Residential ERV Installation
Your house is sealed tight to save energy. That is good for the power bill and bad for the air you sleep in. HOLISTIQ installs Zehnder energy recovery ventilation systems that feed every bedroom filtered outdoor air around the clock while recovering up to 95 percent of your heating and cooling energy. Designed, installed, and commissioned by Josh Smith, one of the few Zehnder-certified installers working in Virginia.
Why Tight Homes Need a Dedicated Fresh Air System
Building codes keep pushing houses tighter. Better sealing, better windows, thicker insulation. The energy savings are real, and so is the side effect nobody mentions at closing: a modern home holds its air the way a thermos holds coffee. Cooking fumes, shower moisture, CO2 from sleeping people, and the off-gassing from new carpet and cabinets all stay inside with you. Crack a window and you throw away the efficiency you paid for.
An energy recovery ventilator solves the problem the right way. It runs two air streams through a counterflow core: stale air heading out, fresh air coming in. The streams never mix, but the outgoing air hands off its heat and its moisture balance to the incoming air. In January, outdoor air arrives pre-warmed. In a muggy Virginia August, incoming air gets pre-cooled and partially dried before your air conditioner ever sees it. The whole system draws about as much power as a single light bulb and turns over the full volume of your house every two to three hours.
Josh installs Zehnder systems because they are the equipment he would put in his own house. He is listed with Zehnder America as a certified installer, which means factory training on design, duct layout, and commissioning. Plenty of HVAC outfits will sell you a box that ventilates. Very few will engineer a balanced system, measure the airflow at every register, and hand you a commissioning report proving it performs to spec. That report is standard on every HOLISTIQ install. See finished systems in the project gallery.
New Construction and Retrofit, Handled Differently
A residential ERV is not one product dropped into every house the same way. The right approach depends on whether your walls are open.
Building New
The best time to install an ERV is before drywall. Josh works from your architectural plans, designs the duct layout alongside the framing schedule, and coordinates directly with your builder so the rough-in lands in the right week. Because he is also a licensed electrician, the dedicated circuit and controls wiring happen in the same visit, one fewer trade on your schedule.
- Duct design from plans, before framing inspection
- Rough-in during the electrical phase
- Unit set, trim, and commissioning after finishes
- Pairs cleanly with new construction electrical and solar scopes
Retrofitting an Existing Home
Finished houses are where Zehnder equipment earns its price. The distribution tubing is semi-rigid, about the diameter of a downspout, and routes through joist bays, closets, and chases that rectangular ductwork could never use. Most retrofits finish in two to three days with patching limited to register openings.
- Walkthrough to map routing before you commit
- Unit placement in basement, utility room, or attic
- Minimal drywall disturbance, documented in the quote
- Full airflow balancing before we leave
What Changes Room by Room
The pitch for ventilation is usually numbers. The reason homeowners keep these systems is how the house feels a month later.
- Bedrooms
- CO2 builds up fastest where people sleep behind closed doors. Supply registers feed each bedroom continuous filtered air, which is the difference between waking up foggy and waking up clear. Allergy sufferers notice it first, since every cubic foot entering the house has passed through filtration that catches pollen and dust.
- Kitchen and bathrooms
- These are exhaust points. Moisture and odors get pulled out at the source instead of drifting through the house. Mirrors clear faster, and the musty smell that creeps into tight houses never gets a foothold.
- Basement and crawl spaces
- Virginia humidity is hard on the bottom of a house. Continuous exchange keeps moisture from sitting still, which is what mold needs to start. Pulling exhaust from the basement level turns the dampest air in the house into the first air to leave.
- The whole envelope
- Balanced ventilation means the house is never pressurized or depressurized, so you are not sucking unconditioned air through every gap in the framing. Your insulation does its job, your HVAC works less, and the structure stays dry.
Where We Install
Home base is Goode, Virginia, with most residential ERV work landing in Lynchburg · Bedford · Forest · Roanoke · Charlottesville and the surrounding counties. Because Zehnder-certified installers are thin on the ground, we also take projects well beyond the 60-mile core, including Maryland and North Carolina. If you are building a high-performance home anywhere in the region and cannot find a certified installer nearby, call us before you settle.
Residential ERV Questions, Answered Straight
Does my house actually need an ERV?
If your home was built or renovated in the last fifteen years, probably yes. Modern air sealing and insulation trap moisture, cooking byproducts, and CO2 inside. The old answer was leaky walls doing the ventilating for you, along with your heating bill. A residential ERV gives the house a dedicated set of lungs: stale air out, filtered fresh air in, with up to 95 percent of the conditioning energy recovered in the exchange. Older, leakier houses can still benefit, especially where allergies or humidity are a problem, but tight construction is where an ERV goes from nice to necessary.
What does a residential ERV installation cost?
It depends on the size of the home, the number of supply and exhaust points, and whether we are installing during construction or retrofitting a finished house. New construction runs less because the ductwork goes in while the walls are open. Every job gets a written quote with exact system specifications before any work starts. Call (603) 777-2596 and Josh will walk your plans or your house and price it properly.
How long does installation take in an occupied home?
Most retrofit installations run two to three days. Zehnder’s semi-rigid tubing is designed to snake through existing joist bays and wall cavities, so drywall cutting is limited to registers and a few access points. You can live in the house the whole time. New construction installs happen during rough-in and add no time to the build schedule when coordinated early.
Will I hear the system running at night?
No. Zehnder units use EC motors and smooth-wall distribution tubing that keeps air velocity low at every register. Bedrooms get supply air at a whisper. Most homeowners tell us the only way they know the system is on is that the bedroom air stops feeling stuffy in the morning. Commissioning includes balancing every register, which is also where noise problems get engineered out.
Who services the system after installation?
You handle the easy part: swapping intake filters every six to twelve months, which takes about five minutes and no tools. The heat exchange core gets rinsed annually. HOLISTIQ commissions every system we install and remains your service contact afterward. Because Josh installed it, the person answering your service call already knows your exact duct layout.
Do you install residential ERVs outside Central Virginia?
Yes. Certified Zehnder installers are rare, so we regularly take residential ERV projects beyond our home service area, including North Carolina and Maryland. Travel projects work best when scheduled ahead: send us your plans or photos, we design the system remotely, then block the installation days on site. Start with the contact page or a phone call.
Talk to the Installer, Not a Salesman
The dude that sits across the table from you is the one doing the work. Send your plans or book a walkthrough, and you will get a straight answer on whether an ERV makes sense for your house.