RenewAire Aeri MT (ET-255MF-P340-XC0)

At a glance

• In its favour
• Plain fact
• Worth knowing
• Not stated by the maker

• In its favour: HVI-certified (HVI 2005351)Its airflow and efficiency were tested to the Home Ventilating Institute’s standard.
• Plain fact: 239 cfm at 0.4 in., 231 cfm at 0.5 in. of duct pressureCertified fresh air delivered, at HVI’s headline rating point and at the higher pressure many real ducts run at.
• In its favour: RenewAire’s own CO₂ control (CO2-W or CO2-D) is listed for the Aeri MTIts manual says the sensor can run the unit or trigger Boost, and a switch between its 24VAC and HIGH terminals runs boost while it stays closed. Set it to 750.
• Plain fact: How it handles frost in very cold weatherNo defrost cycle. The Aeri brochure says the unit needs no frost protection or condensate pans. RenewAire's frost policy says its plate cores work without condensing or frosting when it is warmer than -10°F outside and indoor humidity is below 40%. For harsher conditions RenewAire points to standard defrost methods; an RH series electric duct heater (1-8 kW, indoor ductwork only) is listed as an optional accessory.

Certifications

• HVI certified

  HVI 2005351

  The Home Ventilating Institute tested its airflow and heat recovery. The certified numbers on this page come from its directory. Find HVI 2005351 in HVI’s directory

• ENERGY STAR (Canada)

  Not on the list

  Not on Natural Resources Canada’s ENERGY STAR list when we checked. ENERGY STAR certifies HRVs and ERVs only in Canada, so a unit sold in the U.S. may never have been submitted; that isn’t a sign it’s less efficient. Its HVI numbers show its heat recovery and fan power. NRCan’s ENERGY STAR list (checked October 19, 2026)

Would it cover your home?

Tell it who sleeps in each bedroom. It’s checked against the 800 ppm goal the same way the app checks a unit an installer quotes.

Certified airflow

How much fresh air it delivers as the ducts push back. More duct pressure, less air: that’s why the installer’s duct design matters as much as the unit.

Lowest steady airflow (maker)

35 cfm

Highest airflow (maker)

255 cfm

Heat and moisture recovery

Sensible recovery (SRE) is the share of heat kept in winter, after the fan’s own heat is taken out; total recovery (TRE) counts moisture too, in summer.

• Plain fact: Keeps 63–73% of the heat at 32°FAcross the airflows HVI tested.
• Not stated by the maker: No very-cold (−13°F) test in the HVI directory
• Plain fact: Total recovery in summer: 37–56% at 95°FThe share of heat and moisture kept out on a hot, humid day.

HRV or ERV: which fits your home?

Turning up on CO₂

A CO₂ control can switch it to a higher speed when the bedroom needs air, then back. HouseExhale’s setting: up at 750 ppm, back at 650, never above 800.

• In its favour: RenewAire’s own CO₂ control (CO2-W or CO2-D) is listed for the Aeri MTIts manual says the sensor can run the unit or trigger Boost, and a switch between its 24VAC and HIGH terminals runs boost while it stays closed. Set it to 750.

What RenewAire documents

• In its favour: Its own CO₂ control: CO2-W (wall) or CO2-D (duct)A relay that runs the unit on high above its trip point. Documented for the EV90, EV130, EV200, EV Premium and EV Premium+.
• In its favour: The trip point can be set from 500 to 1,500 ppmSo 750 is fine. The gap before it switches back can be 25 to 200 ppm. The factory setting isn’t published: check it.
• Plain fact: EV Premium: a contact between 24VAC and HIGH runs it on highWhen CO₂ drops it goes back to normal, or turns off if it was installed that way. Ask for normal.
• Worth knowing: EV90 and EV130: unpowered controls onlyNever connect power to their control terminals. On these the contact may switch the unit on and off, not up: ask.

Four ways to make it turn up by itself

• Its maker’s CO₂ controlMade for it

  RenewAire’s CO2-W or CO2-D, set to switch at 750 ppm, with the unit staying on its normal speed below that.

• A CO₂ control on its high-speed inputAsk your installer

  Its HIGH terminal takes an external control; RenewAire’s own sensor is the documented one.

• A night scheduleAsk your installer

  A timer on the HIGH input, or its touchscreen control on the EV Premium+.

• Your monitor and a smart-home relayAsk your maker first

  A dry-contact relay on the same HIGH input. Not documented by RenewAire.

How to add CO₂ control to an HRV or ERV · CO₂ controls

Installing it

The maker’s facts an installer plans around. Your installer confirms them for your home.

Power

120 V, 60 Hz, single phase, 3.6 A (manual). Submittal: 130 W, 1.8 A per motor, 15 A circuit; it also lists 22 to 160 W across the five airflow settings. Comes with a 34 in plug-in cord and needs a grounded 120 V outlet nearby.

Duct connections

Four duct connections on top, with pre-installed Snap-N-Go collars for flexible duct: two 6 in round collars for the outdoor-air and return inlets, and two oval collars equal to 6 in for the supply and exhaust outlets. All four ducts point up. Every duct run must be at least 40 in long.

Size

26 1/2 in high x 32 5/8 in wide x 13 3/4 in deep

Weight

25 lb (30 lb maximum in its shipping carton, 34 x 14.5 x 30 in). The cabinet is EPP foam.

Mounting

Upright only, per the manual and spec sheet: hung on a wall (across two studs, or a 3/4 in plywood panel on two studs), hung from joists on chains, or set on the floor or a shelf on its feet. Leave at least 18 in for wiring and control access; a floor install needs at least 51 in of total height. The submittal instead says "Can be mounted in any orientation" (see notes).

Drain line

No drain line needed: the product page says "No condensate drain required."

Cold weather

No defrost cycle. The Aeri brochure says the unit needs no frost protection or condensate pans. RenewAire's frost policy says its plate cores work without condensing or frosting when it is warmer than -10°F outside and indoor humidity is below 40%. For harsher conditions RenewAire points to standard defrost methods; an RH series electric duct heater (1-8 kW, indoor ductwork only) is listed as an optional accessory.

Balancing the airflow

Five smart constant-volume airflow setpoints

Ducts

Dedicated; verify IOM for central-HVAC integration

In the box

The unit with four snap-in collars (two 6 in round, two 6 in-equivalent oval), a 34 in power cord, two MERV 8 filters, and a unit bracket/cleat. Support chains, S-hooks and vibration isolators are not included.Scope: the chain and S-hook exclusions are from the Aeri MT spec sheet and manual

Controls

Humidity control

Not confirmed

Bathroom boost

Not confirmed

Works without the internet

Documented

CO₂ inputs

Dry-contact input

Owning it

Equipment price

Not stated in the sources we found

Rebates

Federal tax credits ended for work after 2025. Some states and utilities still pay toward an HRV or ERV: rebates by state.

Filters

• Type: One spun-polyester filter in the outdoor air and one in the return air (the manual calls them mesh-type anti-microbial filters). An optional pleated MERV 13 for the outdoor air side ships loose.
• MERV: MERV 8 standard; MERV 13 optional (outdoor air side only)
• Size: 10 1/2 x 10 1/2 x 1 in (two)
• How often: Manual: replace both filters every 3 months, or more often if needed; don't clean them.

Warranty

• Core: 10 years (structural and performance) on the plate core. The warranty statement says that in years 3 to 10 a defective core is repaired or replaced at no charge, labor not included.
• Parts: 5-year unit warranty. The statement says five years from the date of manufacture.
• Motor: No separate motor warranty is stated.
• Labor: Not covered ("THIS WARRANTY DOES NOT INCLUDE LABOR").
• Conditions: The unit must be installed and run per RenewAire's instructions and maintained. Keep proof of the installation date; without it, coverage starts 30 days after manufacture. Registration is not required. Damage from improper installation voids it (Aeri manual).

Scope: terms beyond '10-year core / 5-year unit' are from RenewAire's general warranty statement (https://renewaire.com/wp-content/uploads/2025/05/ERV_warranty_0525.pdf)

Sound

RenewAire publishes sound power (how much sound the unit gives off), not a sones rating, from its own tests (AHRI 230/260, ISO 9614). Cabinet: 30 dBA at 35 CFM, 47 dBA at 150 CFM, 53 dBA at 255 CFM. At a room supply outlet fed by 5 ft of insulated flex duct: 27, 45 and 54 dBA at 35, 150 and 255 CFM. At a room return fed by 5 ft of flex: 26, 40 and 45 dBA. These are not loudness at a set distance.

Availability

Active (the only model on RenewAire's Aeri series page)

RenewAire’s page for the ET-255MF-P340-XC0 (opens in a new tab)

Not known yet

What we couldn’t confirm from the maker or HVI. Ask the installer, and get it in writing with the quote.

• How it protects itself from frost in very cold weather
• Exactly how it responds to a CO₂ control
• A current equipment price

Where the maker’s own documents disagree

• Mounting: the Aeri MT submittal says "Can be mounted in any orientation", but the manual, spec sheet (09/25) and brochure (05/26) say upright only (wall, floor/shelf, or chain-hung).
• Power conflict inside the submittal: the electrical table says 130 W, but the setpoint table lists up to 160 W. The manual gives 3.6 A.

Other sizes and similar units

Other ERVs with similar airflow

• Panasonic BalancedHome Elite Plus+ 210 (FV-21VEC1S)

  ERV · HVI 2005488

  210 cfm at 0.5 in.

• 

  RenewAire EV Premium M

  ERV · HVI 2004872

  210 cfm at 0.5 in.

• S&P TReN200

  ERV · HVI 2005459

  210 cfm at 0.5 in.

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