| 1. Compact Apartment HRV | Studios and one-bedroom apartments up to approximately 900 sq. ft. | 50–120 CFM; variable-speed operation preferred | Up to approximately 80% | Low-speed continuous ventilation, boost mode, timer, and basic wall control | Short insulated ducts; exterior intake and exhaust terminals; condensate management where required | Inspect filters every 3 months; replace or wash according to filter type and manufacturer guidance | Cold or mixed climates with limited mechanical-room space |
| 2. Small Home HRV | Single-family homes of approximately 900–1,500 sq. ft. | 80–160 CFM at normal operating speed | Approximately 75–85% | Two or more fan speeds, boost switch, defrost cycle, and washable or replaceable filters | Balanced supply and exhaust ducting; accessible service panel; proper outdoor hood spacing | Quarterly filter inspection and annual core and fan cleaning | Cold, dry, or mixed climates |
| 3. Medium Family-Home HRV | Homes of approximately 1,500–2,500 sq. ft. with three to four bedrooms | 120–220 CFM; capacity should be selected from calculated airflow demand | Approximately 75–85% | Digital controller, humidity sensing, boost mode, and programmable scheduling | Dedicated ducts or carefully balanced central duct integration; vibration isolation recommended | Inspect filters every 3 months; clean the heat-exchange core at least annually | Cold and mixed climates where indoor humidity control is important |
| 4. Large Home HRV | Homes larger than 2,500 sq. ft. or properties with high occupancy | 180–350 CFM, subject to room-by-room ventilation calculations | Approximately 75–85% | Multi-zone control, demand ventilation, vacation mode, and low-temperature protection | Longer duct runs require proper sizing, balancing dampers, insulation, and commissioning | Inspect filters quarterly; verify airflow balance and clean the core annually | Cold climates and energy-efficient, airtight homes |
| 5. High-Efficiency Passive-House HRV | Very airtight homes designed for low energy consumption | 100–250 CFM with precise low-flow control | Approximately 80–95% sensible heat recovery | Continuous low-speed operation, advanced scheduling, remote monitoring, and commissioning data | Highly insulated ductwork, minimal pressure loss, airtight connections, and professional balancing | Use the specified fine-particle filters; inspect more frequently during construction or renovation | Cold climates and high-performance building envelopes |
| 6. Renovation-Friendly HRV | Existing homes where new dedicated ductwork is difficult to install | 60–180 CFM depending on available duct routes | Approximately 65–80% | Simple wall control, boost switch, frost protection, and adjustable airflow settings | Use existing ducts only after confirming cleanliness, capacity, pressure, and airflow direction | Check filters every 1–3 months during renovation; inspect ducts for dust and debris | Retrofit projects and mixed climates |
| 7. Quiet Bedroom-Focused HRV | Homes, apartments, and care spaces where low sound levels are a priority | 80–200 CFM with airflow distributed at low velocity | Approximately 70–85% | Night mode, insulated cabinet, electronically commutated motor, and remote boost control | Install away from bedrooms where possible; use flexible connectors and acoustic duct treatment | Clean filters regularly because clogged filters increase fan noise and energy use | Bedrooms, libraries, studios, and noise-sensitive buildings |
| 8. Humidity-Control HRV | Buildings with condensation, winter humidity, or variable occupancy concerns | 100–250 CFM with automatic demand control | Approximately 70–85% | Relative-humidity sensor, automatic boost, frost control, and outdoor-air temperature monitoring | Provide a condensate drain where specified; protect cold ducts from condensation with continuous insulation | Inspect filters and condensate components every 3 months; verify sensor operation annually | Cold climates and tightly sealed homes with moisture problems |
| 9. Small Commercial HRV | Small offices, classrooms, clinics, and retail areas | 250–1,000 CFM based on occupancy and applicable ventilation standards | Approximately 60–80% | CO₂ or occupancy-based control, building-management integration, alarms, and scheduled operation | Commercial duct design, access panels, fire and smoke damper coordination, and professional commissioning | Filter inspection monthly to quarterly, depending on outdoor air quality and operating hours | Commercial buildings requiring continuous outdoor-air ventilation |
| 10. High-Outdoor-Air HRV | Buildings requiring substantial fresh-air intake or enhanced indoor-air quality | 300–1,500+ CFM, selected by occupancy, floor area, and code requirements | Approximately 60–85% | Multi-stage filtration, variable-speed fans, frost protection, demand control, and remote alarms | Requires engineered ductwork, adequate service clearance, weatherproof intake and exhaust placement, and airflow testing | Monitor pressure drop; replace filters before restriction affects airflow or fan performance | Schools, offices, healthcare support spaces, and densely occupied buildings |