Short answer: Choose by the wall. A see-through fireplace sits inside a wall between two rooms and shows the fire to both. A peninsula fireplace sits at the end of a wall that stops partway into a space and shows the fire from three sides. Kingsman's MCVST42 see-through and MCVP42 peninsula put out nearly the same heat and cost about the same, so the layout of your room should make the decision.
Side-by-side
| See-through (MCVST42) | Peninsula (MCVP42) | |
|---|---|---|
| Glass sides | Two, front and back | Three, two long sides and one short end |
| Where it goes | Inside a wall dividing two rooms | At the open end of a partition or wing wall |
| Maximum input, tempered glass | 30,500 BTU | 30,250 BTU |
| Viewing area | 33 11/16 in. W x 27 3/16 in. H on each face | 33 11/16 in. W x 20 5/8 in. H on each long side; 16 in. W x 20 5/8 in. H on the end |
| Glass we offer | Tempered, or ceramic at a higher price | Tempered |
| Venting | Direct vent, 5 in. / 8 in. sloped flue, on both | |
| Ignition | Millivolt or IPI on both | |
| Media in our configurations | 8-piece oak log set | Log set (natural gas only) or glass tray with fire glass and light kit |
| Starting price | $6,935.99 | $6,804.99 |
Input ratings from the Kingsman Fireplaces United States Price List effective March 1, 2026; viewing areas from Kingsman's published product specifications. Prices as of October 2026.
Start with the wall you have
A see-through needs a full dividing wall. The unit is framed into a wall that separates two rooms, and both faces are finished. The Kingsman MCVST42 frames at 43 1/8 in. W x 51 3/8 in. H x 23 1/16 in. D, so the wall has to be deep enough to hold a firebox nearly two feet thick. Typical uses are living room to dining room, or primary bedroom to bath.
A peninsula needs a wall that ends. The unit sits at the tip of a partition, with glass on both long sides and across the short end. It works where a short wall separates a kitchen from a family room, or where three spaces meet. Framing dimensions for the MCVP42 come from the Kingsman manual; send us your wall plan and we will confirm them.
What you see
The two are the same width on their main faces, but the see-through's viewing area is taller: 27 3/16 in. against 20 5/8 in. It reads like a window of fire between two rooms. The peninsula's glass is lower, but the fire is also visible from someone standing off the end of the wall. If people will mostly sit facing the fireplace in two rooms, the see-through gives each room a taller picture. If people will move around it, the peninsula is seen from more of the space.
Heat
With tempered glass the two are within 250 BTU of each other. In both cases that output is shared across more than one space, and these fireplaces are for supplemental heat, not a primary heat source.
Kingsman also builds both models with ceramic glass, which passes more radiant heat into the room. We list the see-through in ceramic, where it adds roughly $2,400 to the price. If you want the peninsula in ceramic, ask us and we will quote it. For help judging how much heat your rooms need, see our sizing guide.
Venting: the part to solve first
Both units use 5 in. / 8 in. direct vent pipe, and both usually sit in the interior of the house rather than on an outside wall. That means the vent has to travel up and out through the roof, or up and across to an exterior wall.
For the peninsula, Kingsman's manual requires the horizontal vent to sit at least 55 in. above the base on natural gas and 67 in. on propane before it runs sideways, plus 1/4 in. of rise per foot. Take the see-through's figures from its own manual. In either case, settle the vent route with your builder before the wall is framed. It is the most common thing buyers of multi-sided fireplaces discover too late.
Finishing and cost
The fireplaces themselves are priced within about $130 of each other. The installed cost is driven more by finishing: a see-through has two faces to tile or clad, and a peninsula has three faces plus the exposed end of the wall. Budget for the extra finish work and for an installer who has done multi-sided units before. Our guide to reading a gas fireplace quote explains what to look for.
Which should you choose?
- Choose the see-through if you have, or are building, a full wall between two rooms and want each room to have a large view of the fire. Read our MCVST42 see-through guide or see the product page.
- Choose the peninsula if your wall stops partway into an open plan and you want the fire visible from the surrounding space. See the MCVP42 product page.
- Choose neither if the fireplace is going against a single solid wall. A one-sided unit costs far less and is simpler to vent: browse our direct vent gas fireplaces.
One shipping note: we cannot currently sell or ship the MCVP42 peninsula to New York State.
Frequently asked questions
What is the difference between a see-through and a peninsula fireplace?
A see-through has glass on two opposite sides and is built into a wall between two rooms. A peninsula has glass on three sides and is built into the end of a wall.
Which puts out more heat?
They are nearly identical: 30,500 BTU for the tempered-glass see-through and 30,250 BTU for the tempered-glass peninsula.
Can either one go on an outside wall?
They are designed for interior walls where more than one side is visible. For an outside wall, a single-sided fireplace is the better fit.
Do they need special venting?
Both use 5 in. / 8 in. direct vent pipe. Because they usually sit in the middle of the house, the vent route needs to be planned before framing.
Not sure which suits your layout? Send us a sketch or photo of the wall and we will tell you which one frames and vents cleanly. Call 877-879-9191 or contact us.
Sources: Kingsman Fireplaces United States Price List effective March 1, 2026, Kingsman's published product specifications, and the Kingsman MCVP42 installation manual. Codes vary by jurisdiction. This article does not replace the manufacturer instructions or a licensed installer.