RV Furnace
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InstaHeat at a Glance — What Each Furnace Delivers
| Model | Heat Output | Airflow | Noise / Mode | Control | Best For |
|---|---|---|---|---|---|
| InstaHeat 20KCompact Replacement Furnace | 20,000 BTU | 245 CFM | — | Wired rotary thermostat | Suburban NT-SEQ replacements, small RVs and compact installations |
| InstaHeat 25KCompact Furnace | 25,000 BTU | 240 CFM | Quiet Operation | Wired digital thermostat | Small trailers, compact RVs, flexible replacement installs |
| InstaHeat 30KBalanced Upgrade | 30,000 BTU | 260 CFM | Quiet ducted comfort | Wired digital thermostat | Travel trailers and fifth wheels needing stronger, steadier heat |
| InstaHeat Ultra 35KSmart Winter Furnace | 17K / 25K / 30K / 35K BTU | 320 CFM | Rapid / Standard / Sleep, 40 dB sleep mode | Smart wired controller, ±1°F adjustment, diagnostic alerts | Cold-weather RVing, larger cabins, full-time comfort |
Choose Your InstaHeat
Take a closer look at each model’s features and specifications.
InstaHeat 20K Replacement
Compact RVs and direct replacement installs Designed for Suburban NT-SEQ Series replacement
- Power: 20,000 BTU heating output
- Airflow: 245 CFM circulation
- Control: Wired rotary thermostat
- Fit: Compact, space-saving furnace design
An easy-fit heating upgrade for RVers replacing a Suburban NT-SEQ Series furnace or working with limited installation space.
Best for: Suburban NT-SEQ replacements, small RVs, compact trailers, and space-limited installations.
InstaHeat 25K Compact
Small RVs and compact trailers Flexible replacement furnace
- Power: 25,000 BTU heating output
- Airflow: 260 CFM/min heating rate
- Quiet: Ultra-low noise operation ≤50 dB
- Install: Horizontal or vertical mounting
A practical furnace upgrade when space, fit, and dependable basic warmth matter most.
Best for: compact RVs, small trailers, replacement installs, budget-focused winter prep.
InstaHeat 30K Balanced
Travel trailers and fifth wheels Stronger airflow, steadier warmth
- Power: 30,000 BTU rapid heating
- Airflow: 240 CFM circulation
- Control: Wired digital thermostat
- Reliability: Electronic wind-pressure sensor
The balanced upgrade for RVers who want better startup reliability and steadier heat.
Best for: mid-size rigs, cold-weather weekends, ducted propane furnace replacements.
InstaHeat Ultra 35K Ultra
Cold-weather RVing and full-time comfort Smart four-stage power
- Power: 17K / 25K / 30K / 35K BTU selectable output
- Modes: Rapid, Standard, and Sleep
- Quiet: 40 dB sleep-mode operation
- Airflow: 320 CFM with 7 duct openings
Fast when you are cold. Quiet when you sleep. Smarter once the cabin is warm.
Best for: larger RVs, winter trips, full-timers, anyone replacing a noisy one-speed furnace.
Don't take our word for it.
See what real customers and creators have to say.
Ready for Winter Without the Guesswork?
Choose 25K for compact replacement heat, 30K for a stronger all-around upgrade, and 35K when you want the most control: fast startup, quiet sleep mode, and selectable power that helps the furnace behave more like a comfort system than a blast of hot air.
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