Explain bedroom CO2 readings, check certified HRV/ERV airflow, and find US installers and rebates.
Scored across 5 tools
The two ventilation-unit tools are the only real risk of confusion, but descriptions draw a clear line: check_ventilation_unit evaluates one quoted model, while units_to_ask_about returns up to three candidate families plus the airflow target. find_installers, find_rebates, and explain_co2_reading occupy clearly separate territory.
Four of five tools follow a snake_case verb_noun pattern (check_, explain_, find_, find_). units_to_ask_about breaks that pattern with a noun phrase and an awkward prepositional suffix, though it remains readable.
Five tools is well within the ideal band and each maps to a distinct step in the homeowner workflow: verify a quoted unit, sanity-check a CO2 reading, find alternatives, find installers, find rebates. Nothing appears redundant or padded.
The surface covers the full advisory loop from need assessment through unit screening to installer and rebate discovery, with CO2 interpretation as a diagnostic entry point. A minor gap is that the household's bedroom airflow target is only exposed as a side output of units_to_ask_about rather than as its own input-only step.
Checks a quoted HRV or ERV against bedroom airflow needs using exact-model HVI-certified data. Returns a screening verdict, reasons, assumptions and questions for the installer. Ambiguous model names return candidates for clarification rather than a guessed model. Does not provide a permit-ready design or guarantee installation performance.
Inputs: bedrooms (required), zip, model, state, +3 more.
Explains a bedroom CO₂ reading against the precautionary 800 ppm average-while-asleep goal: band, distance from the goal, whether the measurement is comparable, signs of a monitor reading low, and free fixes with trade-offs. The goal is not a health limit. Door-open nights appear only as one-night tests, not fixes.
Inputs: ppm (required), measured (required), room, sleepers.
Lists HRV and ERV installer companies for a US ZIP code in HouseExhale’s neutral order, with its ordering rule and coverage limits. Returns member companies where the installer program is open, otherwise researched companies from public pages covering the Colorado Front Range and New England. Installer membership and listing are free. Optional paid installer tools do not affect inclusion or ordering. No paid placements. This public tool cannot contact companies.
Inputs: zip (required), job.
What HouseExhale’s research found for a state (by ZIP code or state): utility and state programs that pay toward an HRV or ERV by name, other ventilation rebates, air sealing and insulation help, the state’s federal home energy rebates, state tax credits, and the status of the federal tax credits. Each with its link and date. Never promises eligibility.
Inputs: zip, state.
Lists up to three reviewed HRV/ERV families whose HVI-certified airflow covers what the household’s bedrooms need at night, with margin: units to ask installers about, never a single pick or a recommendation, and never paid placement. Also returns the night airflow target and how it was worked out.
Inputs: bedrooms (required), zip, state, floorAreaSqft.
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