Lifebreath RNC155 HRV
A cold climate HRV with good heat recovery and a lifetime core warranty. Its price per cfm is high bought online, so compare it with the Broan and Fantech first.
Amazon $1,636.66$1,636.66
The Lifebreath RNC155 HRV is the better ERV or HRV overall, rated 3.4 to 3.1. The Lifebreath RNC155 HRV leads on heat recovery. The Fantech FLEX 100H costs $505.03 less ($1,131.63 vs $1,636.66).
Fantech FLEX 100H
An HRV for a condo or apartment where space is the main constraint. Anyone with room for a full size unit gets far better recovery for the money from the Broan or HERO.
Amazon $1,131.63$1,131.63
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 Lifebreath RNC155 HRV for heat recovery (75% sensible recovery vs 61% sensible recovery).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every whole-house HRV ERV or HRV; a clear win is highlighted. How we rank explains each one.
| Factor weight | Lifebreath RNC155 HRV | Fantech FLEX 100H |
|---|---|---|
| Overall rating | 3.4/5 | 3.1/5 |
| Heat recovery 25% | 67 75% sensible recovery | 20 61% sensible recovery |
| Efficiency 15% | 50 power draw not published (neutral score used) | 50 power draw not published (neutral score used) |
| Value 25% | 38 $11.86 per cfm ($1,636.66, 138 cfm) | 45 $10.68 per cfm ($1,131.63, 106 cfm) |
| Quiet 10% | 50 noise not published (neutral score used) | 50 noise not published (neutral score used) |
| Warranty 25% | 67 5-year warranty | 67 5-year warranty |
Specifications
| Lifebreath RNC155 HRV | Fantech FLEX 100H | |
|---|---|---|
| Performance | ||
| Core | HRV (heat only) | HRV (heat only) |
| Install | Ducted, whole house | Ducted, whole house |
| Airflow | 138 cfm | 106 cfm |
| Sensible recovery | 75% | 61% |
| Build | ||
| Frost protection | Yes | Yes |
| Filter | MERV 6 | - |
| ENERGY STAR | Yes | - |
| HVI certified | Yes | Yes |
| Warranty | 5 years | 5 years |