# Mechanical (HVAC) permit MEC2026-00183 at 403 Mapleton Ave, Boulder

Boulder Planning and Development Services permit MEC2026-00183: issued Feb 4, 2026 for mechanical (hvac) work at 403 Mapleton Ave. Lennox Dual Fuel Cold Climate Heat Pump & Furnace System Overview: 2-Stage 80% Efficient Furnace Paired w/ Variable Capacity Cold Climate Heat Pump System Components: (1) Lennox Gas Furnace - EL280UH090E36B (1) Lennox Indoor Coil - CK40CT-36B-71 (1) Lennox Elite Series - EL18KSLV-036 Heat Pump 3 Ton All necessary labor & All necessary permits All necessary electrical supplies for connection of heat pumps to the existing AC main supply feed. Electrical Upgrades: Branch Circuit Connection AHRI #217449852 PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic glued vents for fuel burning appliances must undergo pressure testing. To facilitate the inspection process, please provide photographic evidence of the pressure test directly to the assigned inspector on the day the rough mechanical inspection is scheduled. Approved tests: 10 ft water test, 5 PSI positive pressure, or Negative 5 psi air pressure test for 15 Minutes. No street facing improvements have been approved.

- Permit number: MEC2026-00183
- Issued: Feb 4, 2026
- Type of work: Mechanical (HVAC) (city: Mechanical Permit, Mechanical with Electrical)
- Status: Finished (city: Letter of Completion)
- Reported cost: $21,334
- ZIP code: 80304
- All permits at this address: https://nearbypermits.com/boulder/address/403-mapleton-ave/

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-06 22:21 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 403 Mapleton Ave: https://nearbypermits.com/boulder/address/403-mapleton-ave/