Grant Cleaning Door & Gasket Wps145 Secondary Spira 9-36Kw

13" x 8.5" Cleaning door & gasket Spira models WPS145A Secondary cleaning door & gasket

Genuine Secondary Cleaning Door & Gasket for Grant Spira 9–36kW Biomass Boilers

The Grant WPS145 Cleaning Door & Gasket Kit is a genuine replacement secondary cleaning access door and sealing gasket, specifically designed for use with Grant Spira biomass boilers ranging from 9kW to 36kW output. This door provides essential access to the internal heat exchanger for routine cleaning and maintenance, while the high-temperature gasket ensures a secure and airtight seal.

Over time, the cleaning door or gasket may become worn, warped, or degraded due to repeated exposure to combustion by-products and high temperatures. Replacing the complete WPS145 kit helps maintain system efficiency, safe operation, and compliance with biomass maintenance standards.

Key Features & Benefits

• Official Grant OEM Part – WPS145
  Fully approved for use in Grant Spira boilers – ensures a perfect fit and long service life.

• Includes Door & Gasket
  Complete assembly ready to install – no need to source gasket and cover separately.

• Restores Safe, Airtight Seal
  Prevents flue gas leakage and maintains correct boiler pressure and combustion efficiency.

• Provides Easy Access for Maintenance
  Allows internal cleaning of the heat exchanger to be carried out quickly and safely.

• High-Temperature Resistant Materials
  Designed to withstand the demanding environment of biomass combustion chambers.

• Pre-Drilled and Sized for OEM Fitment
  Aligns precisely with existing fixing points – no adjustment or modification required.

 Compatible Grant Boiler Models

The WPS145 Cleaning Door & Gasket Kit is compatible with:

• Grant Spira 9kW Biomass Boiler

• Grant Spira 15kW Biomass Boiler

• Grant Spira 18kW Biomass Boiler

• Grant Spira 22kW Biomass Boiler

• Grant Spira 26kW Biomass Boiler

• Grant Spira 36kW Biomass Boiler

Not sure if this part fits your boiler? Contact us with your model or serial number—we’ll confirm compatibility quickly. 

 When to Replace the Cleaning Door & Gasket

Replace the WPS145 kit if:

• The cleaning door is warped, rusted, or damaged

• The gasket is cracked, perished, or leaking flue gases

• You're carrying out a deep clean or heat exchanger inspection

• The door no longer seals tightly, even when correctly closed

A compromised seal can lead to reduced efficiency, flue gas escape, and potential safety risks—regular inspection and timely replacement is recommended.

 Technical Specifications

• Part Number: WPS145

• Manufacturer: Grant UK

• Component Type: Secondary cleaning access door and gasket

• Material: Heat-resistant steel door with fire-grade gasket

• Application: Biomass boiler combustion and maintenance area

• Mounting: OEM-aligned fixing points for tool-free fitment

• Operating Temperature: Rated for high-temp environments typical of biomass combustion