If you’re selecting a side vent water heater, you’re seeking dependable venting solutions that ensure safe exhaust and compatibility with your setup. This guide highlights five strong choices, suitable for different needs—from compact, high-efficiency systems to durable stainless steel configurations. Ideal buyers include homeowners upgrading venting, contractors working on new installs, and property managers seeking reliable, install-friendly options. The table below compares key notes to help you decide quickly.
| Product | Best For | Vent Type | Notes |
|---|---|---|---|
| Rheem AS40665 ProTech Vent Hood Draft Hood | Residential installs needing flexible 3″ or 4″ venting | Draft hood with 3″ or 4″ venting | Aids exhaust management and safe updraft |
| SP20285 Horizontal Vent Termination Kit (2″) | Outside-wall installations with 2″ piping | Horizontal termination for 2″ pipes | Conceals intake/exhaust; includes screws |
| Rheem RTG20280-1 Tankless Horizontal Vent Kit | Durable, long-term installations | Horizontal vent kit with wall plate | Includes 12″ wall plate and 94° elbow |
| Thermomate 3″ Vent Pipe Kit | Universal fit for most 3″ gas heaters | 3″ vent components | Includes hood, elbow, pipes, and wall thimble |
| SP20285 Horizontal Vent Termination Kit (2″) | Compact, reliable 2″ venting kits | Horizontal termination for 2″ pipes | All-in-one kit; includes screws |
Rheem AS40665 ProTech Vent Hood Draft Hood, 3 in. & 4 in. Vent
The Rheem ProTech draft hood is designed to connect a water heater to a venting system with flexibility for both 3-inch and 4-inch venting. It emphasizes proper exhaust management and safe venting through its draft hood connection and combustion gas assistance features. This makes it a solid choice for homes with variable venting layouts where 3″ or 4″ piping may be used. Best for installations that require adaptable venting paths and reliable exhaust control. A potential limitation is that it focuses on draft hood functionality rather than broader venting system components.
SP20285 Horizontal Vent Termination Kit for Tankless Gas Water Heater (2 inch)
This kit is designed to vent high-efficiency fossil-fuel appliances and is suitable for 2-inch pipes, for horizontal or vertical installations. It helps preserve safe performance while improving exterior aesthetics by concealing pipework. Best for exterior wall installations where 2″ piping is used and aesthetics matter. A caution: verify compatibility with your appliance’s pipe size before purchase, as it is specifically for 2-inch systems.
Rheem RTG20280-1 Tankless Horizontal Vent Termination Kit
Rheem’s horizontal termination kit emphasizes durability with stainless steel components and includes a complete wall plate assembly for secure mounting. The included 94-degree angled elbow supports proper venting configuration. Best for long-term, corrosion-resistant installations where a robust wall penetration is required. Limitations include standard 12-inch plate sizing which may require additional adjustments for tight spaces.
Thermomate 3″ Vent Pipe Kit
The Thermomate 3″ Vent Pipe Kit offers a universal fit for most standard 3-inch gas water heaters and includes a termination hood, 90° elbow, vent pipes, and a wall thimble. It focuses on high-efficiency exhaust venting for residential tankless heaters, supporting reliable operation and safer indoor installations. Choose this if you need a complete 3-inch kit in one package. A limitation is its focus on horizontal venting; verify fit for vertical configurations.
SP20285 Horizontal Vent Termination Kit With Screws (2 In)
This kit includes a horizontal vent termination kit for 2-inch pipes, designed to vent high-efficiency fossil-fuel appliances and conceal intake/exhaust pipework. It provides an all-in-one solution with screws included, simplifying installation and reducing the need for extra parts. Best for 2″ installations where aesthetics and a complete kit are priorities. Caution: ensure your system uses 2″ piping, as larger sizes are not supported by this kit.
Buying Guide: Key Considerations for Side Vent Water Heaters
- Vent compatibility: Confirm the diameter required by your water heater (2″ vs 3″ or 4″) and whether you need horizontal or vertical venting.
- Material durability: Stainless steel components offer superior corrosion resistance, especially in outdoor or humid environments.
- Installation ease: Look for complete kits that include wall plates, elbows, and thimbles to minimize additional purchases.
- Aesthetics on exteriors: Some termination kits conceal pipes for curb appeal on exterior walls.
- Safety and code compliance: Ensure the kit is designed for high-efficiency fossil-fuel appliances and adheres to local venting codes.
- Versatility: If you anticipate future changes, choose adaptable components that support multiple vent sizes or configurations.
Frequently Asked Questions
- What does a vent hood do in a water heater venting system?
It helps direct combustion gases into the vent and prevents backdrafts, contributing to safer operation.
- Do I need a complete kit or can I mix components?
For most installations, a complete kit reduces mismatch risk and simplifies installation.
- Can I use 2″ venting for all tankless heaters?
No. Some units require 3″ or 4″ venting. Verify your heater’s specifications before choosing a kit.
- Is stainless steel always better for vent components?
Stainless steel offers better corrosion resistance, especially for outdoor or humid environments, but may cost more.
- What should I check before purchasing a horizontal termination kit?
Ensure pipe diameter, installation location (outside wall vs. interior), and compatibility with your heater model.
- Are these kits compatible with all brands?
Most are designed for common 2″ or 3″ gas water heaters but always verify compatibility with your specific model.