HVAC Psychrometrics Calculator

API ↗

HVAC Psychrometrics Calculator is a paid API for AI agents from x402-agent-api.onrender.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-10).

Calculates the full psychrometric state of moist air (dry-bulb, wet-bulb, dew point, enthalpy, humidity ratio, density, etc.) from any two known properties, with every ASHRAE-referenced calculation step shown

How this service works

SEC filings and web data for AI agents: read any section of a US public company's 10-K or 10-Q (risk factors, MD&A, …) since 2001, see what changed in it since last year, its latest 8-K events and press releases, and a free index of its filings; turn any web page into clean Markdown; profile a domain's email setup; HVAC engineering calculations (psychrometrics, coil loads, duct sizing) with every step shown. No accounts or API keys: pay per call in USDC with x402. Discovery endpoints are free; paid endpoints use the x402 v2 protocol with USDC on Base. Call a paid endpoint, receive 402 with a PAYMENT-REQUIRED header, sign the payment, and retry with PAYMENT-SIGNATURE. Libraries such as @x402/fetch do this transparently. Which tool: What filings does a company have? Which year's report or which 8-K do I want? → sec_list_filings (free). What are a company's risk factors? What did management say in the MD&A? What was in an earlier year's report? → sec_filing_section ($0.01). What changed in a company's risk factors (or MD&A, business, legal proceedings) since last year? Which new risks were added? → sec_section_changes ($0.04). I need several sections of the same report (e.g. risk factors and MD&A). → sec_filing_sections ($0.015). What are a company's revenue, profit, EPS, cash, debt and free cash flow over the last years or quarters? → sec_financials ($0.005). Are a company's insiders (CEO, CFO, directors) buying or selling its stock? → sec_insider_trades ($0.005). What happened at a company lately: earnings, CEO/CFO changes, acquisitions, cybersecurity incidents? → sec_recent_events ($0.01). Which companies' SEC filings mention a phrase ("material weakness", "tariff", a product or a person)? → sec_full_text_search ($0.01). Who is this company (from a domain, name or ticker): what it does, HQ, founders, CEO, employees, ticker? → company_profile ($0.01). Is this person, company or crypto wallet on a US sanctions (OFAC) list? → sanctions_screen ($0.005). Where are US interest rates, inflation and unemployment right now? → economic_indicators ($0.003). What does this web page, article, PDF, feed or documentation say? → scrape_markdown ($0.002). Read several pages at once, or find a site's pages (pricing, docs, blog) first? → site_map ($0.002). Is this email address real and safe to send to? → email_verify ($0.002). Who hosts a company's email, is SPF/DMARC set up, which SaaS does it use? → domain_enrich ($0.004). HVAC: what are the dew point, enthalpy, RH and humidity ratio of air (from any two properties, at any elevation)? → hvac_psychrometrics ($0.002). HVAC: what is the cooling or heating coil load (sensible, latent, tons), or the mixed air with outdoor air? → hvac_coil_load ($0.002). HVAC: what size duct for this airflow (equal friction or velocity), or what friction and velocity in this duct? → hvac_duct_size ($0.002). Inputs are forgiving: name a company by ticker, CIK or name; sections as "Risk Factors", "MD&A" or "Item 1A"; 8-K events as codes (5.02) or words (earnings, executive changes); unknown fields are ignored. Invalid input returns a valid example, and failed calls are never charged. Every paid result ends with `next_calls`: the natural follow-up questions as ready-to-send calls with their price. Live reliability (answers, failures and latency per tool) is published at /status.

Output

Returns the complete psychrometric state of moist air including dry-bulb, wet-bulb, dew-point, relative humidity, enthalpy, humidity ratio, grains per pound, specific volume, vapor pressure, and density — along with atmospheric pressure for the given elevation, step-by-step ASHRAE-referenced calculations, unit labels, and suggested next API calls (e.g. coil load calculation).