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Contact
One person runs BTUFit. Mail gets read, usually within a couple of days.
Email
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Worth writing about
- A number that looks wrong. Include the page URL, what you entered, and what you expected. Every table on the site is generated from the same code that runs the calculators, so one confirmed error fixes all of them at once.
- A calculator that misbehaves: name your browser and what you typed.
- Advertising and partnership questions.
What this inbox can't do
We don't sell equipment, install it, or quote jobs. For sizing beyond the rules of thumb here, a local HVAC contractor running a Manual J is the answer (when that matters).
One privacy note: nothing you type into the calculators reaches us. If you want us to see your numbers, put them in the email.