Lifebreath RNC5 HEX TPF User Manual

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Pre-Installation Notes

Note

•

Due to ongoing research and product development, specifications, ratings, and dimensions are

subject to change without notice. Refer to www.LIFEBREATH.com for the latest product

information.

Attention

•

Do not apply electrical power to the unit until after the completion of the installation (including

installation of low voltage control wiring).

• Ensure the installation and wiring is in accordance with CEC, NEC, and local electrical codes.

• Plug the unit into a standard designated (120 VAC) electrical outlet with ground.

• The use of an extension cord with this unit is not recommended. If the installation requires

further wiring, have a licensed electrician make all of the electrical connections. The

recommended circuit is a separate 15 A/120 V circuit.

Caution

•

Before installation, careful consideration must be given to how this system will operate if

connected to any other piece of mechanical equipment, i.e. a forced air furnace or air handler,

operating at a higher static. After installation, the compatibility of the two pieces of equipment

must be confirmed, by measuring the airflows of the HRV, by using the balancing procedure

found in this manual. Never install a ventilator in a situation where its normal operation, lack of

operation or partial failure may result in the back drafting or improper functioning of vented

combustion equipment

• Unit must be installed level to ensure proper condensate drainage. Due to the broad range of

installation and operational conditions, consider the possibility of condensation forming on

either the unit or connecting ducting. Objects below the installation may be exposed to

condensate.

• Do not install control wiring alongside electrical wire.

Warning

Table of Contents

Questions and Answers:

J
Joseph ThorntonAug 12, 2025
How to improve poor airflow in my Lifebreath RNC5 HEX TPF?
- B
  Brian WilliamsAug 12, 2025
  Poor airflow in your Lifebreath Fan can stem from several issues. Start by cleaning any plugged exterior hoods or vents. Next, remove and clean the filter. Also, ensure that the core is free from obstructions by removing and cleaning it. Check that all house grilles are open and unobstructed. If dampers are installed, make sure they are open and properly adjusted. It's also important to have an electrician verify the power supply voltage. Confirm the ductwork isn't restricting the HRV, and increase the HRV speed if the speed control setting is too low. If issues persist, have a contractor balance the HRV airflow.
L
Lisa LeeAug 16, 2025
What to do if humidity levels are too high with Lifebreath Fan?
- D
  David LeeAug 16, 2025
  High humidity levels and condensation on windows when using a Lifebreath Fan can be addressed by several adjustments. First, lower the dehumidistat setting. If you have a hot tub or indoor pool, cover them when not in use. Try to avoid hanging clothes to dry indoors, storing wood inside, or venting the clothes dryer inside. Ensure the crawl space is vented and has a vapor barrier. Increase the speed of the HRV unit. Also, ensure ducts from the washroom are adequately sized to remove moist air effectively; using a bathroom fan can help remove additional moisture.
R
Richard FuentesAug 19, 2025
What to do if the dehumidistat is not operating on my Lifebreath RNC5 HEX TPF Fan?
- S
  Steven NguyenAug 20, 2025
  If the dehumidistat on your Lifebreath Fan isn't working, consider these potential causes. First, if the outdoor temperature is above 15°C (59°F), the dehumidistat is likely functioning normally. Otherwise, check that the correct terminals have been used for the low voltage connection, and inspect the external wiring for any shorts caused by staples or nails. Also, ensure the dehumidistat is not set to the OFF position; adjust it to the desired setting.
D
David HintonAug 23, 2025
Why does the supply air from my Lifebreath RNC5 HEX TPF feel cold?
- L
  Laura CookAug 23, 2025
  If the supply air from your Lifebreath Fan feels cold, consider these points: * Relocate supply grilles to high on the walls or under the baseboards, or install ceiling-mounted diffusers to avoid direct airflow on occupants. * If the outdoor temperature is extremely cold, reduce the HRV supply speed; a small duct heater (1 kW) can also temper the supply air. * Ensure furniture placement or closed doors aren't restricting air movement; if the supply air is ducted into the furnace return, the furnace fan may need to run continuously.
M
Melissa LeAug 27, 2025
How to improve poor airflows in Lifebreath Heating System?
- F
  fleeAug 27, 2025
  Poor airflow in your Lifebreath Heating System can stem from several causes. Start by cleaning any plugged exterior hoods or vents. Check and clean the filters and the core. Ensure that house grilles and dampers, if installed, are open and properly adjusted. Have an electrician inspect the power supply voltage. Review duct installation to ensure it's not restricting the HRV. Increase the HRV speed if the speed control setting is too low. If issues persist, have a contractor balance the HRV.
A
amanda61Aug 30, 2025
Why are humidity levels too high with Lifebreath Heating System?
- P
  Paul DaltonAug 30, 2025
  High humidity levels and condensation in your home when using a Lifebreath Heating System can be addressed by several adjustments. Begin by setting the dehumidistat to a lower level. If you have a hot tub or indoor pool, ensure they are covered when not in use. Avoid drying clothes indoors, storing wood inside, and ensure your clothes dryer is properly vented. Ensure that washroom ducts are adequately sized to remove moist air, and consider using a bathroom fan. Increase the speed of the HRV. Note that condensation may appear during seasonal changes on humid days.
T
Taylor BarreraSep 4, 2025
Why does supply air feel cold from Lifebreath Heating System?
- C
  Christian RichmondSep 4, 2025
  If the supply air from your Lifebreath Heating System feels cold, consider these factors: The location of supply grilles might be causing discomfort; relocate them higher on the walls or under baseboards, or install ceiling-mounted diffusers. If the outdoor temperature is extremely cold, reduce the HRV supply speed or consider using a small duct heater. Ensure furniture or closed doors aren't restricting air movement. If supply air is ducted into the furnace return, the furnace fan may need to run continuously.
S
Sharon HernandezSep 7, 2025
What to do if dehumidistat is not operating on Lifebreath Heating System?
- H
  hoffmanrobertSep 7, 2025
  If the dehumidistat on your Lifebreath Heating System isn't working, first, check if the outdoor temperature is above 15°C (59°F), as the dehumidistat may be functioning normally (see Auto Dehumidistat Disable in this manual). Verify the low voltage connections and check for shorts in the external wiring caused by staples or nails. Also, ensure the dehumidistat is not set to the OFF position and adjust it to the desired setting.

Lifebreath RNC5 HEX TPF Specifications

General

Brand	Lifebreath
Model	RNC5 HEX TPF
Category	Fan
Language	English

Summary

Simplified Installation (Return/Return Method)

Partially Dedicated System Installation

Fully Dedicated System Installation

Mounting (RNC4-TPD, RNC4-TPF, & RNC 88)

Mounting the RNC4-TPD & RNC4-TPF

Steps for mounting RNC4-TPD and RNC4-TPF models.

Mounting the RNC 88

Instructions for mounting the RNC88 model.

Drain Connection

Installation Steps

Procedure for connecting the HRV's drain system.

Main Control Installation (99-DXPL03)

Main Control Installation (99-BC02/3/4)

Installation

Step-by-step instructions for installing the 99-BC02/3/4 main controls.

Interlocking the HRV

Interlocking the HRV to a Furnace/Air Handler

Explains how to interlock the HRV with furnace/air handler systems.

Installer Selectable High Speed Settings

DIP Switch settings

Table for configuring DIP switches for fan speed selection.

Functionality of DIP Switches

Explains DIP switch functions for recirculation mode.

Balancing the Airflows

Airflow Measuring Gauge

Use of a digital manometer for airflow measurement.

Determining the CFM

How to calculate CFM flow rate using example data.

Airflow Balancing Kit

Units with Balancing Collars

Gauge Attachments

Hard/Rigid Ducting

Balancing Preparation

Essential preparation steps before air balancing.

Insulated flexible ducting

Balancing the Airflows – Pitot Tube

Balancing the Airflows – Door Ports

Steps

Procedure for measuring and balancing airflow using door ports.

Troubleshooting

Poor airflows

Causes and solutions for poor airflow issues in the HRV.

Supply air feels cold

Dehumidistat is not operating

Troubleshooting steps for a non-functioning dehumidistat.

Humidity levels are too high condensation is appearing on the windows

Solutions for high humidity and window condensation issues.

Humidity levels are too low

HRV and/or ducts frosting up

Steps to address frost buildup on the HRV or ducts.

Condensation or ice buildup in insulated duct to the outside

Excess water in the bottom of the HRV

Addresses excess water accumulation in the HRV unit's base.

Excessive Vibration

Troubleshooting steps for excessive vibration in the HRV.

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