Exhaust Fan Replacement (existing circuit)
Handis bathroom exhaust fan replacement is the same-day swap on the existing 120V circuit and the existing venting run to the soffit or roof cap — Panasonic WhisperCeiling, Broan Sense, Delta Breez, and same-footprint drop-in replacements — from $350 for a basic fan-only drop-in on a clean opening to $900 for a heat-light-fan combination on the existing circuit with a new dedicated switch and a tested flow rate that meets Seattle bath-code. The 1990s fan that sounds like a leaf blower for two minutes after the switch is off and never actually moved enough air. The Nutone unit that has been buzzing and chattering for three years and still has not been replaced. The bath that has visible mildew in the corners of the ceiling because the fan has not really been pulling moisture for at least a decade. Two to three hours per fan. Circuit shut-off at the breaker, voltage verified dead, new fan housing seated on the existing rough opening, reconnected to the existing duct, flow-tested against a 50 CFM minimum. Honest scope on anything new — a new circuit, a new venting run, a new roof cap, or any structural framing to enlarge the ceiling opening routes to a licensed electrician for the circuit and a Handis or roofer for the venting and roof work.
Service
How a Like-for-Like Exhaust Fan Swap Works
Six sequential steps from circuit shut-off to CFM flow test — the actual sequence on every like-for-like bathroom exhaust fan replacement.
Confirm Existing Fan, Circuit, and Venting from a Booking-Call Photo
Phone photo of the existing fan grille (cover removed if accessible) and any visible duct connection at the fan body, sent on the booking call. Confirms fan footprint (most 1990s onward are 10 inch by 10 inch standard), housing brand (Broan, Nutone, Panasonic), existing duct size (3 inch or 4 inch), and visible wiring condition. Confirms whether the swap is truly like-for-like or whether a new circuit or new venting run is needed.
Shut Off Circuit at the Breaker, Verify Dead with a Tester
Circuit shut off at the breaker panel. Voltage verified dead at the fan junction with a Klein non-contact voltage tester before any wires are touched. Bath fan circuits sometimes share a circuit with the vanity light or the receptacle, so we test at the fan junction and not just at the switch.
Remove the Existing Fan
Existing grille removed (most pop off with two spring clips). Fan motor unplugged from the housing connector or wire-nutted off if hardwired. Old fan body or motor lifted out through the ceiling opening. If the existing housing is damaged or non-standard, the housing comes out through the ceiling opening too; same-footprint replacement housing seated in next.
Install the New Fan Housing or Drop-In Motor
New fan housing or new motor seated on the existing rough opening. Mounting screws secured to the existing joist or to the housing bracket already in place. Electrical connections made with new wire nuts and a fresh ground bond, white-neutral and black-hot matched per the new fan wiring diagram.
Reconnect to the Existing 3-Inch or 4-Inch Duct
New flexible duct collar clamped onto the existing duct that runs from the fan to the soffit or roof cap. We never connect a 4-inch fan to a 3-inch duct without a transition (it strangles the flow rate); if the existing duct is 3-inch on a 4-inch fan we install a same-visit transition or flag it as a recommended upgrade. Duct insulation (where present) re-wrapped to prevent condensation drip.
Power Back On, CFM Flow Test, Switch Test
Breaker back on. Switch tested. Fan run for 2 minutes to confirm it spins up clean with no buzz or chatter from the new motor. Flow test at the grille face with a basic anemometer to confirm the fan is delivering rated CFM through the existing duct (anything below 50 CFM on a single bath fails Seattle residential bath code and flags a duct cleanout or duct upgrade recommendation). Final ceiling caulk seal where the grille meets the ceiling.
Bathroom Exhaust Fan Replacement Pricing
Final pricing is labor plus any condition-driven adders. Fan kit cost depends on brand and configuration (owner-supplied is fine). A new circuit, new venting run, new roof cap, or structural framing routes to a licensed electrician for circuit work plus Handis or a roofer for venting and roof scope as transparent line-item adders. Request a free estimate for an accurate quote.
Send phone photos of the existing fan grille and any visible duct connection — we will confirm like-for-like scope and quote before booking.
Why Handis for Exhaust Fan Replacements
Most bath exhaust fans we are asked to replace are doing two jobs they were never rated for — they are too small for the bath square footage (a 50 CFM rated motor on a 100-square-foot master bath that needs 100 CFM), they are connected to a duct that has been pulling 30 percent of the rated airflow because the duct was crushed in the attic ten years ago, and they are mounted in a ceiling opening that has never been sealed against the conditioned-to-attic air leak around the fan body. The drop-in swap fixes the loud-and-not-pulling-air motor. The duct upgrade fixes the flow rate. The ceiling caulk seal fixes the air leak. Most homeowners come away from a single visit with a bathroom that ventilates correctly for the first time since the house was built. The honest line on new circuits and new venting is on the booking call — those route to the licensed electrician and the venting installer, and the scope is named separately on the quote.
Estimate
Send us a phone photo of the existing fan grille (cover removed if you can) and any visible duct connection at the fan body in the attic if you can access it. Tell us the new fan (brand and model if you have picked — Panasonic WhisperCeiling, Broan Sense, Delta Breez are common Seattle choices — or owner-supplied), the bath square footage (or rough size), and any known issues — noise, slow ramp-up, condensation on the ceiling around the grille. We send a written quote with any electrician or venting sub scope called out separately when applicable.
Customer Reviews
Bathroom exhaust fan replacement reviews from real Handis customers.
1996 Nutone fan in our master bath sounded like a small aircraft. Sent Handis a photo of the grille, they confirmed it was a standard 10 by 10 footprint, ordered a Panasonic WhisperCeiling. Swap took about two hours on the existing circuit and existing 4-inch duct. You can barely hear it now and the moisture clears off the mirror in five minutes.
Heat-light-fan combo in our hall bath for cold winter mornings. The existing circuit supported the load (tech confirmed before ordering), new three-position switch went on the existing wiring topology. Total visit was about three hours. Everyone uses the heat function on cold days now.
Old fan was 50 CFM rated but the tech's flow test only got 28 CFM at the grille — the duct in the attic was 3-inch and partially crushed. Tech installed a 3-to-4-inch transition, cleaned out about a decade of lint, and the new Panasonic gets a clean 92 CFM. Bathroom actually ventilates now.
Fan-with-light combination in our guest bath. The existing switch was a dual-pole that already supported separate fan and light controls, so the drop-in went clean. Tech sealed the grille to the ceiling with silicone — apparently the old install just had a gap that was leaking attic air all winter.
Two bathroom fans replaced in one visit — master and hall bath. Tech sequenced them, one trip charge, three and a half hours total. Both were Panasonic drop-ins on existing circuits and existing 4-inch ducts. House is noticeably quieter now and the mildew on the ceiling around both fans has not come back.
Frequently Asked Questions
Common questions about like-for-like bathroom exhaust fan replacements.