Martin Propane Direct Vent Heater MDV20VP – 20,000 BTU | Off‑Grid Wall‑Mount Heating Solution
Questions about this product
Questions about this product
What room size will each model handle?
538 Square Feet
Do they need electricity and will they run during an outage?
No power required. They use a standing pilot with a piezo ignitor and a mechanical control, so they keep heating with the lights out.
What clearances and mounting height do I need?
Sides 6 in. Above 24 in. From finished floor 7 in to the bottom of the heater. Rear clearance: MDV8 is 25/32 in, MDV12/MDV20 are 1-3/16 in. Use the included wall template. Keep the exterior vent cap at least 24 in from any outside intersecting wall.
What comes in the vent kit and what wall thicknesses are supported?
Vent kit includes: external air-intake tube with enamel hood, internal flue-gas tube, indoor and outdoor mounting plates, plus a wall thimble on MDV12 and MDV20, with threaded rod and adjusting nut. Approved wall thickness is 4-1/2 in to 12-5/8 in. Thicker walls aren’t supported by the manual.
Can I convert propane to natural gas, and what about high-elevation derate?
These units are not convertible. Order the model for your gas type. Above 2,000 ft, reduce input by 4 percent per 1,000 ft.
Delivery and shipping
Delivery and shipping
Orders are typically processed within 1 to 2 business days from the time of purchase, excluding holidays and weekends.
Shipping times and cost will vary depending on the product and your location.
On average:
Ontario and Quebec: 2 to 5 business days
Western Canada: 4 to 7 business days
Atlantic provinces: 4 to 8 business days
Northern or remote areas: Contact us to confirm
Martin Propane Direct Vent Heater MDV20VP – 20,000 BTU | Off‑Grid W...
Description
For larger off-grid spaces, the Martin MDV20VP Propane Direct Vent Wall Heater delivers twice the heating power with the same sleek design and no electricity required. Ideal for cabins, workshops, remote homes, or backup heat, this 20,000 BTU unit pairs performance with style.
Designed with a visible flame through its ceramic glass window, a built-in thermostat, and a durable die-cast aluminum body, this wall-mounted heater warms up to 538 ft² efficiently while maintaining clean, breathable indoor air through its direct vent system.
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Key Features
• 20,000 BTU Heating Power – Comfortably warms up to 538 ft²
• No Power Needed – Operates independently of electricity for off-grid reliability
• Direct Vent Safety – Clean, safe indoor air with external combustion and exhaust
• Built-In Thermostat – Automatically adjusts flame height for consistent room temperature
• Ceramic Glass Flame Window – Offers visual warmth and flame ambiance
• Heavy-Duty Die-Cast Construction – Built to last in rugged environments
• Clean Wall Protection – Rear of the unit remains cool to avoid wall discoloration
• Simple Installation – Fits wall thicknesses from 4.5” to 12.63”
• Low Maintenance – Minimal upkeep with efficient, clean combustion
• Larger Footprint – 26” (W) x 8 1/4” (D) x 22 5/8” (H) | Weight: 47.4 lbs
• Color – Sleek silver and black
• Warranty – 1-Year Limited Manufacturer’s Warranty
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Why Choose This Heater?
✔ Ideal for Off-Grid Living – Perfect for larger cabins, workshops, or off-grid homes that need more heat.
✔ Wall-Mounted Convenience – No bulky floor unit; just clean, efficient wall placement.
✔ Certified & Safe – CSA-certified for use in Canada and the US, with safety-focused direct venting.
✔ Built to Impress – Ceramic viewing window and elegant finish enhance the look of any room.
✔ Set It & Forget It – With its built-in thermostat, the MDV20VP adjusts automatically to your desired comfort level.
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Lifestyle Use
Whether you’re heating a lakeside retreat or adding comfort to a workshop without power access, the Martin MDV20VP provides efficient, powerful heating with no compromise on style. Its large BTU output ensures comfort even in colder climates, while its modern design blends seamlessly into off-grid living spaces.
To serve our customers across Canada, whether you're in a major city or completely off the grid, many of our products are shipped via freight delivery to ensure safe and efficient transport. Depending on your location and the item, you’ll have the option to pick up from a nearby warehouse terminal or request home delivery.
Free Terminal Pickup on Most Large Items
Most large items we sell, including appliances, solar kits, and other freight-shipped products, include free shipping to your closest warehouse terminal.
Your order will be delivered to the nearest terminal based on your location, where you can pick it up at your convenience.
Need it delivered to your home or cabin? We can set that up for you. There is a small additional fee for residential delivery.
Remote and Hard-to-Reach Locations
If you live in a remote area or outside standard freight zones, please contact us before placing your order.
Some rural locations may require additional charges or special delivery arrangements. We'll confirm everything with our freight partner before shipping.
Local Pickup Options Across Canada
We work with warehouse terminals in every province, so many of our products can be picked up locally to save on shipping costs.
Not all items are eligible, so if you're unsure at checkout, give us a call or send us an email and we'll confirm the best option for your area.
Shipping Times and Order Processing
Orders are typically processed within 1 to 3 business days from the time of purchase, excluding holidays and weekends.
Shipping times will vary depending on the product and your location. On average:
- Ontario and Quebec: 2 to 5 business days
- Western Canada: 4 to 7 business days
- Atlantic provinces: 4 to 8 business days
- Northern or remote areas: Contact us to confirm
We will provide tracking details when available once your order has shipped.
Receiving Freight Shipments
For large freight deliveries, you will receive a call from the carrier or your nearest terminal when your order is ready for pickup or delivery.
Important: Always inspect your shipment before signing any paperwork.
If the box or pallet is damaged:
- Do not sign the Bill of Lading (BOL) as "received in good condition"
- Instead, note the damage clearly on the BOL
- Or refuse the shipment if damage is significant
If no damage is recorded and the shipment is accepted, the freight carrier will consider it delivered in perfect condition. In that case, we cannot issue a refund or replacement. This is a strict freight carrier policy and applies to all deliveries.
Damaged or Missing Items
If there’s an issue with your shipment (whether it’s damage, missing parts, or anything unusual) please contact us within 48 hours of receiving the item. Be sure to include photos whenever possible, as these are often required to file a freight claim on your behalf. If the item was shipped to a terminal, it must be picked up within 48 hours or a $45/day storage fee will apply.
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. Shipping costs back to Canadian Off Grid are the responsibility of the customer and 15% restocking fee will apply.
To start a return, you can contact us atryan@canadianoffgriddepot.com. If your return is accepted, we’ll contact you to discuss options, as well as instructions on how and where to return your item. Items sent back to us without first requesting a return will not be accepted.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.