Solatube EPS Ultra
A ducted EC fan for homes of 2,000 to 3,200 sq ft at a low price from Solatube’s own store; the 5-year motor warranty is the trade-off.
Amazon $985 Solatube $885$885
The Solatube EPS Ultra is the better whole house fan overall, rated 3.7 to 3.2. The Solatube EPS Ultra leads on value and warranty. The AirScape Sierra 3200 wins on efficiency and damper. The Solatube EPS Ultra costs $1,034 less ($885 vs $1,919).
AirScape Sierra 3200
A premium ducted fan for a typical home in a cold or mixed climate, where the motorized R13 doors earn their cost.
HVACQuick $1,919$1,919
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Solatube EPS Ultra for value ($250.57 per 1,000 CFM ($885, 3,532 CFM) vs $580.28 per 1,000 CFM ($1,919, 3,307 CFM)) and warranty (5-year warranty on the motor vs 3-year warranty on the motor).
- Choose the AirScape Sierra 3200 for efficiency (10.6 CFM per watt vs 9.2 CFM per watt) and damper (R-13 insulated damper vs R-6 insulated damper).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 3,001 to 5,000 CFM whole house fan; a clear win is highlighted. How we rank explains each one.
| Factor weight | Solatube EPS Ultra | AirScape Sierra 3200 |
|---|---|---|
| Overall rating | 3.7/5 | 3.2/5 |
| Value 30% | 91 $250.57 per 1,000 CFM ($885, 3,532 CFM) | 31 $580.28 per 1,000 CFM ($1,919, 3,307 CFM) |
| Efficiency 20% | 70 9.2 CFM per watt | 93 10.6 CFM per watt |
| Noise 15% | 50 noise rating not published (neutral score used) | 33 60 dBA at high speed |
| Damper 10% | 40 R-6 insulated damper | 87 R-13 insulated damper |
| Warranty 25% | 44 5-year warranty on the motor | 22 3-year warranty on the motor |
Specifications
| Solatube EPS Ultra | AirScape Sierra 3200 | |
|---|---|---|
| Airflow | ||
| Airflow, high speed | 3,532 CFM | 3,307 CFM |
| Power, high speed | 383 W | 312 W |
| Efficiency | 9.2 CFM/W | 10.6 CFM/W |
| Speeds | 7 | 10 |
| Noise | - | 60 dBA |
| Install | ||
| Mount | Ducted | Ducted |
| Damper | R-6 insulated | R-13 insulated |
| Ceiling opening | - | 14.5 x 22.5 in |
| Attic vent area needed | 6 sq ft | 4.3 sq ft |
| Voltage | 120 V | 120 V |
| Remote or wall control | Yes | Yes |
| Warranty | ||
| Warranty | 5 years | 3 years |
| Released | 2023-06 | - |