HVAC Load Calculator
Free Manual J calculator with real ZIP-code design temps
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This is 1 of 254 launches in specialized calculation tools — see how it stacks up on momentum and crowding →
204 other launches read as similar to this one →
Details
- External ID
- 1278422
- Source
- PH
- Company
- —
- Product
- HVAC Load Calculator
- Website domain
- producthunt.com
- Launched
- Oct. 13, 2026
- Cohort
- —
- Upvotes
- 10
- Upvotes percentile
- 0.95
- Tags
- Android, Productivity, Home, Climate Tech
Description
Every free HVAC load calculator I could find makes you pick one of five climate regions, which can put you 20°F off your real design condition. This one resolves your ZIP code to published 99%/1% design temperatures and tells you how closely it matched. Eight inputs, whole-house heating and cooling BTU plus tonnage. No account, no email gate. Same engine as the iOS/Android app, checked by an automated parity test. Block load only, and it says so.
Enrichment
- Niche
- specialized calculation tools
- Vertical
- Construction
- Function
- Vertical SaaS
- Audience
- B2B
- AI stance
- Not AI
- Project type
- Commercial product
- Normalized one-liner
- manual j load calculator for hvac technicians and contractors
- Manually corrected
- False
Could you build this?
Yes This is a web calculator that maps ZIP codes to open NOAA/ASHRAE climate tables and executes standard Manual J heat gain/loss mathematical formulas.
Competitors
Other products that read as similar to this one — 204 launches clear the similarity bar, closest 8 shown.
Attention rank: #1 of 205 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 329 days after the earliest competitor.
- Insulation Cost Advisor · ph · 2026-09-22 · 1 upvotes · similarity 0.51
- Room Temperature Calculator · ph · 2026-09-22 · 1 upvotes · similarity 0.49
- Domihélie · ph · 2026-09-21 · 3 upvotes · similarity 0.47
- Global AC Guide · ph · 2026-10-10 · 1 upvotes · similarity 0.47
- MortgageWise.online · ph · 2026-09-14 · 1 upvotes · similarity 0.47
- TotalMonthly · ph · 2026-10-07 · 1 upvotes · similarity 0.46
- Home Energy Calculators · ph · 2026-10-11 · 1 upvotes · similarity 0.46
- Hvac design certification · ph · 2026-09-11 · 1 upvotes · similarity 0.46
Other launches for this product
- No other launches for this product.