This page is a worksheet, not an argument. Write an answer beside each of the seven lines below, in pencil, standing in your own mechanical room. Whatever is still empty when you finish is the real output: those blanks are exactly what a survey exists to fill, and they tell us whether a heat-recovery or energy-recovery core can be named from your kitchen table or genuinely cannot be.
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Furnace Direct schedules licensed recovery-ventilator installs across Minnetrista and the western Lake Minnetonka townships. There is no hardware to browse on this page — the sheet exists so a price can be built from what your house actually does.
Most selection guides are built to produce a verdict from whatever you happen to know, which quietly rewards confident guessing. This one is built the other way round. A sheet with four answers and three blanks is a more useful document than a sheet where every line got a shrug and a maybe, because the pattern of what is missing tells us which visit to schedule. Blanks on lines five and seven mean a survey with a tape measure and a meter. A blank on line four means somebody needs to open the furnace closet and read a label before anything else is discussed. A blank on line two is the only one we will not work around, because household size is the moisture source and there is no instrument that can infer it.
Line one reports film at every north corner. Line two says five people. Line three says the attic was blown two winters ago and the complaint started the following January. Line six says the humidifier holds its setting without trying. That combination is a heat-recovery conversation and we would say so before measuring anything, because every filled line points the same way and nothing in lines five or seven could reverse it.
Line one reports clear glass in a deep freeze. Line two says two people, often away. Line three says new glass and rim-joist foam last autumn. Line six says the humidifier runs constantly and never reaches its number. That is an energy-recovery conversation, and the readings on line seven would be confirmation rather than discovery.
Out here the house is frequently the smallest thing on the parcel. Walkouts step down toward the water, mechanical rooms end up at the lowest and most interior corner of the building, and the only exterior wall with room for two hoods and a safe separation between them can be forty feet and a floor away. On the Halsted Bay and Stubbs Bay fringe we also care which face the intake lands on, because the exposed elevation takes wind-driven weather that a sheltered wall never sees. None of that appears anywhere in lines one through four. All of it appears in the price, which is why we would rather you count the feet yourself than have us discover them from a ladder.
Line five needs twenty minutes outside with a tape. Line six needs you to actually read the humidistat rather than remember what it was set to in 2019 — the gap between the setting and the achieved reading is the point. Line seven needs a cheap hygrometer parked at the coldest interior wall and three dawn readings written down. Do line six first. It is the fastest of the three and it resolves more sheets than the other two combined, because a humidifier that cannot win is the clearest statement a dry house ever makes about itself.
Four lines filled is enough to start. Send the sheet with the gaps showing.
Send my seven linesSend it anyway, and say which lines you could not answer. A sheet with two entries still rules things in and out: it tells us whether we are walking into a first install or a service call, whether the building has been tightened recently, and roughly how much of the day will be spent on routing. We would rather read an honest two-line sheet and book a survey than receive a complete one where half the entries were reconstructed from memory. The worst outcome on this page is a confident wrong answer on line one, because that is the line everything else gets weighed against.
Put the line numbers in the message field with whatever you wrote beside them, and say plainly which ones are outstanding. If there is a cabinet or a damper already on the return, a photograph of its data plate answers line four better than any sentence. What comes back is a core lean where the sheet supports one, a named list of what the survey will measure where it does not, and a single installed figure — never a link to buy equipment.
Because a blank is specific. If lines one through four are filled and only the readings are missing, we can usually name a core and tell you what would change our mind. If line two or line four is blank, no honest recommendation exists yet, and knowing that saves you from buying a cabinet on a coin flip.
It changes line five dramatically and nothing else. Long interior runs to the only sensible exterior wall are a real cost and a real day, and they are the main reason two houses with identical sheets get different numbers. The technology in the cabinet still follows lines one, two, and six.
Only as a routing note. Neither appears in the ventilation calculation, but they both occupy ground and sometimes wall space, so a sentence about where the pressure tank and the mechanical room sit relative to the outside wall keeps line five honest. Nothing about rural infrastructure picks a core.
Yes, and most people do. Send six lines and name the seventh as outstanding. If the first six point the same direction, the readings end up confirming what you already wrote. They matter most when lines one and six disagree with each other, which happens more often in large houses with one occupied floor.
Fill in one sheet and answer each line from the tightest part of the building, then add a sentence about the older half. Mixed-tightness addresses are common out here, and the tight volume is where the complaint will show up first, so that is the volume the sheet should describe.
No. We install and replace recovery ventilators under a licensed Minnesota mechanical crew, and there is no counter here to buy a box from. What comes back from a finished sheet is a core lean, the routing we expect, and one installed price.
Type the line numbers you answered and say which are still open. A core lean and one installed price come back.
Neighbouring pages throw the sheet away and get to the same call through household witnesses, mechanical-room artefacts, and spec-sheet translation.