Answering the need for safe, outdoor-friendly venting, this guide reviews five vent termination and heating options designed for outside walls and outdoor setups. The selections are best for homeowners seeking reliable venting hardware for gas or electric tankless systems, RV setups, and exterior installations. Read on to compare which kit or heater best suits your climate, space, and venting requirements. The table below highlights key details to help you choose quickly.
| Product | Best For | Key Benefit |
|---|---|---|
| SP20285 Horizontal Vent Termination Kit (2 inch) – Wosijm Store | Gas or high-efficiency outdoor installations | Low-profile vent concealment |
| SP20285 Horizontal Vent Termination Kit With Screws – 2 Inch | DIY outdoor wall venting | Conceals intake/exhaust and includes screws |
| Rheem RTG20280-1 Tankless Horizontal Vent Termination Kit | Durable exterior venting | Stainless steel components with wall plate |
| FOGATTI InstaShower 9 Pro RV Tankless Water Heater | RV and camp setups | On-demand hot water with 66,000 BTU |
| APUS 27kW Electric Tankless Water Heater | Electric, whole-home immediate hot water | Self-modulating, high thermal efficiency |
SP20285 Horizontal Vent Termination Kit for Tankless Gas Water Heater
The SP20285 kit is designed to vent high-efficiency fossil-fuel appliances, including tankless water heaters and furnaces. It offers a low-profile finish that conceals both intake and exhaust piping, improving exterior wall aesthetics. The kit is suitable for 2-inch PVC and ABS pipes and centers 4 inches apart. It supports horizontal through-wall or vertical roof installations, making it versatile for outdoor setups. Best for homeowners who want a streamlined exterior look and straightforward installation for 2-inch piping. A potential limitation is its specific pipe size requirement—confirm 2-inch PVC/ABS before purchasing.
SP20285 Horizontal Vent Termination Kit With Screws for Tankless Gas Water Heater
This kit includes the SP20285 horizontal vent termination and screws, designed to vent high-efficiency fossil-fuel appliances while concealing intake and exhaust pipework for a neat exterior. The included components aim to simplify installation and reduce the need for extra fittings. Best for outdoor wall installations where aesthetics matter. A caution is that it is tailored for 2-inch pipes, so verify pipe size before purchase.
Rheem RTG20280-1 Tankless Horizontal Vent Termination Kit
Rheem’s RTG20280-1 kit features durable stainless-steel components and a complete wall plate assembly with mounting screws for secure, exterior installation. An angled 94-degree elbow is included to help configure proper venting. This option is best for environments where corrosion resistance and a robust wall plate improve long-term outdoor performance. Limitation: data does not specify compatibility with all tankless models, so confirm venting compatibility with your unit.
FOGATTI InstaShower 9 Pro RV Tankless Water Heater
FOGATTI InstaShower 9 Pro is an RV-rated tankless unit featuring a built-in mixing tank and a 66,000 BTU capacity. It is designed for easy retrofit with a 15″x15″ door and is suitable for high-altitude use. Best for RV families and campers who need on-demand hot water in mobile or limited-space environments. A limitation is that its RV-specific design may not be ideal for stationary residential use if you need high static water pressure or plumbing consolidation.
APUS 27kW Electric Tankless Water Heater
The APUS 27kW electric tankless heater delivers up to 6.5 GPM and a self-modulating 240V design for whole-home hot water. It features a slim wall-mounted profile and a wide operating temperature range of 86–140°F. Best for homes with compatible electrical service seeking rapid, on-demand hot water. A caution is that electrical compatibility and panel capacity are essential—verify home electrical readiness before installation.
Buying Guide: Key Purchase Considerations
- Vent type and compatibility: Confirm pipe size (2-inch for some kits) and whether horizontal or vertical installation is supported by your unit.
- Outdoor durability: Choose stainless steel or corrosion-resistant components for exterior use and consider environmental exposure.
- Installation kit contents: Look for complete kits with wall plates, elbows, screws, and mounting hardware to simplify setup.
- Unit compatibility: Ensure the vent termination kit matches your tankless model’s vent type and inlet/outlet arrangement.
- Application fit: RV-specific units differ from residential outdoor vent kits. Select based on whether you need stationary home use or vehicle/mobile use.
Frequently Asked Questions
- What is a tankless water heater external vent kit used for?
– It provides a safe, efficient path for exhaust and intake vents when the unit is installed on an outside wall. - Do these kits fit all 2-inch vent pipes?
– Many are sized for 2-inch PVC/ABS, but always verify pipe size before purchasing. - Is stainless steel required for outdoor venting?
– Stainless steel components improve durability and corrosion resistance in outdoor environments. - Can I use an RV heater at home?
– RV units are designed for mobile setups and may not be ideal for stationary residential use; choose accordingly. - Do I need additional parts for installation?
– Some kits include all required accessories; others may require extra fittings depending on your configuration. - What should I check before installing an electric tankless heater outdoors?
– Confirm electrical service capacity and weatherproofing requirements for outdoor installation.