BTUMatch

BTUMatch helps you compare hydronic heating equipment against project requirements using preliminary capacity screening. Enter a known heating design load or estimate a preliminary load from building-envelope inputs. Set fuel, site elevation, supply and return water temperatures, and domestic hot-water demand where applicable. Compare built-in equipment records, review published output and operating requirements, and open manufacturer specification links. Up to three eligible verified passing candidates receive a Top Suggestion badge. Equipment with unverified data or unresolved review requirements stays marked for review. Save projects on your iPhone and export a PDF equipment report using the iOS share sheet. Core calculations run on your device, without an account, subscription or in-app purchase. BTUMatch provides preliminary screening, not a certified heat-loss calculation, ACCA Manual J report, engineering design, installation instruction, code determination or guarantee of equipment suitability. A Top Suggestion or Output screen pass is not final approval. A qualified professional must verify current manufacturer ratings, performance at design conditions, minimum firing, fuel, elevation, gas and vent limits, domestic hot-water requirements and application approvals before specifying or installing equipment. The simplified flow calculation uses water properties; glycol requires mixture-specific values.