Air Filtration & Indoor Air Quality
London Ontario
London Ontario homes are sealed from November through April — five to six months where every breath recirculates the same indoor air unless you have a plan. Hawana provides complete indoor air quality services: HRV installation for continuous fresh air with heat recovery (Ontario Building Code required in new construction), ERV for homes that need to retain winter humidity, whole-home humidifiers that maintain 35 to 45 percent RH through existing ductwork, high-efficiency MERV 11 to 13 media filtration upgrades, and UV air purifiers. One company for every IAQ need. TSSA certified. BBB A+. 138 five-star reviews.
All Air Filtration & Indoor Air Quality Services — London Ontario
Every IAQ solution a London Ontario homeowner needs — one company, published pricing, TSSA certified.
HRV — Heat Recovery Ventilator
Continuous fresh air with 70–85% heat recovery. Removes CO2, VOCs, stale air. Ontario Building Code Section 9.32 compliant. Venmar, Lifebreath, Broan-NuTone. Commissioning and balancing included.
HRV Details ›ERV — Energy Recovery Ventilator
Fresh air ventilation with heat AND moisture recovery. Retains indoor humidity in winter. For homes running below 25–30% RH. Humidity assessed at every estimate. Venmar, Lifebreath.
ERV Details ›Whole-Home Humidifier
Maintains 35–45% RH throughout the home via existing ductwork. Humidistat with outdoor temperature compensation. Annual water panel replacement. Works alongside HRV or ERV.
Humidifier Details ›High-Efficiency Media Filtration
Upgrade from basic fibreglass to MERV 11 to 16 media filtration installed in the HVAC cabinet. Captures fine particles, allergens, and combustion byproducts. Furnace compatibility assessed before installation.
Filtration Details ›UV Air Purifier
UV-C germicidal light installed at the evaporator coil or in the supply duct. Prevents mould growth on the AC coil. Supplemental to filtration — not a replacement. Most useful for immune-sensitive households.
UV Details ›IAQ Maintenance Plan
Annual IAQ system inspection: HRV filter cleaning check, humidifier water panel inspection and tray cleaning, filter condition assessment. Included in the annual HVAC maintenance plan.
Maintenance Plans ›Fresh Air + Right Humidity + Clean Air — The London Ontario IAQ Standard
Whole-home indoor air quality is not one product — it is three things working together. Each addresses a different aspect of the air in your home.
💨 Fresh Air — HRV or ERV
Continuously exchanges stale CO2-laden indoor air with fresh outdoor air while recovering heat. Removes pollutants, VOCs, excess humidity (HRV), or retains some moisture (ERV). Ontario Building Code required in new homes. Without this, even the best filter just recirculates the same stale air.
💧 Right Humidity — Whole-Home Humidifier
Maintains 35 to 45 percent RH throughout the home in winter. The HRV introduces dry outdoor air — the humidifier compensates. Below 30% RH: dry skin, static, cracking wood, increased respiratory illness. Above 50%: condensation risk. A humidistat with outdoor temperature compensation manages this automatically.
🔌 Clean Air — High-Efficiency Filtration
A MERV 11 to 13 media filter captures fine particles, allergens, pollen, mould spores, and combustion byproducts that pass through a standard MERV 4 to 8 filter. Combined with an HRV's fresh air supply, high-efficiency filtration provides both clean and fresh air — neither alone is sufficient.
★ The Gold Standard London Ontario IAQ Setup
HRV
Fresh air. Heat recovery. OBC compliant. CO2 below 700 ppm. From $1,200.
Bypass Humidifier
35–45% RH maintained. Compensates for HRV moisture loss. From $550.
MERV 11–13 Filter
Fine particles, allergens captured. No excess airflow restriction. From $350.
UV Purifier (Optional)
Antimicrobial protection at coil. For immune-sensitive or high-concern households.
Kern K.'s review below describes exactly this approach applied to a 2019-built home with asthmatic children — HRV rebalanced, Aprilaire 600 added, filter upgraded to MERV 11. The whole-home approach is what made the difference, not a single product fix.
Which Indoor Air Quality Service Is Right for My London Ontario Home?
| Symptom or Situation | Primary Solution | Secondary |
|---|---|---|
| Stale air, persistent odours, drowsiness by evening | HRV — fresh air ventilation | MERV filter upgrade |
| Condensation on windows every winter | HRV — reduces indoor humidity | Reduce humidifier setpoint |
| Dry skin, static electricity, cracking wood floors | Whole-home humidifier | ERV if HRV exhausting too much moisture |
| Home below 25–30% RH despite normal occupancy | ERV (moisture-retaining) or humidifier | Humidity assessment to confirm |
| Allergy or asthma symptoms worse indoors | MERV 11–13 filter upgrade | HRV for fresh air dilution + UV purifier |
| New or recently air-sealed home, no HRV | HRV — OBC Section 9.32 required | Commission if HRV installed but not balanced |
| Post-renovation VOC off-gassing | HRV at elevated ventilation rate | MERV 13 filter upgrade |
| Mould on AC coil or musty smell from vents | UV purifier at evaporator coil | Duct cleaning, HRV for humidity control |
| Want whole-home approach — not sure where to start | IAQ Assessment — Hawana visit | All systems assessed and quoted |
Loft T.'s CO2 story below: A 1978 Old East Village home with no mechanical ventilation and 1,400 ppm CO2 by 9pm — a filter upgrade would have done nothing. The solution was an HRV. The IAQ assessment correctly identified the root cause rather than recommending a product that addressed the symptom. Call (647) 550-4220 for an assessment.
MERV Filter Ratings — What They Capture and What Your Furnace Can Handle
Higher MERV is not always better. A filter rated too high for your furnace blower restricts airflow, causing high-limit trips and reduced equipment life. Hawana assesses furnace compatibility before any filter upgrade.
| MERV Rating | Filter Type | What It Captures | Replacement | London Ontario Recommendation |
|---|---|---|---|---|
| 1–4 | Basic fibreglass | Large dust, carpet fibres | Every 1–2 months | Minimum — upgrade recommended |
| 5–8 | Standard pleated | Dust, pollen, mould spores, pet dander | Every 3 months | Good baseline — most existing systems |
| 9–11 | High-efficiency pleated | Fine dust, lead dust, auto emissions, legionella | Every 6 months | ✓ Recommended for allergy households |
| 12–13 | Premium pleated / media | Bacteria, smoke particles, sneeze nuclei | Every 6–12 months | ✓ Recommended — confirm blower compatibility |
| 14–16 | HEPA-equivalent media | Most bacteria, viruses, fine combustion | Annually | High restriction — furnace compatibility check required |
The MERV upgrade Hawana recommends most often: MERV 4 to MERV 11 or 13 for households with allergies, asthma, pets, or young children. Most modern furnaces handle MERV 11 without restriction issues. MERV 13 and above should be confirmed against the furnace manufacturer's specifications before installation. A MERV 16 filter on an underpowered blower is worse than a MERV 8 — it starves the heat exchanger of airflow and triggers high-limit shutoffs.
Indoor Air Quality Issues Specific to London Ontario Homes
London Ontario's climate and housing stock create specific IAQ challenges. Each is addressable with the right system.
CO2 Buildup in Sealed Homes
A well-sealed London Ontario home with two adults generates enough CO2 to push indoor levels above 1,000 ppm (drowsiness threshold) within a few hours of sealed operation in winter. Loft T.'s 1978 Old East Village home reached 1,400 ppm by 9pm. An HRV is the only effective solution — a filter or purifier does not remove CO2.
Very Low Winter Humidity (Below 25% RH)
Cold outdoor air at -15°C with 80% outdoor RH contains very little moisture. When this air enters a heated home and warms to 21°C, its relative humidity drops to 10 to 15%. London Ontario homes without humidification routinely run 15 to 25% RH in January, causing dry skin, static, and wood damage.
Window Condensation and Mould Risk
The opposite problem from low humidity. A home that retains too much moisture — from showering, cooking, and breathing without adequate ventilation — develops condensation on windows. Persistent window condensation leads to mould on frames and sills. An HRV removes excess humidity with the exhaust airstream.
New Home HRV Not Commissioned
Ontario Building Code requires mechanical ventilation in new homes. Builders install HRVs to meet the code, but many are never properly commissioned and balanced to the required ventilation flow rates for the specific dwelling size. Kern K.'s 2019 Summerside home had an HRV running at the wrong rates until Hawana balanced it. An unbalanced HRV meets the code on paper but not in practice.
Post-Renovation VOC Off-Gassing
New building materials release volatile organic compounds (VOCs) that peak in the first weeks after installation and decline over months. The most effective mitigation is increased fresh air ventilation — not an air purifier. Mast B.'s post-renovation situation below: HRV set to elevated ventilation rate for 60 days, MERV 13 filter added. Off-gassing odour gone in six weeks.
Pet Allergens and Fine Particle Load
Homes with dogs or cats accumulate pet dander and allergens at concentrations far above outdoor levels when sealed all winter. A standard MERV 4 to 8 filter does not capture fine pet allergens. A MERV 11 to 13 upgrade captures the particles that cause allergic reactions. Combined with an HRV's fresh air dilution, a high-MERV filter significantly reduces indoor allergen concentration.
Your Indoor Air Quality Specialist — London Ontario
Abdullah Ghzail — Lead HVAC Technician & Founder
Abdullah provides complete indoor air quality services across London Ontario and Southwestern Ontario since 2018 — with whole-home IAQ assessments because a filter upgrade for a CO2 problem does nothing and an HRV recommendation for a dry-skin problem may not be the right first step; Ontario Building Code commissioning because a builder-installed HRV at wrong flow rates is not code-compliant regardless of whether it is running; and honest product recommendations because the home with 1,400 ppm CO2 needed an HRV, not a purifier, and the home with post-renovation VOCs needed elevated ventilation, not an expensive UV system. TSSA certified. BBB A+. 138 five-star reviews.
Air Filtration & IAQ Reviews — London Ontario
138 five-star reviews — whole-home IAQ assessment on 2019 Summerside home (asthma, HRV rebalanced + humidifier + MERV 11), CO2 at 1,400 ppm in 1978 Old East Village home resolved with HRV, post-renovation VOC off-gassing handled with elevated HRV rate and MERV 13. Read all ↗
"Had Hawana do a full IAQ assessment before our first winter in our 2019-built Summerside London home — we have two children with asthma. Hawana balanced the HRV (the builder unit was running but flow rates were off), recommended an Aprilaire 600 bypass humidifier, and upgraded the filter from MERV 4 to MERV 11. First winter: our children's asthma was noticeably less problematic than in our previous home. The whole-home approach — fixing all three issues at once — made the difference."
"Our 1978 Old East Village London home had no mechanical ventilation. In winter with the windows sealed we were getting headaches and drowsiness by mid-evening. Hawana measured CO2 at 1,400 ppm by 9pm with two adults — well above the 1,000 ppm threshold. He recommended an HRV as the primary fix: not a filter or a purifier, just fresh air. Venmar HRV installed. CO2 now consistently below 700 ppm even on the coldest sealed-up January nights. The headaches are gone."
"Asked Hawana to assess our indoor air quality after a major renovation — new flooring, cabinets, paint. We were concerned about off-gassing. The technician explained that new materials release VOCs that peak in the first weeks and decline over months, and that the most effective mitigation is increased fresh air ventilation. He set the HRV to run at a higher ventilation rate for 60 days post-renovation and recommended a MERV 13 filter upgrade. Six weeks later the off-gassing odour was gone. Practical, evidence-based advice rather than an upsell to an expensive purifier."
Air Filtration & IAQ Services — Southwestern Ontario
Air Filtration & IAQ FAQ — London Ontario 2026
What services Hawana provides, why IAQ matters in London Ontario, HRV vs ERV vs humidifier explained, MERV ratings, UV purifiers, IAQ assessment, OBC ventilation requirements, and London Ontario specific issues.
Indoor Air Quality Assessment in London Ontario
HRV from $1,200 · ERV from $1,300 · Humidifier from $550 · MERV filter from $350. Whole-home IAQ assessment — humidity, CO2, ventilation, filtration. The right solution for the actual problem, not the most expensive product. TSSA certified. BBB A+. 138 five-star reviews.
Air Filtration Services — Detail Pages
💨 HRV — Heat Recovery Ventilator
Fresh air ventilation. OBC compliant. 70–85% heat recovery. From $1,200.
💨 ERV — Energy Recovery Ventilator
Fresh air + moisture retention. For dry winter homes. From $1,300.
💧 Whole-Home Humidifier
Aprilaire bypass, fan-powered, steam. 35–45% RH. From $550.
🔥 Heating Services
Furnace, heat pump, gas line, ductwork. All heating services London Ontario.
📋 Maintenance Plans — $149/yr
Annual HRV, humidifier, and HVAC inspection. No monthly subscription.
🔥 Furnace Services
IAQ systems work with your furnace. Repair, install, maintain.
