Lifebreath 455FD - User Manual

Questions and Answers

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Mr. Kevin TaylorAug 13, 2025
Why do Lifebreath 455FD have poor airflow?
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  scott09Aug 13, 2025
  Poor airflow in Lifebreath Air Handlers can stem from several causes: * A plugged 1/4 in. (6mm) mesh on the outside hood. Solution: Clean exterior hoods or vents. * Filters being plugged. Solution: Remove and clean the filter. * An obstructed core. Solution: Remove and clean the core. * Closed or blocked house grilles. Solution: Check and open the grilles. * Closed dampers (if installed). Solution: Open and adjust the dampers. * Poor power supply at the site. Solution: Have an electrician check the supply voltage. * Ductwork restricting the HRV. Solution: Check the duct installation. * Improper speed control setting. Solution: Increase the speed of the HRV. * Improperly balanced HRV airflow. Solution: Have a contractor balance the HRV.
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Ruben HendersonAug 20, 2025
Why is supply air cold from my Lifebreath Air Handler?
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  Rose DelacruzAug 20, 2025
  Cold supply air from Lifebreath Air Handlers can be due to: * Poor location of supply grilles, causing airflow to irritate occupants. Solution: Locate grilles high on walls or under baseboards; install ceiling-mounted diffusers or grilles to avoid direct airflow on occupants. * Extremely cold outdoor temperature. Solution: Turn down the HRV supply speed. A small duct heater (1 kW) could be used to temper the supply air. * Placement of furniture or closed doors restricting air movement. Solution: If supply air is ducted into the furnace return, the furnace fan may need to run continuously to distribute ventilation air comfortably.
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Raymond BurkeAug 25, 2025
What to do if my Lifebreath Air Handler HRV and/or ducts are frosting up?
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  Cindy JordanAug 26, 2025
  If your Lifebreath Air Handler HRV and/or ducts are frosting up: * HRV airflows may be improperly balanced. Note: minimal frost build-up is expected on cores before unit initiates defrost cycle functions. * There may be a malfunction of the HRV defrost system. Have an HVAC contractor balance the HRV.
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Troy ColemanAug 28, 2025
What to do if my Lifebreath 455FD dehumidistat is not operating?
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  zamorajenniferAug 28, 2025
  If the dehumidistat on your Lifebreath Air Handlers isn't working, check these potential issues: * Outdoor temperature is above 15°C (59°F): The dehumidistat is functioning normally (see Auto Dehumidistat Disable in this manual). * Improper low voltage connection: Verify the correct terminals are used. * External low voltage is shorted out by a staple or nail: Check external wiring for shorts. * Dehumidistat is set to OFF: Set the dehumidistat to the desired setting.
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Kyle RamirezAug 31, 2025
What causes condensation or ice buildup in the insulated duct of my Lifebreath Air Handler?
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  Ashley StrongAug 31, 2025
  Condensation or ice buildup in the insulated duct of your Lifebreath Air Handler could be due to: * An incomplete vapor barrier around the insulated duct. Solution: Tape and seal all joints. * A hole or tear in the outer duct covering. Solution: Tape any holes or tears in the outer duct covering, ensuring the vapor barrier is completely sealed.
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Robert RiveraSep 4, 2025
What to do if my Lifebreath Air Handler has excess water in the bottom?
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  Mrs. Charlotte MurphySep 4, 2025
  If there's excessive water at the bottom of your Lifebreath Air Handler, check: * Drain pans for obstructions in the drain line. * For kinks in the drain line, indicating improper connection of the HRV’s drain lines.
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jamesramseySep 8, 2025
Why are humidity levels too low with Lifebreath Air Handlers?
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  Jeremy RojasSep 8, 2025
  Low humidity levels with Lifebreath Air Handlers can result from: * The blower speed of the HRV being too high. Suggested solution: Decrease HRV blower speed. * Lifestyle of occupants. Suggested solution: Humidity may have to be added using humidifiers. * HRV airflows may be improperly balanced. Suggested solution: Have contractor balance HRV airflows.
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Matthew OlsonNov 16, 2025
What to do if humidity levels are too high with Lifebreath Air Handlers?
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  Philip LyonsNov 16, 2025
  If you're experiencing high humidity levels and condensation with your Lifebreath Air Handlers, consider these factors: * Dehumidistat is set too high: Lower the dehumidistat. * HRV is not sized to handle a hot tub, indoor pool etc: Cover pools and hot tubs when not in use. * Lifestyle of the occupants: Avoid drying clothes indoors, storing wood inside, and venting the clothes dryer inside. Move firewood outside. * Moisture coming into the home from an unvented or unheated crawl space: Vent the crawl space and place a vapor barrier on the floor. * Moisture remaining in washroom and kitchen areas: Ensure ducts from the washroom are sized to effectively remove moist air; use a bathroom fan for short periods to remove additional moisture. * Condensation forming in spring and fall...

Lifebreath 455FD Specifications

General

Model	455FD
Type	Heat Recovery Ventilator
Heat Recovery Efficiency	Up to 80%
Voltage	120V
Motor Type	PSC
Filter Size	16" x 20" x 1"
Max External Static Pressure	0.5 in. w.g.

Lifebreath 455FD - User Manual

Table of Contents

Questions and Answers

Lifebreath 455FD Specifications