Aqua-Hot

About Aqua-Hot: The Pioneer of RV Hydronic Heating

Founded in 1984 by RV enthusiast Harold "Hap" Enander in Frederick, Colorado, Aqua-Hot set out to solve one of the most persistent frustrations in RV living: uneven, noisy, and inefficient heat. The result was a breakthrough — the first hydronic heating system ever engineered specifically for recreational vehicles. Decades later, Aqua-Hot remains the undisputed market leader in this category, trusted by luxury coach manufacturers and everyday RVers alike.

At the heart of every Aqua-Hot system is an elegantly simple principle: a specially formulated antifreeze fluid is heated in a compact boiler unit, then circulated through a closed loop of tubing to heat exchangers placed throughout the RV. Aqua-Hot heating delivers quiet, moist, and evenly distributed warmth — up to five independently controlled heat zones — with no hot spots, no cold corners, and no dry, blasting forced air. The same closed-loop system also provides continuous on-demand hot water without the need for a storage tank.

Multiple Comfort Functions from One Compact Unit

What makes Aqua-Hot systems especially compelling is how much they accomplish from a single, space-efficient package. Depending on the model, a single Aqua-Hot unit can deliver interior zone heating, bay heating to protect pipes and holding tanks from freezing, tankless on-demand hot water, and even engine preheating — reducing cold-start wear and tear on the motorhome's drivetrain. Systems can be powered by diesel, propane, LP gas, electricity, or a combination, giving RVers flexibility no matter where the road takes them.

Aqua-Hot systems are available for virtually every RV platform: Class A and Class C motorhomes, high-end Class B campervans, fifth wheels, and travel trailers. Aqua-Hot heating systems are typically installed at the factory by leading coach builders, and the brand's advanced, low-emission burner technology means neighbors at the campground won't be bothered by fuel odors either.

System Components & Electronic Controls

Modern Aqua-Hot systems rely on sophisticated electronic control boards and system-specific engine and system control components to precisely regulate burner ignition, temperature thresholds, and zone management. These purpose-built control modules are the brains behind the comfort — monitoring sensors, managing fuel delivery, and ensuring each heat zone responds accurately to demand. Replacement control boards and electrical components are essential for owners performing service or troubleshooting an aging system.

Service, Maintenance & Filtration

Keeping an Aqua-Hot system running at peak performance requires regular annual maintenance, including inspection and replacement of key filtration components. Aqua-Hot diesel-powered systems depend on reliable fuel and system filters to deliver clean fuel to the burner and protect internal components from contamination. Annual service kits, nozzles, fuel filters, and antifreeze are all part of responsible Aqua-Hot ownership, and the brand supports a network of over 300 factory-authorized service centers across North America to make that maintenance accessible.

Why Aqua-Hot Stands Apart

• Pioneer of hydronic heating technology purpose-built for RVs since 1984
• Up to five independently controlled heat zones for whole-coach comfort
• Continuous on-demand hot water — no storage tank required
• Compatible with diesel, propane, LP, electric, and engine-heat power sources
• Low-emission burner design minimizes fuel odor
• Supported by 300+ factory-authorized service centers across North America
• Adds significant resale value to motorhomes and luxury coaches