Installation of a GREE FreeMatch R32 2-head heat pump in Saint-Sébastien (Haut-Richelieu RCM)

What the filter does not protect: the real cleaning of a wall-mounted unit

This summer, we installed a GREE FreeMatch R32 system with two heads in Saint-Sébastien, in the Haut-Richelieu RCM. The photo from this installation shows a freshly installed indoor unit in a house that is still under construction. It is a good opportunity to discuss what will happen to this unit in five years, because this is the least well-documented subject in the entire industry.

We have already published them, and we will not rewrite them here:

• the smell when air conditioning is first started, biofilm on the fins and in the drain pan, and drying in fan mode after the season — Sainte-Marthe;
• the filter, what it is (a protective screen for the coil, not an air purifier), the pressure-drop trap, and reading the filter as a diagnostic tool — Bois-des-Filion;
• rinsing the filter and what happens to a unit operated without it — Vimont;
• cleaning the outdoor coil, the five permitted actions and the six that cause damage, and what an annual visit includes — Pierrefonds-Roxboro.

What has never been written about is the operation itself: what is washed, with what, how the home and the unit are protected, and what determines whether the unit stays on the wall or not.

The tangential wheel, the part no one shows

Behind the coil of a wall-mounted unit is a tangential fan — a long blade roller, as wide as the unit. This type of fan is used precisely because it produces an even airflow across the entire width of a long, shallow outlet. The air passes through the blade wheel twice, and the airflow organizes itself around an eccentric vortex parallel to the axis. It is an efficient geometry for the shape of a wall-mounted unit, and it is also a geometry that accumulates dirt.

The reason is simple, and it explains everything else: the wheel is downstream of the coil. It therefore operates in air that has just been cooled, its blades become cold, and a cold surface in humid air is an excellent condensation surface. A damp blade holds onto particles that a dry blade would let pass. The filter, meanwhile, is upstream: it does not protect anything that settles behind it.

That is why rinsing a filter—a useful step that should be done and that we teach at every installation—never reaches the wheel. GREE states this in its own guide for contractors: you need to look for the dust film on the wheel's surfaces, and “even a light accumulation can impair system performance.”

We must be honest here about what the documentation does not contain. We found no published measurement of the airflow or capacity lost because of a fouled tangential wheel—not from a manufacturer, a standards organization, or a study. What does exist concerns fouling of coils in ducted systems: a study by Lawrence Berkeley National Laboratory concludes that a typical coil becomes fouled enough to double the pressure drop in seven to eleven years, with efficiency and capacity degradation “generally less than 5%,” but much greater in marginal systems or extreme conditions. This is a useful analogy, not a measurement for a wall-mounted head, and we say so rather than converting a figure from one object to another.

A field test, meanwhile, can be documented and performed with a flashlight: shine the light on the fins from the back. If the light passes through clearly, the coil needs only light cleaning. If it is blocked, you need to go further.

Cleaning in place or removing it: three operations that are constantly confused

This is the point about which homeowners receive the most contradictory information. There are three distinct operations, and two of them have nothing to do with the refrigeration circuit.

1. Deep cleaning in place

The head remains attached to its mounting plate. The panel, filters, louvers, and then—in the full version—the electrical box are removed from it, and the coil is moved aside far enough to extract the wheel. The refrigeration circuit is never opened.

This is not an entrepreneur's trick: it is the manufacturer's procedure. The service manual for a Mitsubishi Electric wall-mounted head literally describes unfastening the electrical box from its attachments and removing it, loosening the screw securing the tangential fan, releasing the motor bracket's hooks, then “lifting the heat exchanger and extracting the tangential fan downward to the left.” The heat exchanger is lifted, not disconnected. GREE also presents its own method as cleaning done “without the hassle and time of a complete unit removal.”

2. Removing the head from its mounting plate

A wall-mounted head is simply hooked onto a mounting plate. Installation manuals describe how to check that it is properly engaged by moving it laterally, and how to release it from the lower corners. Unhooking it does not open the circuit. As long as the available piping length permits it and the unit is supported, the connections remain intact.

Here we are adding a clarification rather than contradicting what we published in Mercier about the drywall joint that meets the unit: what makes this joint impossible to finish is not that the head could never be unhooked, but that it is not unhooked just to apply joint compound—the piping slack is short, flare connections do not tolerate repeated flexing, and two sealed connections are not put at risk for a strip of drywall compound.

3. Taking the head away

That is the point, and the only point, at which the circuit is opened. Removing the unit from the wall to take it away requires a pump-down—the Mitsubishi manual puts it this way: “when relocating or disposing of the air conditioner, perform a pump-down of the system so that the refrigerant is not released into the atmosphere”—followed by disconnecting the flare connections, then evacuating the system again during reassembly.

In Québec, this moves the operation into another category: handling halocarbon refrigerants requires the certification provided for under the Regulation respecting halocarbons, as we explained in detail on our Noyan page. A low-priced “deep cleaning” offered by someone who takes away your indoor unit is not a cleaning service; it is refrigeration work.

The cleaning bag, and why a head cannot be rinsed like an outdoor unit

Outside, you rinse with water, against the airflow, and the water falls onto the ground. Inside, it falls onto a wall, a floor, and sometimes an electrical outlet.

The tool that solves this problem exists and is distributed by industry wholesalers: a cleaning bag (mini-split bib), a heavy-duty plastic skirt with heat-welded seams, mounted on adjustable supports beneath the unit, that channels the water and cleaning product into a funnel, a hose, and a bucket. Common models fit heads up to approximately 44 inches wide. We should clarify what we did not find: no standard or association makes this accessory mandatory, and no source publishes a typical recovered water volume. What is documented is the principle: HVAC system cleaning standards require controlling the dispersion of contaminants released by the cleaning operation itself. The bag is the practical application of this principle for a wall-mounted head.

Practical consequence for the customer: deep cleaning is a wet operation in an occupied room. It must be organized, the area must be protected, and it takes as long as it takes.

Water, the circuit board, and the A2L sensor

On the Japanese-designed wall-mounted units we service, the electrical box is typically located on the right side of the unit—we verified this on one model family and will not extend it to all brands. This is the area that determines whether a cleaning job ends well.

Manufacturers are clear about the danger, even when discussing something else. One installation manual requires the electrical cover to be securely fastened; otherwise, “dust, water, etc. could accumulate inside the unit and cause a fire or electric shock”. GREE's owner manuals, for their part, are categorical for occupants: “do not wash the air conditioner with water to avoid electric shock”, and the unit must be de-energized before any maintenance. This statement is addressed to the owner, not the technician—but it says exactly why washing an indoor coil is not a weekend job.

And since the arrival of R-32, a new element changes the protocol, and it is the most useful information in this entire section. Indoor units equipped with an A2L refrigerant detection sensor have an autonomous mitigation logic. One manufacturer's installation manual states it plainly:

“Beware of fan rotation when the circuit breaker is on. When the refrigerant sensor detects a leak, the fan starts rotating automatically.”

In other words: a unit turned off with the remote control may start its fan on its own. We published in Vimont that rinsing a filter is done by switching it off with the remote control rather than at the exterior disconnect. This rule remains correct for a filter. It does not apply when hands are inside the enclosure: in that case, switch it off at the circuit breaker and lock it out.

Two other verified instructions are worth knowing: the same manual warns that the sensor may react to aerosols present in the environment and display a leak error—a poorly chosen spray cleaner could therefore trigger an alarm on a perfectly healthy unit. And: “do not apply any agent to the drainage opening”, or damage may result.

We will not go any further on A2L. As we established in Saint-Césaire, the absence of a published directive is itself verified: no one—neither manufacturer nor organization—publishes a washing protocol for use near an A2L sensor. We therefore apply the prudent rule and ask the manufacturer rather than inventing the answer.

The products: what is documented and what is not

The clearest rule comes from a manufacturer, as stated in the trade press: a non-acidic, low-pressure cleaner followed by rinsing. Carrier Canada adds what not to do: a solution of mild detergent and water is suitable; highly acidic cleaners attack the copper and alloys in the coil and can cause corrosion; and a pressure washer damages the fins.

GREE manuals add prohibitions concerning the occupant: no volatile liquids—thinner, gasoline—which damage the finish; no corrosive liquid detergent; and for filters, never use chemicals, which may damage the media or leave residue on it.

Regarding the very popular “no-rinse” products, we refuse to settle a trade debate that no authority has settled. What does exist, however, is a regulatory framework that few people know about: in the United States, the environmental agency requires an antimicrobial product not registered for HVAC systems to bear the statement “do not use in or on air ducts, duct fittings, duct linings, fans, supply ducts, return ducts”, precisely because of occupant exposure. And the North American association for HVAC system cleaning sets out the basic rule: source removal remains the best method; an antimicrobial may be applied only after mechanical cleaning, and no one can promise complete disinfection.

What we did not find, and therefore will not claim: no organization publishes a ban specifically targeting bleach on an evaporator coil. The prohibition we apply comes from manufacturers and common sense regarding aluminum, not from a standard.

The pan and the drain

The condensate pan of a wall-mounted unit is shallow: there is almost no margin for error, whether from debris or from a unit that is no longer level. We have published the drainage system itself and the condensate pump elsewhere in this series, and will not revisit them here.

For unclogging, documented practice favors vacuuming at the outdoor termination, followed by rinsing with water from the inside—rather than blowing from the unit. Training sources that describe blowing with air or nitrogen all emphasize the same warning: do not apply excessive pressure, or you may separate a joint and create a leak. There is also a line of reasoning—ours, which we present as such: blowing from the inside pushes the blockage and debris toward a shallow pan inside a finished wall. The logical order is therefore to pull, then rinse.

How often, and why the question has no normative answer

Let us put it simply: no standard prescribes how often the indoor coil and wheel of a wall-mounted unit must be professionally cleaned.

What exists:

• the North American standard for restoring the cleanliness of HVAC systems is conditional, not calendar-based: it explains how to determine whether a surface should be cleaned, repaired, or replaced, not how often;
• the main industry association’s standard covers assessment, cleaning, and restoration, and its list of components does include the coils, the drain pan, and the entire fan assembly;
• the most frequently cited inspection and maintenance standard targets commercial buildings and does not govern a residential wall-mounted unit;
• the only intervals published by manufacturers concern filters: GREE indicates cleaning every one to three months, more often in dusty environments, with lukewarm water;
• the only interval we found for a fan wheel is an empirical rule stated by a manufacturer’s spokesperson in the trade press—approximately once a year. We report it for what it is.

The appropriate frequency therefore depends on the environment and usage, as we published for Montréal-Est and Pierrefonds-Roxboro, not on a standard that does not exist. As for annual rinsing of the outdoor coil as a performance condition, it belongs to Saint-Théodore-d'Acton, and we will not rewrite it.

What must be cleared before our visit

We have published the clearance required in front of a head and its recording in the file (Saint-David, Saint-Ours), the two-metre clearance that is also the technician’s working space (LaSalle), the clearance that is lost through abandonment (Sainte-Hélène-de-Bagot), and objects that rotate within a clearance zone (Noyan). Cleaning adds one more requirement, and it is specific:

• the floor beneath the unit and for approximately one metre in front of it must be accessible and suitable for water;
• the furniture, frames, rugs, and curtains in this area are moved beforehand, not during;
• an electrical outlet located below the appliance is identified in advance;
• access to water and a drainage point are identified;
• on a multi-head system, planning is done room by room, not by appliance: the logistics change completely depending on whether cleaning is done in a living room or a child’s bedroom.

What the research actually documents

A measured approach is needed here, because the subject attracts commercial exaggeration.

A study published in 2024 in a public health journal measured the bacterial load in different parts of household air conditioners: approximately 12,296 CFU/cm² in the tray, 9,128 on the filter, 6,595 on the heat-exchanger fins, and 5,042 at the outlet—all above the threshold of 500 CFU/cm² established in the hygiene standard of the country where the study was conducted. The authors noted these communities’ strong capacity to form biofilms and referred to a potential risk.

This is the level of certainty available, and we are sticking to it: it is a documented sanitation issue, not proof that your appliance is making you sick. Nor is there an equivalent Canadian threshold. That is a good reason to clean; it is not a reason to be afraid.

A 2024 by-law that provides for a domestic wind turbine, but not a heat pump

The second part of this page is regulatory, and Saint-Sébastien offered us a finding we had not yet encountered in any municipality.

What the municipality names, and what it does not name

The zoning by-law No. 522 sets out in section 9.1 the exhaustive list of accessory uses and structures authorized for a dwelling. We read it: parking, an antenna, a garage, a carport, a winter car shelter, a shed and workshop, a domestic greenhouse, a kiosk and gazebo, an outdoor furnace, an outdoor fireplace, a domestic wind turbine, a swimming pool and hot tub, an intergenerational dwelling unit, and a commercial-type accessory use.

Fourteen items. The heat pump is not among them.

By-law No. 525 on permits and certificates, adopted in February 2024, lists in section 6.1 eighteen categories of work requiring an authorization certificate. These include excavation and filling, tree cutting, demolition, changes to exterior cladding materials, repair or renovation of a structure, swimming pools, the installation of an outdoor furnace, and work on the shoreline, floodplain, or littoral zone.

The heat pump is not listed there either, and the term does not appear in Building Bylaw No. 524.

It is important to understand what this means. A bylaw adopted in 2024 specifically regulates a residential wind turbine, the outdoor furnace, and the telecommunications antenna—yet says nothing about the unit that thousands of Quebec households install every year.

What we are not concluding from this

We are not concluding that no permit is required. That is the mistake we have already identified in Mont-Saint-Grégoire, where the unit was absent from the permit bylaw while being mentioned elsewhere: the hurried contractor draws the obvious—and false—conclusion from that.

In practice, several of the eighteen categories could apply to the installation: excavation or fill if a base is prepared, the repair or renovation of a structure, or a change in exterior cladding materials if the wall is pierced and then closed up. This is our reasoning, not the wording of the bylaw, and we present it as such. The only person authorized to decide the matter is the municipal inspector.

The figures that exist—and the question they raise

Section 9.2 sets out the conditions applicable to accessory structures: they are permitted in side and rear yards only; minimum rear and side setbacks of 1.5 m must be maintained, with the edge of the roof at least 45 cm from the property line; the height of exterior walls must not exceed 3.5 m; the minimum distance between two buildings is 3 m; a maximum of three detached accessory buildings is permitted per lot; the architectural treatment must harmonize with the main building; and the total ground-floor area of all accessory buildings may not exceed 15% of the lot.

These values are real, and we read them. What we do not know is whether a heat pump is an “accessory structure” within the meaning of this bylaw—the answer is found in the definitions section, which we were unable to read. This is exactly the question to ask, and it is not theoretical: depending on the answer, the unit may or may not be allowed in a front yard.

Finally, note Article 5.8, which allows structures housing a building’s “mechanical equipment” to exceed the maximum height by up to three metres. This is a rooftop mechanical enclosure provision, not a residential heat-pump rule: we mention it so that it is not misread.

Noise: two by-laws we were unable to read

By-law no. 459 on nuisances prohibits, in Article 2.5, noise likely to disturb the peace, quiet, comfort, or rest. Its examples concern the nighttime use of motorized equipment, and one of them explicitly mentions a compressor. No decibel value appears in it, and neither the word heat pump nor the word air conditioner appears.

Two other by-laws exist—the 480 (RM-420) concerning noise and the 483 (RM-460) concerning public peace and nuisances. We were unable to read them: they are scanned image documents with no text layer. We state this rather than draw a conclusion. This is precisely where a threshold or hours of application might be found, and it is therefore the first thing to verify with the municipality.

A Victor Bourgeau church that the state never protected

The Saint-Sébastien church, on rue Principale, was built from 1869 to 1872 by Victor Bourgeau (1809–1888) and Étienne-Alcibiade Leprohon (1842–1902)—the same architects who, the following year, designed the church of Sainte-Angèle-de-Monnoir, which we discussed recently. Bourgeau designed the Marie-Reine-du-Monde Cathedral in Montréal.

And yet, in the Répertoire du patrimoine culturel du Québec, its status is “inventoried”—as part of the inventory of places of worship. Neither classified nor designated.

We published in Saint-Mathias-sur-Richelieu the distinction between the three legal designations that everyone confuses, and the fact that only the protection area affects an undesignated neighbouring property. We will not rewrite it. What Saint-Sébastien adds is the other end of the reasoning:

When a building is merely inventoried, there is no legal protection to circumvent—and what actually governs is the municipal zoning. Here, By-law 522 contains a Section 23, “Specific provisions concerning the heritage zone,” whose Article 23.1 specifies that it applies to the heritage zone identified in the zoning plan, while Article 23.2 sets out specific standards for protecting the built heritage. We were unable to read the text of 23.2, so we will not publish anything about it.

The useful question is therefore not “is the church protected?” It is: “is my lot in the heritage zone shown on the zoning plan, and if so, does section 23.2 say anything about visible mechanical equipment?”

A warning, because the trap is real: the Directory contains a file titled “Presbytère de Saint-Sébastien” that is located in Boucherville and has nothing to do with this municipality.

The floodplain

The zoning by-law contains a Section 20, “Protection of shorelines, littoral zones, and floodplains” (sections 20.1 to 20.9), the construction by-law contains a chapter on floodplain protection measures, and By-law 525 requires an authorization certificate for work on the shoreline, floodplain, or littoral zone, with the application required to establish the boundaries according to the 20- and 100-year recurrence elevations. The urban plan locates the areas concerned to the south and southwest, and notes that the overflow plain of the Rivière du Sud is controlled by a dyke system managed by the MRC — which is not an ordinary configuration.

We were unable to read the text of sections 20.1 to 20.9. As for the technical decisions regarding installation in a flood-prone area — the base elevation established using a known elevation, the disconnect switch and wiring above that line, and what must never be done with a submerged appliance — they are published in detail on our Ormstown, Sainte-Marthe-sur-le-Lac, and Sainte-Anne-de-Sorel pages, and we refer you to them.

Questions to ask before ordering

Here we apply the method published for Saint-Mathias-sur-Richelieu and Mont-Saint-Grégoire, and we name it rather than presenting it as new:

1. Is a heat pump an “accessory construction” within the meaning of by-law 522, and does section 9.2 apply to it?
2. Under which category in section 6.1 is a certificate required for this installation, if one is required?
3. Is my lot in the heritage zone, and does section 23.2 regulate mechanical equipment?
4. Is my lot covered by Section 20 — shoreline, littoral, or floodplain?

And the resulting commercial rule, invariable: the installation date is set after issuance, never before.

The selected unit: GREE FreeMatch R32, GWHD(42)ND6MO outdoor unit

Technical specifications for the installed unit

Two wall-mounted units: 18,000 BTU/h for the open-concept ground floor, 12,000 BTU/h for the primary bedroom. Total installed capacity: 30,000 BTU/h, or 71% of the rated cooling capacity and 68% in heating.

Why the largest compressor for the smallest heads

An intentional oversizing of this magnitude calls for an explanation, and here it is entirely related to the site rather than comfort.

The two rooms served require 30,000 BTU/h, and a smaller compressor would suffice. Distance made the decision. The GWHD(42) is the only model in the range precharged for 50 metres and the only one with a maximum total length of 100 metres — on a farm where the outdoor unit is far from the heads, that margin is no longer a luxury. The argument for using line length as a selection criterion was published at Charlemagne and later revisited at Sorel-Tracy; we apply it, we do not rewrite it.

Two secondary effects are worth noting, without disguising them as sales arguments: the compressor will never operate near its ceiling, and the unit accepts five indoor units, leaving three ports free. These ports were left deliberately, not by chance.

The capacity of the second head was determined by the modulation floor — 8,870 BTU/h on this model. A 12,000-BTU head operating alone at night would be about 35% above that; a smaller head would come too close to it. We published this arithmetic in detail at Noyan and refer you there.

The capacity of the largest head is also a maintenance decision

Here is the selection argument specific to this page, and it follows directly from the first half of the article.

An 18,000 BTU/h head is among the largest in the residential range. A wide coil, a long tangential fan. Everything described above — clearing the electrical box, lifting the heat exchanger, removing the fan wheel, and positioning a wash bag beneath a unit of this width — becomes an operation on an entirely different scale than with a 9,000 BTU/h head.

We kept it anyway because the open area called for it. But we did two things as a result, and that is the real point:

• the installation height and the clearance reserved in front of the unit were determined with cleaning in mind, not merely air distribution and intake clearance;
• the consequence is recorded in the commissioning file: that particular head requires wider access and, depending on the configuration, a second person.

We therefore state the rule as follows: choose a larger capacity for the room, and pay for that choice during maintenance. The estimate must state which of the two was optimized.

54 m of developed length, and 80 g of R32 added

The runs measure 21 m and 33 m, for a total of 54 m of developed length. The GWHD(42) is precharged for 50 m; therefore, 4 m × 20 g/m = 80 g had to be added, or approximately 3% of the factory charge, bringing the system to 2,780 g. On any other model in the range, the same run would have required several times more additional refrigerant — the practical meaning of the precharge margin.

The added quantity is weighed and recorded in the file, and the minimum room-size verification required by the A2L refrigerant was redone using the final charge, not the catalog charge. This point matters more here than elsewhere: the 18,000 BTU/h head serves the largest room, but the bedroom is what determines the result, and that is the room we measure.

Saint-Sébastien: What You Need to Know

The village was once called “Le Coin” because it occupies the intersection of Routes 133 and 227. The intriguing detail is that the current urban plan still designates this same crossroads — Route 133 and Rang des Dussault — as one of its two heritage areas. A nickname, an intersection, and a zoning area that are all the same thing.

The municipality is named after Saint Sebastian, a Roman martyr executed in 288. The parish was established in 1864 and the municipality in 1865, following its separation from Saint-Georges-de-Henryville; it relinquished its status as a parish municipality on November 5, 2011. Settlement combined pioneers from New England, Montmagny and Île d'Orléans beginning in the 1760s, followed by a significant Acadian influx after 1837—which explains the 19th-century houses with English architectural influences that the urban plan still identifies, along with three roadside crosses and two cemeteries.

Three reference points, published with their source:

• 706 residents, according to population decree 1499-2025, published in the Gazette officielle du Québec in December 2025 and based on estimates from the Institut de la statistique du Québec as of July 1, 2025;
• 63.64 km², of which more than 99% is in the permanent agricultural zone—for a municipality of this size, that is close to the maximum possible; grain crops and dairy cattle account for most of the activity;
• neighboring municipalities: Saint-Alexandre, Sainte-Anne-de-Sabrevois, Henryville, Venise-en-Québec, Notre-Dame-de-Stanbridge and Pike River—the last two belonging to another MRC, which places the territory on an administrative boundary.

A useful clarification, because the mistake is easy to make and costly: there are two municipalities named Saint-Sébastien in Quebec. The other is in the MRC du Granit, in Estrie. According to the same population decree, one has 706 residents and the other 707—a difference of one person between two municipalities with the same name. Check the geographic code before sending anything.

The mistakes we correct most often

• Believing that a rinsed filter is equivalent to a clean unit. The filter is upstream; the wheel is downstream, and cold.
• Turning the unit off with the remote before putting your hands inside it. On an A2L head, the mitigation logic can start the fan on its own.
• Spraying a household product into the fins. Aluminum, residue, and a leak alarm triggered by the aerosol.
• Blowing out the drain from inside toward a shallow pan, in a finished wall.
• Confusing removal with take-away. One is cleaning; the other is refrigeration work.
• Concluding that a silent regulation amounts to authorization.
• Choosing the largest head without writing down what it will cost to maintain.

Grants, warranty and documentation

The appliance is ENERGY STAR certified. Three administrative rules matter more than any amount: the declared AHRI reference must match the combination actually installed—the same outdoor model can have three references depending on the type of indoor units; the model must appear on the list applicable to the program in question, as these lists are revised; and the installation must be carried out by a company holding the appropriate licences from the Régie du bâtiment du Québec, given the work to be performed, with an invoice containing the required information. We have detailed these eligibility mechanisms on our Noyan page.

Our other projects in the area

We already have a page for GREE FLEXX R32 in Saint-Sébastien itself—a three-ton central heat pump suspended in a ceiling soffit in an attached garage. And in the same Haut-Richelieu RCM, FreeMatch R32 projects in Mont-Saint-Grégoire, Noyan, Saint-Paul-de-l'Île-aux-Noix, and Saint-Bernard-de-Lacolle.

The distinction between the two Saint-Sébastien pages can be summed up in one sentence: one concerns an appliance that is hidden, while the other concerns an appliance you look at. The garage unit is invisible, quiet, and out of reach—you only encounter it when it stops working. The wall-mounted head is in the room, at eye level, and you live with it. It is not the same machine installed in two places: they are two different relationships with maintenance, which is why this page discusses washing while the other discusses service access.

Our teams serve the entire South Shore, Montréal, Laval, Longueuil, the North Shore, and Montérégie, including Henryville, Saint-Alexandre, Sainte-Anne-de-Sabrevois, and Saint-Jean-sur-Richelieu.

What we take away from this project

An HVAC installation is judged on the day it is installed; a system is judged in its fifth year. Between the two, there is a fan wheel no one sees, a shallow drain pan inside a finished wall, a sensor that can start a fan on its own, and a municipal bylaw that has never used the word “heat pump.”

For a wall-mounted heat pump, wall-mounted air conditioner, or HVAC maintenance project in Saint-Sébastien, the Haut-Richelieu RCM, or elsewhere in Montérégie, our teams travel to the site, take measurements, ask the planning department questions before ordering, and provide a file explaining what was done and what still needs monitoring.