Vented Logs (for looks)   VS      Ventless (provide heat)

Vented gas logs offer a full, authentic-looking flame presentation with plenty of ambiance while Ventless gas logs provide a reliable and efficient heating source.

Vented Gas Logs :

If you’re more concerned about ambiance and aesthetics than heat, then a Vented gas log set is the best choice for you.

Vented gas logs are the best way to achieve a realistic-looking fire. They are designed for use in a traditional wood-burning fireplace and are a safe, mess-free alternative to real wood logs. Vented gas logs feature a very full and natural-looking flame presentation and typically come with an expansive ember bed to mimic the warm glow of wood embers in a dying fire. The main drawback with Vented gas logs has to do with efficiency. Just like real wood logs, Vented logs must be used with a functional chimney and require the chimney damper to stay open at all times to prevent the buildup of hot air, gas, and combustion byproducts in the home.

Since the damper stays open, most of the heat produced is lost up the chimney. For this reason, Vented gas logs are primarily sold as decorative centerpieces rather than as supplemental heat sources.

Ventless Gas Logs : 

If heat is what you’re after, then a Ventless gas log set is the way to go. Ventless gas logs are extremely efficient and will provide an exceptional amount of heat for your room. They don’t require a chimney or venting, allowing all of the heat produced to circulate back into the room, rather than escaping up the chimney.

Ventless gas logs are designed to achieve a clean, smokeless flame. They burn so hotly that nearly 100% of the fuel is combusted, allowing them to operate safely without a chimney. Ventless gas logs can achieve a realistic-looking fire, but the flames often appear blue and may not be as large or as authentic as a Vented log set can produce.

The way Ventless logs are arranged also affects the appearance of the fire. They have to be stacked around the gas outlets to prevent flames from coming into direct contact with the logs. If flames do touch the logs, carbon monoxide can be produced. Arranging the logs this way can make the fire look like it’s shooting straight up, rather than engulfing the logs like a traditional fire. Since combustion air isn’t able to escape through a chimney, Ventless gas log sets may give off an odor when burning and will intensify any odors already present in the home, such as air fresheners, incense, pet dander, and dust. Ventless appliances also produce water vapor during combustion, which can lead to excess moisture buildup throughout the living space. As an additional safeguard, Ventless gas logs come equipped with a built-in Oxygen Depletion Sensor (ODS) to monitor the amount of oxygen present in the room. If oxygen gets too low, the ODS automatically shuts off the gas supply to the burner.

1. Electronic IPI (Intermittent Pilot Ignition)

·         How it Works: Uses an electronic spark to ignite the pilot light only when there is a "call for heat".

·         Pros: Highly energy-efficient as the pilot doesn't run 24/7; often features battery backups for power outages.

·         Cons: Requires an external power source (standard outlet) and uses more complex control boards.

·         Best For: Users seeking modern convenience and lower gas bills. 

2. Manual Control

·         How it Works: Requires physical operation, such as turning a knob or using a key valve to ignite the burner.

·         Pros: Most affordable option; reliable with no electronic parts to fail.

·         Cons: No remote control or thermostat compatibility; requires physical proximity to adjust.

·         Best For: Simple, budget-friendly setups where automation isn't needed. 

3. Millivolt Control 

·         How it Works: Uses a thermopile to generate a small electrical current from a standing pilot light, which powers the gas valve.

·         Pros: Works without household electricity; highly versatile and compatible with most remotes and wall switches.

·         Cons: Standing pilot light consumes gas continuously; lacks the precision of modern electronic systems.

·         Best For: Areas prone to power outages and those wanting varied remote options. 

4. Thermostat Control

·         How it Works: Automatically cycles the unit on and off (or modulates the flame) to maintain a specific room temperature.

·         Pros: Hands-off comfort; prevents the room from overheating.

·         Cons: Often more expensive than basic on/off controls; may require a visible sensor in the room.

·         Best For: Primary heating sources or rooms used frequently for long periods. 

5. Variable Control (Hi/Lo)

·         How it Works: Allows the user to adjust the flame height and heat output incrementally, usually via a remote or motor-driven valve.

·         Pros: Offers the most aesthetic control over the "look" of the fire.

·         Cons: Higher cost; frequently requires specific remote kits to function.

·         Best For: Users who prioritize ambiance and visual customization. 

Summary Comparison

Control Type             Pilot Light                  Power Needed?             Remote Capable?             Flame Adj.?                 Energy Efficiency

Manual                   Manual Spark            No                              No                                Manual Knob              Moderate

Millivolt                  Standing 24/7            No                              Yes                               Manual Knob              Low (due to pilot)

Electronic (IPI)       Intermittent                Yes (Battery)              Yes                               Often Yes                    High

Thermostat            Varies                         Usually                      Yes (built-in)                 Varies                          High

Variable                  Varies                        Yes (if remote)           Yes (built-in)                 Remote                        High