OWNER’S MANUAL

VENTING INSTALLATION

Continued

3.Lower the support box through the hole in the roof until the bottom of the box extends at least 2" below the ceiling (see Figure 23). Align the support box vertically and horizontally using a level. Temporarily tack the support box in place through the inside walls and into the roof sheathing.

4.Using tin snips, cut the support box from the top corners down to the roofline and fold the resulting flaps over the roof sheathing (see Figure 24). Apply a bead of non-hardening mastic around the top edges of the support box to make a seal between the box and the roof. Nail in place with roofing nails. Remove any combustible material that might be in- side of the support box.

5.Complete the cathedral ceiling instal- lation by following the same proce- dures outlined in steps 2 through 7 for Flat Ceiling Installation, page 12.

Level

Cathedral ceiling support box

2" minimum below finished ceiling

Vertical Termination Configurations

Figures 25 through 28 show four different configurations for vertical termination. All connections must be sealed with high temperature silicone sealant as specified in the second warning statement on page 7.

Venting with Two 90° Elbows

Vertical (V)

Horizontal (H1) +

 

Horizontal (H2)

5' min.

2' max.

6' min.

4' max.

7' min.

6' max.

8' min.

8' max.

20' max.

8' max.

Note: Restrictor must be installed in all vertical installations.

Figure 25 - Vertical Rigid Venting Configuration Using Two 90° Elbows with Two

Horizontal Runs

Cut hole 1/8" larger than support box when projected onto roofline

Figure 23 - Cathedral Ceiling Support Box Installation

Note: Restrictor must be installed in all vertical installations.

Venting with One 90° Elbow

Vertical (V)

Horizontal (H)

5' min.

2' max.

6' min.

4' max.

7' min.

6' max.

8' min.

8' max.

20' max.

8' max.

Non-hardening Mastic under all edges of support box before nailing

Figure 24 - Installed Cathedral Ceiling

Figure 26 - Vertical Rigid Venting Configuration Using One 90° Elbow

 

Support Box

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Desa CDV34NA, CDV34PA installation manual Vertical Termination Configurations, Venting with One 90 Elbow

CDV34PA, CDV34NA specifications

Desa CDV34NA and CDV34PA are two prominent models in the Desa vent-free gas fireplace series, renowned for their efficiency, craftsmanship, and modern design. These fireplaces offer an ambient warmth while combining style with practicality, making them a popular choice for homeowners looking to enhance their living spaces.

One of the key features of the CDV34NA and CDV34PA is the vent-free technology. This innovative design allows for the direct burning of gas without the necessity of a chimney or venting system. As a result, these fireplaces can be installed in various locations within the home, providing flexibility that traditional fireplaces cannot match. The absence of a flue system also means that no heat is lost during the exhaust process, allowing for maximum energy efficiency.

Both models are equipped with advanced safety features. They include an Oxygen Depletion Sensor (ODS) that automatically shuts off the unit if oxygen levels fall below a safe threshold. This technology not only ensures the safety of users but also enhances peace of mind while operating the fireplace. Additionally, the CDV34 series features a built-in thermocouple that regulates the temperature, providing an added layer of safety by preventing overheating.

When it comes to aesthetics, the CDV34NA and CDV34PA do not disappoint. They feature a modern, sleek design that complements a variety of interior decors. Available in stylish finishes, these units can seamlessly blend into contemporary homes or traditional settings. The large viewing windows provide a captivating view of the flames, creating an inviting ambiance ideal for any gathering.

Performance-wise, both models deliver impressive heating capabilities. With adjustable heat output settings, users can customize the warmth to suit their preferences. The units operate quietly, enhancing the overall comfort of the environment without disruptive fan noise. Additionally, the CDV34NA model runs on natural gas, while the CDV34PA uses propane, providing options based on the homeowner's available gas supply.

In conclusion, the Desa CDV34NA and CDV34PA are exceptional options for those seeking a versatile and stylish heating solution. With their vent-free technology, enhanced safety features, and elegant design, these fireplaces are perfect for adding warmth and character to any indoor space. Whether for new constructions or renovations, these models offer the right blend of function and form for today's discerning homeowners.