Lomanco Attic Fan: 5 Models, Parts, Repair & Buying Guide
Lomanco has been manufacturing roof-mounted ventilation products for decades, and their attic fans remain a popular choice among homeowners looking to reduce attic heat buildup and protect their roof structures. Whether you're shopping for a new Lomanco attic fan, tracking down a replacement motor, or trying to figure out why your current unit stopped spinning, getting the right information saves you time and money.
At Whole House Fan, we've spent over 23 years helping homeowners find the right ventilation solutions, from attic fans to whole house fans that cool your entire living space. We know this product category inside and out, and we've put together this guide to help you navigate Lomanco's current lineup with confidence.
Below, you'll find a breakdown of 5 Lomanco attic fan models, along with practical advice on sourcing parts, handling common repairs, and deciding whether a Lomanco unit is the right fit for your home.
1. Quiet attic fans from Whole House Fan
Before you commit to a Lomanco attic fan, it's worth knowing that Whole House Fan carries quiet, insulated attic fans built for modern homes that demand low noise and high efficiency year-round.
What it is and how it compares to Lomanco
Whole House Fan's attic fans use insulated motor housings and thermostatic controls to move hot air out of your attic quietly. Unlike many standard power vents, they run at 40-52 decibels, making them noticeably quieter during both daytime and nighttime operation.
When this option makes more sense than a Lomanco unit
If you live in a neighborhood with noise ordinances or have bedrooms positioned near attic access areas, a quieter unit pays off fast. You'll also benefit if your attic regularly exceeds 130°F in summer and needs sustained, reliable airflow to protect insulation and roofing materials.
Switching from a standard power vent to a quiet insulated fan can cut attic temperatures by 30-50°F on peak summer days.
Sizing basics for your attic and home
Match the fan's CFM rating to your attic square footage, using roughly 0.7 CFM per square foot as your baseline. A 1,500-square-foot attic needs at least 1,050 CFM to cycle hot air effectively throughout the day.
Install notes and ventilation balance
Most units arrive pre-assembled and require standard wiring connections that a confident DIYer can handle in about an hour. You need adequate passive intake venting (soffit or gable vents) to balance airflow and prevent the motor from overworking.
Maintenance and common issues to avoid
Check the motor and blade assembly once per season for dust buildup and debris accumulation. Blocked intake vents are the most common cause of reduced performance, so clear them before assuming the motor itself is failing.
What it typically costs and how to buy
You can find attic fans ranging from $150 to $400 at Whole House Fan, depending on CFM output and included features. Every purchase comes with a 60-day money-back guarantee and free lifetime customer support, so you're covered well beyond the install date.
2. Lomancool 2000 roof power vent
The Lomancool 2000 is a popular option in the lomanco attic fan lineup, offering reliable powered ventilation through a compact roof-mounted design built to handle demanding summer heat.
What it is and how it works
This unit mounts directly on your roof sheathing and uses an electric motor to exhaust superheated attic air through a low-profile dome. Thermostatic control activates the fan automatically once temperatures hit a set threshold.
Best-fit situations and roof types
The Lomancool 2000 suits standard asphalt shingle roofs with pitches between 3/12 and 12/12. You'll get the strongest results in climates with long, hot summers where sustained airflow matters most.
Airflow, CFM, and how to match it to attic size
This model delivers roughly 1,500 CFM, covering attics up to about 2,150 square feet using the standard 0.7 CFM-per-square-foot rule.
For larger attics, install two units rather than pushing a single fan beyond its rated capacity.
Thermostat and humidistat options to look for
Look for models with an adjustable thermostat set between 100-110°F. A built-in humidistat adds useful moisture control during winter months.
Common failures and quick troubleshooting steps
Motor burnout and seized bearings are the most frequent problems. Check capacitor function first before committing to a full motor replacement.
What it typically costs and where to buy
Budget $80-$150 for the unit itself. Home improvement retailers and major online platforms carry the Lomancool 2000 along with compatible replacement parts.
3. Lomanco 1800 gable mount ventilator
The Lomanco 1800 gives you a solid gable-mounted option within the lomanco attic fan lineup, letting you move hot attic air without touching your roof surface at all.
What it is and how it works
This unit mounts inside your existing gable vent opening and uses an electric motor to exhaust hot attic air directly through the gable wall, skipping any roof penetration entirely.
When gable mount beats roof mount
Choose this setup when your roof pitch is steep or your shingles are aging and you want to avoid cutting new openings. Installation is also faster without flashing or sealant work.
Gable mounting eliminates flashing concerns entirely, which reduces long-term leak risk on older roofs.
Fitment checks before you buy
Measure your gable vent rough opening before ordering. Verify both width and height since the 1800 fits standard openings but tight clearances can cause fitment problems.
Noise, vibration, and weather protection tips
Mount the unit with rubber isolation grommets to cut vibration transfer into your framing. Add weatherstripping around the frame to block wind-driven rain from working its way inside.
Common parts that wear out first
Motor bearings and blade assemblies fail first on most gable fans. Keep a spare capacitor on hand since it is a low-cost fix when the motor refuses to start.
What it typically costs and where to buy
Budget $60-$120 for the unit itself. Home improvement retailers and major online platforms carry both the fan and common replacement parts.
4. Lomanco solar attic vent
The Lomanco solar attic vent runs entirely on sun power, eliminating wiring costs and reducing your operating expenses to near zero over the fan's lifespan.
What it is and how it works
This unit mounts on your roof surface and uses an integrated solar panel to power a DC motor that exhausts hot attic air during daylight hours without any grid connection.
When solar makes sense and when it does not
Solar works well in sunny climates with consistent direct exposure. It underperforms in regions with frequent overcast days or heavily shaded roof sections.
If your roof gets fewer than five hours of direct sun daily, a corded power vent will serve you better year-round.
Panel placement, sun exposure, and expected runtime
Position the panel on a south-facing roof slope for maximum output. Expect 6-8 hours of runtime on clear summer days with full exposure.
What to check for in battery and controller setups
Some models include a small battery backup for continued operation during brief cloud cover. Check that the charge controller prevents battery overcharge and extends overall battery life.
Maintenance and common performance issues
Clean the solar panel surface twice per season to remove dust and debris. Dirty panels can cut output by 20-30% without showing any obvious signs of damage.
What it typically costs and where to buy
Budget $150-$300 for a standard unit. Home improvement retailers and major online platforms carry both the fan and compatible replacement panels.
5. Lomanco parts and repair basics
When your lomanco attic fan stops performing, knowing which part failed saves you from replacing the entire unit unnecessarily. Identifying the right component before ordering cuts both downtime and cost.
How to identify your Lomanco model and part numbers
Find your model number on a label inside the fan housing near the motor mount. Use that number on Lomanco's official product documentation to match exact replacement specs.
Motors, capacitors, and fan blades
Check the capacitor first when the motor hums but refuses to spin. Fan blades show wear through visible cracks or wobbling during operation.
Thermostats, humidistats, and wiring basics
Replace a faulty thermostat when the fan runs continuously or never starts. Verify wiring connections are tight and corrosion-free before swapping any control component.
A loose wire connection causes more thermostat failures than the thermostat itself.
Domes, flashing, and leak prevention checks
Inspect your dome seal annually for cracking or lifting edges. Compromised flashing around the base is the leading cause of attic water intrusion near power vents.
Repair vs replace decision checklist
Replace the unit when motor replacement costs exceed 60% of a new fan's price. Repair when only single components like capacitors or thermostats have failed.
Where to source parts and how to avoid mismatches
Always use your model number when ordering to confirm compatibility. Major home improvement retailers and online marketplaces carry most Lomanco replacement components.
Next Steps
You now have a clear picture of the main lomanco attic fan models, what parts wear out first, and when a repair makes more sense than a full replacement. Whether you go with a Lomanco unit or a quieter alternative, the key is matching CFM output to your attic size and keeping your intake ventilation balanced from the start. Skipping that balance check is the most common reason a new fan underperforms right after installation.
If noise or long-term reliability matters more to you, the quiet insulated attic fans from Whole House Fan are worth a close look before you commit. Every purchase includes a 60-day money-back guarantee and free lifetime customer support, giving you real protection well after the install is complete.
Take the next step by browsing the full selection of attic fans and whole house ventilation systems at Whole House Fan. Getting the right unit in place this season means your attic stays cooler and your energy bills stay lower all summer long.