramic Glass Window
Enjoy the ambiance of a visible flame with the "Visio" model, adding radiant warmth and a cozy focal point. 100% Off-Grid Ready
Operates without any electrical connection, ensuring heat is available even during power outages. Safe Direct Venting
A sealed system that draws combustion air from outside and vents exhaust externally, preserving indoor air quality. Durable Design
Features a heavy-duty die-cast aluminum grill for superior heat distribution and longevity. CSA-Certified Quality.
Heating Capacity
20,000 BTU (up to 538 sq. ft.)*
Wall Space Needed
Total 38" Wide area required (Unit is 26" W + Clearances).
Gas Connection
Natural Gas only. Requires technician.
High Altitude Note
Rated up to 2,000 ft. Reduce rating by 4% for every 1,000 ft above.
Required Clearances
7" floor, 6" sides, 24" top.
DOWNLOAD PRODUCT MANUAL (PDF)
MDV20VN Natural Gas Direct Vent Thermostatic Heater 20,000 BTU Visor by Martin
FOR NATURAL GAS USE ONLY
NO ELECTRICITY IS NEEDED
Maximize your heating potential with the Martin MDV20VN. Warming larger spaces up to 538 sq. ft., this 20,000 BTU Martin Heater requires absolutely no electricity, offering a dependable heating solution for off-grid homesteads, cabins, and remote workspaces.
Key Features & Benefits
High-Capacity HeatingDesigned for large main rooms or open-concept cabins. Built-in thermostat (Hi-Low dial). Ceramic Glass Window
Enjoy the ambiance of a visible flame with the "Visio" model, adding radiant warmth and a cozy focal point. 100% Off-Grid Ready
Operates without any electrical connection, ensuring heat is available even during power outages. Safe Direct Venting
A sealed system that draws combustion air from outside and vents exhaust externally, preserving indoor air quality. Durable Design
Features a heavy-duty die-cast aluminum grill for superior heat distribution and longevity. CSA-Certified Quality.
Crucial Pre-Installation & Performance Facts
Heating Capacity
20,000 BTU (up to 538 sq. ft.)*
Wall Space Needed
Total 38" Wide area required (Unit is 26" W + Clearances).
Gas Connection
Natural Gas only. Requires technician.
High Altitude Note
Rated up to 2,000 ft. Reduce rating by 4% for every 1,000 ft above.
Required Clearances
7" floor, 6" sides, 24" top.
*Performance varies based on insulation and outside temperature.
⚠️ We recommend qualified installers and accept no liability for customer installations.
Have Questions? Chat, Call, or Text a Specialist Found a better price? We'll match or beat it! 1-844-945-3625Technical Specifications
| Specification | Details |
|---|---|
| Product Name | Martin Direct Vent Heater (Visio) |
| Manufacturer | Martin (Bismar Inc.) |
| Model Number | MDV20VN |
| Fuel Type | Natural Gas |
| Max BTU Input | 20,000 BTU/hr |
| Heating Area | Approx. 538 sq. ft. |
| Fuel Connection | Connects directly to your home's gas line. |
| Wall Thickness | 4-1/2" to 12-5/8" |
| Dimensions | 26" x 8-3/4" x 22-5/8" |
| Ignition Type | Piezo |
| Warranty | 1 Year Parts / Lifetime Chamber |
| Contents | Heater, Vent Kit, Template, Manual |
Installation & Safety Guidelines
Safety Clearances
Wall Installation
DOWNLOAD PRODUCT MANUAL (PDF)
Product Videos
Best Price Guarantee!
Best Price Guarantee
You'll get the best price available at Wild Oak Trail! We'll match anyone who has it lower!
We love to chat! Give us a call and we'll see what we can do to get you the best deal!
Conditions of our 100% Price Match Guarantee:
-
Contact us to discuss the Price Match so we can look up the competitors price
-
Buy one, get one free offers and Rebates are not eligible
-
The item must be in stock on the competitors website
-
The competitor must be an online store, not a retail location
-
The website can't be a discounter or auction website ( such as eBay, overstock, etc.)
-
The company must be an Authorized Retailer of the product in question
-
The Price Match Guarantee is based on the final price of the product including shipping and taxes
Why Buy From Us
Why Buy From Wild Oak Trail?
We’re a family-run business. My Wife Hailey and I run this business with our small staff of 3 awesome people. When you shop with Wild Oak Trail, you're supporting real people, not a big corporation.
We truly care. We’re here before, during, and after your purchase. Good products and great service—that’s how we earn your trust. We see and celebrate EVERY sale that comes in!
We choose quality. If we wouldn’t use it ourselves, we won’t offer it. Our goal is to make you happy enough to tell your friends.
Thanks for supporting our family and being part of the Wild Oak Trail community!
Warranty & Support
Warranty & Peace of Mind
When you invest in a Martin Heater, you are backed by one of the strongest warranties in the heating industry. As an Authorized Martin Dealer, Wild Oak Trail ensures your purchase is fully protected by Bismar’s manufacturer coverage.
-
Lifetime replacement coverage of the combustion chamber: (against deterioration of weld integrity or defects and castings. Original Owner.)
-
1-Year Limited Warranty: 1 year coverage from defect and/or workmanship on all parts.
What You Need to Know:
-
Certified Installation: To maintain your warranty, the unit must be installed by a licensed gas technician. This ensures the venting and gas pressure are calibrated correctly for your safety.
-
Keep Your Records: Your invoice from Wild Oak Trail serves as your official proof of purchase. We recommend keeping a digital copy and recording your serial number (found on the unit's data plate) upon installation.
-
Shipping Damage: In the rare event your heater arrives with transit damage, please notify us within 48 hours of delivery so we can initiate a swift replacement or repair claim.
Support Resources
Need help before or after you buy? Our team and Martin’s technical experts have you covered:
-
Pre-Purchase Questions: Not sure about BTU sizing or clearance requirements? Chat with our experts or email us at customersupport@wildoaktrail.com
-
Installation Support: We can provide digital copies of the Installation Manual and Venting Diagrams upon request.
-
Troubleshooting: Most common issues (like pilot light adjustments) can be found in the "Maintenance" section of your manual.