Homeowner needs to rebuild a water heater closet to meet city code for combustion air and ensure future water heater replacements fit without demolition.

No clear guidance or product exists for retrofitting a small closet to satisfy combustion air codes while allowing future access.

Opp. Score

Severity

3Medium

Willingness to Pay

implied

Added

May 17, 2026

Workarounds Described

Plumber removed door casing/jamb to fit tank
Plumber removed low combustion air duct to make space
Homeowner considers cutting a hole through brick wall for new duct

Implied Software Gaps

App that helps plan closet rebuild to meet combustion air codes

App Concept

ClosetCode Pro

A compliance and design app that helps homeowners and contractors plan water heater closet rebuilds. It generates code-compliant layouts for combustion air ducts or louvered doors, compares duct locations (attic, wall, door), and provides step-by-step framing instructions to maximize future access. Prevents failed inspections and costly rework.

Key Features

Input closet dimensions, water heater specs, and local code (e.g., Austin TX)
Auto-generates compliant duct or louver options with diagrams
Includes cost/timeline estimates for each ventilation solution
Outputs a printable build plan for contractor or DIY use

Target Users: Homeowners and handymen replacing water heaters in tight closets, especially in old homes with non-standard framing

Revenue Model: Freemium with $9.99 per plan PDF; $29.99/year unlimited plans

Part of App Idea

Homeowner needs to rebuild a water heater closet to meet city code for combustion air and ensure future water heater replacements fit without demolition.

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