Tankless water heaters have become increasingly popular choices for homeowners due to their energy efficiency and space-saving design. Unlike traditional water heaters, tankless models do not store hot water but instead heat water on demand, providing a continuous supply of hot water. One common question that arises when installing a tankless water heater is whether it is possible to route the exhaust out a sidewall instead of through a roof vent. In this article, we will examine the feasibility and considerations of routing the exhaust of a tankless water heater out a sidewall.
Understanding the Venting System of Tankless Water Heaters
Before exploring whether the exhaust of a tankless water heater can be routed out a sidewall, it is essential to understand the venting system of these units. Tankless water heaters rely on combustion to heat water, which produces harmful byproducts such as carbon monoxide. A venting system is necessary to safely remove these byproducts from the house and ensure proper ventilation.
Typically, tankless water heaters have two types of venting systems: Direct Vent and Power Vent. Direct Vent systems utilize a concentric venting pipe that has an inner pipe for exhaust gases and an outer pipe for fresh air intake. On the other hand, Power Vent systems use a blower to force exhaust gases out through a dedicated vent pipe.
Route the Exhaust Out a Sidewall: The Possibility
It is generally possible to route the exhaust of a tankless water heater out a sidewall instead of through a roof vent. However, several factors need to be considered to ensure a safe and efficient installation. Let’s discuss these factors in detail:
- Manufacturer Guidelines: Always consult the manufacturer’s guidelines and installation manual for your specific tankless water heater model. Manufacturers provide detailed instructions on how to properly vent their units, including any limitations or recommended methods for venting through a sidewall.
- Distance from Opening to Combustible Materials: When routing the exhaust out a sidewall, it is crucial to maintain the recommended distance between the vent opening and any combustible materials such as wood, insulation, or siding. This distance varies depending on the model and should be strictly adhered to prevent fire hazards.
- Venting Material and Diameter: Selecting the appropriate vent material and diameter is vital for a safe installation. Type-approved vent pipes should be used, such as stainless steel, aluminum, or PVC, depending on the unit’s requirements. The vent diameter should also meet the manufacturer’s guidelines to ensure proper airflow and exhaust dispersion.
- Clearance from Windows and Doors: The sidewall vent must be positioned with adequate clearance from doors, windows, and any other part of the house that can allow exhaust fumes to re-enter. This prevents the potential for dangerous carbon monoxide buildup inside the living area.
- Exterior Wall Considerations: Routing the exhaust out a sidewall requires considering the exterior wall’s construction. Masonry, brick, or stucco walls require additional installation steps and potentially professional assistance to ensure proper sealing and ventilation.
Consulting a Professional
While it is possible to route the exhaust of a tankless water heater out a sidewall, the complexity and specific requirements involved call for professional guidance. Consult with a licensed HVAC specialist or plumber experienced in tankless water heater installations to assess your home’s layout, comply with local codes, and ensure the safe and efficient venting of your unit.
Routing the exhaust of a tankless water heater out a sidewall can be a viable option in many situations. However, it is crucial to carefully consider various factors, including manufacturer guidelines, distance to combustible materials, proper venting material and diameter, clearance from windows and doors, and exterior wall considerations. Consultation with a professional will help ensure a safe and efficient installation, providing hot water with peace of mind for years to come.