Built by a Red Seal Refrigeration Mechanic • Tools that keep up with the trade.
Last Updated: September 7, 2026
Welcome to Peter's HVAC Advisory — a resource built by a senior refrigeration technician for fellow techs in the field.
By creating an account and using this site, you agree to these Terms of Service and Privacy Policy.
The first 50 registered members receive free access during beta to member tools and HVAC Lens. After 50 signups, new access is closed until beta is finished. There is no paid signup while beta is closed.
Existing paid subscriptions (if any) remain valid until cancelled. Manage those in the Stripe Customer Portal.
Member tools are for qualified HVAC and refrigeration professionals. Do not share your login credentials.
The refrigeration calculators, psychrometric tools, and technical data on this site are provided for reference only.
The Electrical calculators — including Ohm’s Law, power conversion, voltage-drop estimates, MCA/MOP suggestions, and any displayed wire size — are field-reference and educational aids only. They are not professional engineering advice, not a design service, and not a substitute for the current Canadian Electrical Code (CEC / CSA C22.1), the National Electrical Code (NEC), IEC or other local regulations, manufacturer instructions, sealed drawings, or a permit.
Final conductor selection, overcurrent-device selection, and installation design must be performed by a person licensed to do that work — a licensed electrician and/or a professional engineer — as required by the applicable statute, regulation, and authority having jurisdiction (AHJ).
These tools use simplified tables and assumptions. They do not implement the full CEC (or equivalent), including without limitation: conductor ampacity correction and derating (ambient temperature, more than three current-carrying conductors, bundling, raceway fill), termination-temperature limitations, equipment grounding and bonding, voltage-drop requirements beyond a simplified 3% check, motor-branch exceptions, continuous-load rules beyond a single 80% / 125% factor, underground or thermal-resistivity conditions, or AHJ amendments.
You must not use these results as a basis to operate outside the scope of your licence, ticket, or certificate, or to perform work that requires an electrician’s licence, an engineering seal, or a permit. HVAC and refrigeration technicians remain responsible for staying within their authorized scope and for having licensed electrical work completed by qualified persons.
Results must be independently verified against the current Code, the equipment nameplate, and the AHJ before any material is ordered or installed. The site and its operators make no warranty of accuracy, completeness, or fitness for a particular installation, and accept no liability for personal injury, property damage, failed inspections, or Code violations arising from reliance on these tools.
You agree not to:
Note: The HTML and JavaScript code for this site is open source. You are free to use, modify, and distribute it.
Site code built with Grok AI by xAI.
Site content © 2026 Peter's HVAC Advisory – All Rights Reserved.
The HTML, CSS, and JavaScript code for this website is released as open source. You are welcome to use modify, copy, and distribute the code freely.
However, the original written content, tool explanations, articles, logos, and branding of Peter's HVAC Advisory are protected by copyright. You may not republish or sell them as your own work without permission. Printed materials (if any are created later) will also be protected.
The HTML, CSS, and JavaScript code for this website is released as open source. You are free to use, modify, and distribute it. However, the content, tools, calculations, logos, and branding of Peter's HVAC Advisory are protected by copyright and may not be republished or sold without written permission.
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We do not sell your personal information. Your data is stored securely using Supabase.
The site is provided "as is". We are not responsible for any incorrect calculations, equipment damage, or safety incidents.
These terms are governed by the laws of the Province of Ontario, Canada.
We may update these terms occasionally. Continued use of the site after changes means you accept the new terms.