ERV/HRV System Installation and Service in San Diego, CA
An ERV (Energy Recovery Ventilator) or HRV (Heat Recovery Ventilator) is a mechanical ventilation system that continuously exchanges stale indoor air for fresh outdoor air while recovering most of the energy from the air being exhausted – so your HVAC system doesn’t have to work overtime to condition air you just paid to heat or cool. In San Diego, where homes are built tight for energy efficiency and residents keep windows closed during wildfire smoke season, these systems are one of the most practical Air Quality & Ventilation upgrades a homeowner can make. If your home feels stuffy, smells off, or shows elevated humidity despite running air conditioning, an ERV or HRV installation from Redwood Heating & Air is very likely the right answer.
Gregory Hahn founded Redwood Heating & Air 13 years ago and still leads every technical decision – including how we size, select, and install ventilation equipment. We’re not sending a crew that only knows one brand. We’re sending technicians who understand the full picture of how your home breathes, what San Diego’s coastal marine layer does to indoor humidity in neighborhoods like Pacific Beach and Mission Hills, and which equipment actually performs in this climate. With 428 verified reviews averaging 4.6 stars, our track record on jobs like this is easy to verify before you ever pick up the phone.
This page is part of our broader Air Quality & Ventilation in San Diego service. If you’re ready to talk through whether an ERV or HRV is right for your home or commercial space, call us at (844) 875-9451. Estimates are free.
What’s the Difference Between an ERV and an HRV?
Both systems do the same core job: they exchange stale inside air with fresh outside air using a heat exchanger core that recovers most of the energy from the exhaust stream, so you’re not conditioning raw outdoor air from scratch. The difference is what happens to moisture.
An HRV (Heat Recovery Ventilator) transfers heat but sends moisture outside with the exhaust air. That makes HRVs the right choice in climates where indoor humidity is consistently high and you want to actively drive it down.
An ERV (Energy Recovery Ventilator) transfers both heat and a portion of moisture between the two airstreams. In San Diego’s climate – where marine layer humidity swings between coastal neighborhoods and drier inland communities like El Cajon or Santee – an ERV is usually the better fit. It keeps indoor relative humidity from dropping too low (a humidifier install can help in extreme cases) in dry Santa Ana wind conditions while still providing fresh air exchange. It also recovers more total energy in mild-temperature climates, which describes San Diego for most of the year.
Gregory Hahn will diagnose your specific situation before recommending one over the other. The wrong choice for your climate and building envelope can actually make air quality problems worse, not better.
When You Need an ERV or HRV System
These are the situations where we consistently find that a ventilation system is the real fix, not another filter or air purifier:
- Persistent stuffiness despite running the AC: San Diego homes built after 2000 are often sealed tight enough that natural air infiltration isn’t enough to dilute indoor pollutants. If your home feels thick or stale within hours of closing it up, you have a ventilation deficit, not a filtration problem.
- Elevated indoor CO2 and VOC readings: If you’ve tested your indoor air and CO2 is consistently above 1,000 ppm or you’re seeing VOC spikes from furniture, flooring, or cleaning products, fresh air dilution is the only real solution. We see this regularly in newer construction in neighborhoods like Scripps Ranch and Otay Ranch where build quality is high but ventilation design was an afterthought.
- Condensation or mold appearing on windows and walls: Coastal San Diego homes in La Jolla, Ocean Beach, and Point Loma often sit in persistent marine layer humidity. Without active ventilation to manage moisture exchange, that humidity works its way into wall cavities and window frames. An ERV controlled properly can reduce the pressure imbalances that pull moist air into the building envelope.
- Wildfire smoke infiltration: During Santa Ana wind events and fire seasons, San Diego air quality frequently drops into unhealthy ranges. An ERV or HRV paired with a good filtration module keeps fresh air coming in while your HVAC system is managing filtration – rather than sealing the house completely and letting CO2 and humidity build up inside.
- New construction or recent weatherization: If you’ve recently had your home resealed, windows replaced, or insulation upgraded, you may have inadvertently reduced natural ventilation below the minimum exchange rates recommended by ASHRAE 62.2. This is one of the most common reasons we get called out to homes in newer developments in Chula Vista and National City.
- Occupant health concerns tied to indoor air: If someone in the home deals with asthma, allergies, or chemical sensitivities and symptoms worsen indoors, controlled fresh air exchange is often part of the clinical recommendation. We work alongside these concerns and size systems accordingly.
Our ERV/HRV System Process
We don’t install equipment and hand you a receipt. Here’s exactly how we work through an ERV or HRV project:
- Whole-home ventilation assessment: Before any equipment discussion, Gregory Hahn or a senior technician evaluates your current HVAC layout, duct configuration, building tightness, and air quality baseline. We measure square footage and occupancy, check existing exhaust fans, and review any test data you have. This is what prevents over- or under-sizing – one of the most common installation errors we correct on second-opinion calls.
- Equipment selection and sizing: We calculate the required ventilation rate using ASHRAE 62.2 or 62.1 (residential vs. commercial) and match that to appropriate equipment. For residential work, we’ve installed units from brands including Lennox and Trane that integrate cleanly with existing forced-air systems. We recommend based on what works for your system, not on which brand pays the best margin.
- Duct and integration planning: An ERV or HRV needs dedicated supply and exhaust duct runs to the outside, plus integration with your existing HVAC ductwork. We plan the routing to minimize duct length, maintain proper airflow balance, and avoid pressure conflicts with your existing system. In older San Diego homes with attic-based duct systems – common in Kensington, North Park, and Normal Heights – this step can be the most technically demanding part of the project.
- Installation: We mount the unit, run duct penetrations through the building envelope with proper sealing and weatherproofing, connect to the existing system, and wire controls. All exterior penetrations are sealed to California Title 24 standards. We don’t leave gaps that invite pests or moisture intrusion.
- Commissioning and airflow balancing: After installation, we measure actual airflow at each port using a balometer and adjust dampers until supply and exhaust are within spec. An unbalanced ERV or HRV can depressurize your home and actually pull combustion gases from water heaters or furnaces back inside – a safety issue we take seriously and test for explicitly.
- Owner walkthrough and controls orientation: We walk you through the control settings, seasonal adjustment recommendations for San Diego’s climate swings between June Gloom and Santa Ana conditions, and filter maintenance schedule. You’ll know exactly what the system is doing and how to get the most out of it.
ERV/HRV System Pricing in San Diego
ERV and HRV installation in San Diego typically runs between $1,800 and $4,500 for a residential project, depending on equipment, duct complexity, and integration requirements. Commercial projects scale based on building size and ASHRAE requirements and are quoted individually. Here’s a breakdown of what moves the number:
| Cost Factor | Typical Range |
|---|---|
| ERV/HRV unit (residential, supply-only or integrated) | $600 – $1,800 |
| Duct fabrication and exterior penetrations | $400 – $900 |
| Integration with existing HVAC system | $200 – $500 |
| Commissioning, balancing, and controls | $150 – $350 |
| Full residential project (all-in estimate) | $1,800 – $4,500 |
What tends to push the price up in San Diego specifically: older homes in neighborhoods like South Park, Golden Hill, or City Heights often have non-standard attic or crawl space configurations that require custom duct routing. Homes near the coast in Del Mar or La Jolla sometimes have stricter HOA or permit requirements that add time. And homes without existing dedicated exhaust infrastructure need more ductwork than a newer build with bath fans already roughed in.
What keeps costs down: homes with accessible attics and a central air handler in a standard utility closet are much more straightforward to work in. If your HVAC system is already from a brand like Goodman or Rheem with a compatible air handler, integration is cleaner and faster.
We don’t quote jobs over the phone without seeing the home. Call (844) 875-9451 to schedule a free on-site estimate.
Why San Diego Homes Need Controlled Ventilation
San Diego’s mild climate creates a specific paradox. Because temperatures rarely get extreme enough to force you to run the HVAC system continuously, homes often go through long stretches with all windows closed and no mechanical indoor air quality exchange happening at all. That’s the period when indoor pollutants – CO2 from occupants, VOCs from materials, moisture from cooking and bathing – concentrate to levels that measurably affect how people feel and how well they sleep.
Add the seasonal wildfire smoke risk. San Diego County has seen multiple years in a row where AQI in affected areas spiked above 150 during Santa Ana events. The instinct is to seal the house – but without a controlled ventilation system with filtration, you’re also sealing in whatever is already in the air inside. An ERV with a MERV-13 filter module gives you fresh air exchange with filtration control, rather than choosing between stale indoor air and smoky outdoor air.
The California Building Code now references ASHRAE 62.2 for residential ventilation minimums. Many existing San Diego homes, particularly those built in the 1980s and 1990s in suburbs like Mira Mesa, Rancho Penasquitos, and Clairemont, were built before those ventilation standards were codified and rely entirely on incidental infiltration. That works fine in a leaky house. Modern weatherization and energy efficiency upgrades have made those same houses tight enough that infiltration alone no longer provides adequate exchange rates.
We’ve been working on San Diego homes for 13 years and have seen this pattern play out consistently. The solution isn’t to abandon energy efficiency. It’s to ventilate intentionally and recover the energy you’d otherwise waste.
The Redwood Heating & Air Difference on Ventilation Work
Most HVAC companies in San Diego treat ventilation as an add-on. We treat it as a system-level problem that requires the same diagnostic rigor as any HVAC diagnosis. Gregory Hahn built this company around that principle, and it’s why we attract customers who’ve already tried the quick fix and found it didn’t hold.
Being multi-brand certified across nine major manufacturers – including Lennox, Trane, Goodman, and Rheem – means we can assess what you already have and integrate new ventilation equipment around it rather than pushing a specific brand because that’s all we know. Thirteen years in business and 428 verified customer reviews averaging 4.6 stars reflect a track record that’s easy to check.
We also do this work for commercial clients – small office buildings, retail spaces, and multi-unit residential – where ASHRAE 62.1 compliance and occupant density calculations are part of the job. If you manage a commercial property in the San Diego area and are dealing with tenant air quality complaints, we’re equipped to diagnose and design a ventilation solution at that scale too.
For context on how ERV and HRV systems fit into the full picture of indoor air management, the Redwood Heating & Air home page outlines our complete range of residential and commercial HVAC services.
FAQs – ERV/HRV System in San Diego
How much does ERV or HRV installation cost in San Diego?
Residential ERV and HRV installation in San Diego typically costs between $1,800 and $4,500, all-in, depending on the unit selected, duct complexity, and how your existing HVAC system is configured. Simpler installs in newer homes with accessible attics and standard air handler setups land toward the lower end. Older homes with non-standard layouts or limited attic access – common in neighborhoods like North Park, University Heights, and Kensington – tend to run higher due to custom duct routing. Call (844) 875-9451 for a free on-site estimate specific to your home.
What’s the difference between an ERV and HRV, and which is better for San Diego?
An ERV transfers both heat and moisture between incoming and outgoing airstreams; an HRV transfers heat but exhausts moisture to the outside. For most San Diego homes – where humidity swings between coastal marine layer conditions and dry Santa Ana winds – an ERV is usually the better fit because it prevents the indoor air from becoming too dry during low-humidity periods while still providing fresh air exchange. Homes with chronic high indoor humidity near the coast may benefit from an HRV. Gregory Hahn will assess your specific conditions and make a clear recommendation before any equipment is selected.
Can an ERV or HRV help with wildfire smoke in San Diego?
Yes, with the right filtration configuration. An ERV or HRV equipped with a MERV-13 or better filtration module can bring in fresh air while filtering out a significant portion of fine particulates from smoke. During active smoke events, the system can also be configured to reduce or pause outdoor air intake while maintaining recirculation filtration through your HVAC system. This is a meaningful upgrade over simply sealing the house, which causes CO2 and indoor pollutants to accumulate. We configure systems with San Diego’s fire season in mind.
How often does an ERV or HRV need maintenance in San Diego?
Most residential ERV and HRV systems need filter replacement every three to six months and a core inspection once a year. In San Diego, coastal homes near the ocean pick up salt particulate that can clog filters faster than inland homes. Homes in areas with more vegetation or agricultural activity – like near Escondido or Poway – also tend to see faster filter loading. Annual professional maintenance should include airflow verification to confirm the system is still balanced, since duct settling and debris accumulation can shift those numbers over time. We offer maintenance service for systems we install as well as systems installed by others.
Key Takeaways
- ERVs and HRVs solve the core problem that filters alone can’t fix: insufficient fresh air exchange in a well-sealed home.
- For most San Diego homes, an ERV is the better fit due to the region’s humidity swings between marine layer and Santa Ana conditions.
- Installation typically costs $1,800 to $4,500 for residential projects, with free on-site estimates available.
- Proper commissioning and airflow balancing aren’t optional – an unbalanced system can create safety issues with combustion appliances.
- Gregory Hahn and the Redwood Heating & Air team have 13 years of San Diego HVAC experience and 428 verified reviews to back up the work.
- Multi-brand fluency across Lennox, Trane, Goodman, Rheem, and others means we integrate new ventilation equipment around what you already have.
Get a Free ERV/HRV Estimate in San Diego
If your San Diego home feels stuffy, smells stale, or you’re watching indoor humidity creep up during marine layer months, don’t assume an air purifier will solve it. The underlying issue is almost always ventilation. Redwood Heating & Air installs and services ERV and HRV systems throughout San Diego – from coastal neighborhoods like Ocean Beach and La Jolla to inland communities like Santee, El Cajon, and Poway. We diagnose the ventilation problem first and recommend equipment second, which is the opposite of how most HVAC companies approach this.
Call (844) 875-9451 to schedule your free on-site estimate. Gregory Hahn and the team at Redwood Heating & Air are ready to take a look and give you a straight answer on what your home actually needs.
Written by Gregory Hahn, Founder & Master Technician at Redwood Heating & Air San Diego, serving San Diego since 2012.