Answering the buyer’s search, these evaporative cooler heat plug options help seal drafts and conserve energy. The top picks are best for homeowners seeking easy, secure plugs or covers to fit common cooler sizes. This guide highlights five compatible plugs or covers, who they’re best for, and practical trade-offs.
| Product | Size Fit | Best For | Why It Stands Out |
|---|---|---|---|
| Evaporative Cooler Heat Plug Cover (20 in. x 20 in. x 4 in.) | 20″ x 20″ x 4″ | Large, draft-sensitive spaces | Durable polyester, secure friction seal |
| Evaporative Cooler Heat Plug Cover (18 in. x 18 in. x 4 in.) | 18″ x 18″ x 4″ | Medium-size coolers | Flexible, weather-resistant coating |
| Evaporative Cooler Heat Plug Cover (14 in. x 14 in. x 4 in.) | 14″ x 14″ x 4″ | Smaller rooms or windows | Compact fit with secure seal |
| 6017081 Evaporative Cooler Drain Plug Compatible with Hessaire | Standard drain plug | Hessaire models | Restores water containment with replacement plug |
| 2PK 6017081 Rubber Drain Plug Compatible with Hessaire Evaporative Cooler | 2-pack replacement | Backup plugs, spare parts | Tethered cap and tight seal for leakage prevention |
Evaporative Cooler Heat Plug Cover — 20 in. x 20 in. x 4 in.
Product: Evaporative Cooler Heat Plug Cover (20 in. x 20 in. x 4 in.)
Brand: Mr. Bar-B-Q
Key features: Durable polyester material over a polyurethane foam pad for a flexible but firm fit; weather-resistant polyurethane coating; friction fit for a secure seal; prevents drafts and heat loss for improved comfort and energy savings.
Best for: Homeowners with large cooler openings who want a secure, weatherproof seal. The thick fits help reduce drafts in larger rooms or spaces with higher heat exchange.
Why selected: The large size accommodates broader cooler openings and the friction seal provides a dependable barrier against air leaks.
Caution/limitation: Installation depends on an accurate size match; a poor match may reduce sealing effectiveness.
Evaporative Cooler Heat Plug Cover — 18 in. x 18 in. x 4 in.
Product: Evaporative Cooler Heat Plug Cover (18 in. x 18 in. x 4 in.)
Brand: Mr. Bar-B-Q
Key features: Durable polyester over a polyurethane foam pad; friction fit; weather-resistant coating; helps prevent drafts and heat loss.
Best for: Medium-sized coolers and rooms where a balance of size and seal strength is preferred.
Why selected: The 18″ size provides a versatile option that fits many common cooler models without excessive overhang.
Caution/limitation: May not seal perfectly on non-standard openings; verify dimensions before purchase.
Evaporative Cooler Heat Plug Cover — 14 in. x 14 in. x 4 in.
Product: Evaporative Cooler Heat Plug Cover (14 in. x 14 in. x 4 in.)
Brand: Mr. Bar-B-Q
Key features: Durable polyester and polyurethane foam pad; friction fit; weather-resistant coating; prevents drafts and heat loss.
Best for: Smaller openings or compact spaces where a snug, snug-fit cover is ideal.
Why selected: The smallest plug cover in the set is well-suited for tight installations while maintaining an effective seal.
Caution/limitation: Suitable mainly for smaller openings; consider larger options if measured dimensions exceed 14 inches.
6017081 Evaporative Cooler Drain Plug Compatible with Hessaire
Product: 6017081 Evaporative Cooler Drain Plug Compatible with Hessaire
Brand: Generic
Key features: Drain plug part numbers 6017081; compatible with Hessaire models MC18M, MC18V, MC26A, MC37M, MC37A, MC37V, MC61M, MC61V, MC92V; restores water containment and cooler function.
Best for: Hessaire cooler owners needing an original-style replacement to restore leak-free operation.
Why selected: Direct compatibility with popular Hessaire models makes it a reliable replacement option.
Caution/limitation: Ensure your model number matches; not all Hessaire variants may be covered.
2PK 6017081 Rubber Drain Plug Compatible with Hessaire Evaporative Cooler
Product: 2PK 6017081 Rubber Drain Plug Compatible with Hessaire Evaporative Cooler
Brand: Generic
Key features: 2 white rubber drain plugs with tethered cap; triple-snap design for tight sealing; compatible with MC18M, MC37M, MC37V, MC61M, MC61V models (not fit MC91M, MC92V pre-2020).
Best for: Users needing a spare plug with a tethered cap to avoid loss while in use.
Why selected: The tethered cap and secure sealing design help prevent leaks during operation.
Caution/limitation: Some Hessaire models manufactured before 2020 may not be compatible; verify model number.
2 Pack 1″ Cooler Drain Plug Replacement for Coleman Xtreme
Product: 2 Pack 1″ Cooler Drain Plug Replacement for Coleman Xtreme
Brand: telehybrid
Key features: Replacement for Coleman coolers; several compatible models listed; durable, leak-proof design; ensures smooth water drainage.
Best for: Coleman cooler owners needing a universal 1″ shaft drain plug kit.
Why selected: Compatibility with a wide range of Coleman models provides flexibility and practical value.
Caution/limitation: Verify model compatibility using the bottom-of-cooler model number before purchasing.
2 PCS Drain Plug Caps Replacement for Igloo 25-70 Qt
Product: 2 PCS Drain Plug Caps Replacement for Igloo 25-70 Qt
Brand: Acxetx
Key features: Includes 2 white drain plug caps with tether; fits standard drain holes; ABS material for durability.
Best for: Igloo cooler owners seeking a simple cap replacement to prevent leaks.
Why selected: Tethered caps help prevent loss and improve sealing reliability during operation.
Caution/limitation: Designed for Igloo 25-70 quart models; other sizes may require different caps.
Omoojee 2 Packs 1.5″ Shaft Drain Plug Kit
Product: Omoojee 2 Packs 1.5″ Shaft Length Cooler Drain Plug Replacement
Brand: Omoojee
Key features: Designed for 50, 58, and 82 Quart Xtreme coolers; complete kit includes plugs, covers, and gaskets; precise sizing for leak prevention.
Best for: Coleman Xtreme and similar models needing a full drain plug kit for maintenance or replacement.
Why selected: A complete kit reduces the need for multiple parts purchases and ensures a full drain path is sealed.
Caution/limitation: Verify model compatibility and shaft length to ensure a proper fit.
Buying Guide: Key Considerations For Evaporative Cooler Heat Plugs and Drain Plugs
- Fit and size: Measure your cooler opening or drain hole. Choose plugs or covers that match the exact dimensions (e.g., 14″, 18″, or 20″ covers; 1″ to 1.5″ shaft plugs).
- Seal quality: Look for friction-fit or tethered-cap designs that reduce leaks and prevent loss of cold air or water containment during operation.
- Material durability: Favor polyurethane-coated polyester and ABS or rubber plugs for long-term wear and weather resistance.
- Model compatibility: Some plugs are model-specific (Hessaire, Coleman, Igloo). Confirm model numbers before purchasing.
- Replacement strategy: Consider buying a small bundle (2-pack, 4-pack) for backups and ongoing maintenance.
- Installation ease: Choose designs that install quickly without tools, especially if you want seasonal sealing done by a homeowner.
Frequently Asked Questions
- What is the purpose of an evaporative cooler heat plug cover?
Answer: To seal openings and prevent drafts and heat loss, improving energy efficiency. - Are these plugs universal for all evaporative coolers?
Answer: No—many are model-specific. Always check your cooler’s model number and dimensions before buying. - Do heat plug covers affect cooling performance?
Answer: They help maintain consistent internal temperatures by reducing unwanted air exchange, which can support energy savings. - When should I replace a drain plug?
Answer: If you notice leaks, cracks, or hardening material, replace with a compatible plug kit to restore containment. - What materials offer the best durability?
Answer: Polyester with polyurethane coating for covers; ABS or rubber for plugs, as these resist weathering and wear. - Can I mix brands for plugs and covers?
Answer: Yes, as long as the dimensions and model compatibility match your cooler’s specifications.
