Question? Just ask us!
Free Encyclopedia of Building & Environmental Inspection, Testing, Diagnosis, Repair
InspectAPedia ® Home
VENTILATION in BUILDINGS
AIR BYPASS LEAKS
AIR LEAK DETECTION TOOLS
AIR LEAK SEALING PROCEDURE
AIR POLLUTANTS, COMMON INDOOR
AIR SEALING STRATEGIES
ROOF ICE DAM LEAKS
BASEMENT CEILING VAPOR BARRIER
BASEMENT HEAT LOSS
BASEMENT LEAKS, INSPECT FOR
BLOWER DOORS & AIR INFILTRATION
BRICK WALL DRAINAGE WEEP HOLES
CATHEDRAL CEILING VENTILATION
CEILINGS, DROP or SUSPENDED PANEL
COMBUSTION AIR for TIGHT buildings
COOLING LOAD REDUCTION by ROOF VENTS
CONDENSATION on WINDOWS & SKYLIGHTS
DEW POINT CALCULATION for WALLS
FIREPLACES & HEARTHS
FLAT ROOF MOISTURE & CONDENSATION
GREEN BUILDING CONSTRUCTION
HEAT LOSS in BUILDINGS
HEAT LOSS DETECTION TOOLS
HEAT RECOVERY VENTILATORS
HOT ROOF DESIGNS: Un-Vented Roof Solutions
HOUSEWRAP AIR & VAPOR BARRIERS
HOUSE DOCTOR, how-to be
HUMIDITY LEVEL TARGET
ROOF ICE DAM LEAKS
INDOOR AIR HAZARDS TABLE
INDOOR AIR QUALITY & HOUSE TIGHTNESS
INDOOR AIR QUALITY IMPROVEMENT GUIDE
INSULATION AIR & HEAT LEAKS
INSULATION INSPECTION & IMPROVEMENT
INSULATION R-Values & Properties
LOG HOME GUIDE
MOISTURE CONTROL in BUILDINGS
MICROWAVE OVEN VENT INSTALL
ODORS GASES SMELLS, DIAGNOSIS & CURE
ROOF VENTILATION SPECIFICATIONS
ROOF ICE DAM LEAKS
SHEATHING, FOIL FACED - VENTS
STAIN DIAGNOSIS on BUILDING INTERIORS
STUCCO WALL METHODS & INSTALLATION
SWEATING (CONDENSATION) on PIPES, TANKS
THERMAL MASS in buildings
THERMAL TRACKING Indicates Heat Loss
VAPOR BARRIERS & AIR SEALING at BAND JOISTS
VAPOR BARRIERS & HOUSEWRAP
VAPOR CONDENSATION & BUILDING SHEATHING
VENTILATION in BUILDINGS
WIND WASHING INSULATION At EAVES
WINDOWS & DOORS
Heat recovery ventilator installation in a bathroom: This article describes the installation of an HRV over a bath shower. A reader questions handling the high moisture level created by the shower and whether or not this will be a problem for a conventional heat recovery ventilation system.
This article series explains how to install bathroom exhaust fans or vents, the vent ducting, the vent termination at the wall, soffit or roof, vent fan wiring, bath vent duct insulation, bath vent lengths, clearances, routing, and we answer just about any other bathroom ventilation design or installation question you may have.
Green links show where you are. © Copyright 2014 InspectApedia.com, All Rights Reserved.
Question: installing a heat recovery ventilator over a bathroom shower: Brink Climate Systems Renovent HR installation specifications
[Click to enlarge any image]
Eugene, I think we're discussing ceiling exhaust vents; placing one directly over the shower is fine and probably increases the ease with which it picks up moisture. Naturally one would presume that the installation is electrically safe from touch etc. (e.g. no switch is located where it can be touched from within the shower) and that water is never going to be sprayed onto the device.
An exhaust fan system that could not tolerate moisture would be one I would toss in the trash.
As an example we looked at Panasonic's installation manual for their ceiling mounted ventilating fan models FV05Q3 - FV15Q4. These models are UL listed for tub and shower enclosures.
That fan should not be installed where temperatures exceed 104 degF. and its duct runs should not be constricted (the instructions show examples of that snafu).
But there is no mention of NOT locating the fan where it is in fact most needed and most effective - over the moisture source.
You are discussing a different piece of equipment, not a bath vent fan but a heat recovery ventilating fan. That type of product is discussed at BALANCED VENTILATION found at inspectapedia.com/BestPractices/Ventilation_Balanced.htm
If you want to give us the brand and model we (or you) ought to be able to find the manufacturer's installation instructions to see what constraints apply. Certainly I could *imagine* that a HRV fan that has to handle high levels of moisture might not be designed for that application.
Thanks for your thoughts on this. I have read as much as I could about ventilation before doing this install at home and no other source has made an issue about putting an exhaust valve over the shower area but I just wanted to get another opinion just in case I missed something
I intend doing this tomorrow and I would not like to have to redo it later! The unit is a Renovent made by Brink Climate Systems with a heat recovery efficiency of about 90%. Their installation manual has nothing in it specific to bathrooms. There are no electrical connections at all associated with the valves as the air handling unit does all the work.
Looking at the Medium/Large installation instructions for the Brink Climate Systems Renovent HR, you will see that the unit has built-in frost protection that should mean it can handle moisture in the vented air.
• The appliance must be placed level.
But this feature may be important for your installation:
Input 0-10 V for a moisture sensor: When the moisture content in the dwelling increases, for in-
Now I read that as rather clear that the manufacturer anticipates handling moisture generated by a shower.
Some common sense about unit location to protect it from water, say from shower splashing, would of course be pertinent.
If you are considering the smaller Renovent you might want to review the features I've described with the manufacturer directly to see if they are needed for your installation.
You didn't indicate where you are located, but this may help:
For Ireland and Great Britain
(Apr 8, 2014) Eugene said:
I have still a long way to go but at least I can take one more thing off the list.
Continue reading at BATHROOM FAN ENERGY COST
Suggested citation for this web page
Green link shows where you are in this article series.
Frequently Asked Questions (FAQs)
No FAQs have been posted for this page. Try the search box below or CONTACT US by email if you cannot find the answer you need at InspectApedia.
Use the "Click to Show or Hide FAQs" link just above to see recently-posted questions, comments, replies, try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly.
Search the InspectApedia website
HTML Comment Box is loading comments...
Technical Reviewers & References
References for Bathroom Vent Fan Installation