Essential Components for Vehicle Heating and Air Conditioning

This collection provides everything you need to build or repair your vehicle's heating and A/C systems. From rotary fan switches to flexible ducting, aluminium unions, bulkhead flanges, and vent trims, these parts are perfect for classic builds or custom installations.

Jump To
A/C Parts
Heating Parts
Joiners, Reducers & Tee's
Vents
Sidebar

Filter Type

Filter Sub Type

Brand

Material

Size

Internal Diameter

Price

£
to
£

Latest Products

Smiths Pressure Transducer - Pressure Sender

Smiths Pressure Transducer - Pressure Sender

Genuine Smiths Smiths Oil pressure sender to suit Smiths Classic electrical gauges. Has 1/8NPT thread. This Smiths Classic Pressure sender measures 52mm diameter by 40mm in height (not including the thread or electrical connector).
£82.00
£0.00
£82.00
(-0%)

Engine Oil

CASTROL EDGE 5W-40 Fully Synthetic Engine OilCASTROL EDGE 5W-40 Fully Synthetic Engine Oil
Quick Add
Close

CASTROL EDGE 5W-40 Fully Synthetic Engine Oil

Advanced full synthetic engine oil for maximum performance and protection. Improves fuel economy and exceeds industry standards.
£13.96
£0.00
£13.96
(-0%)
Quick Add
Close
Filter
264 results
  • 10
  • 15
  • 20
  • 25
  • 30
  • 50
  • Featured
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
Sort

Sort by:

  • Featured
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
  • Plastic Knob and Bezel 3 Speed Rotary Heater Fan Switch - Car Builder SolutionsPlastic Knob and Bezel 3 Speed Rotary Heater Fan Switch - Car Builder Solutions

    Plastic Knob and Bezel 3 Speed Rotary Heater Fan Switch

    55mm dia bezel, fits through a 11mm hole.
    £13.80
    £0.00
    £13.80
    (-0%)
  • Drier Bracket - Car Builder SolutionsDrier Bracket - Car Builder Solutions

    Drier Bracket

    Securely mount your air-con drier with this durable, plated steel bracket. Fits cylinders from 58mm to 65mm.
    £5.40
    £0.00
    £5.40
    (-0%)
  • 55 mm (2 1/8") Duct Hose PVC Per Metre - Car Builder Solutions55 mm (2 1/8") Duct Hose PVC Per Metre - Car Builder Solutions
    Quick Add
    Close

    55 mm (2 1/8") Duct Hose PVC Per Metre

    NOTE: MAY BE EITHER GREY OR BLACK DEPENDING ON CURRENT STOCK SOLD BY THE FULLY STRETCHED METRE
    £8.40
    £0.00
    £8.40
    (-0%)
    Quick Add
    Close
  • 15mm (5/8") Heater Valve - Car Builder Solutions15mm (5/8") Heater Valve - Car Builder Solutions

    15mm (5/8") Heater Valve

    15mm on/off heater valve with 1/4 turn rotary knob. Versatile mounting, removable knob, and clear flow direction arrow.
    £18.00
    £0.00
    £18.00
    (-0%)
  • Trinary Switch for Air Con - Car Builder Solutions

    Trinary Switch for Air Con

    A Three-function pressure switch for our Air-Conditioning kit #AIRCON.
    £24.00
    £0.00
    £24.00
    (-0%)
  • Slimline Inline Rotary Heater Valve Controller - Car Builder SolutionsSlimline Inline Rotary Heater Valve Controller - Car Builder Solutions

    Slimline Inline Rotary Heater Valve Controller

    54mm bezel dia. Fits through a 11mm hole>. Maximum inner cable travel 34mm.
    £30.00
    £0.00
    £30.00
    (-0%)
  • 10mm (3/8") Heater Hose Per Metre - Car Builder Solutions
    Quick Add
    Close

    10mm (3/8") Heater Hose Per Metre

    SOLD BY THE METRE. 10mm ID. 17.5mm OD.
    £6.00
    £0.00
    £6.00
    (-0%)
    Quick Add
    Close
  • A/C Union #6 90 Degree - Car Builder Solutions

    A/C Union #6 90 Degree

    A robust 90-degree A/C union for connecting refrigeration lines, ensuring a secure, leak-free connection.
    £7.20
    £0.00
    £7.20
    (-0%)
  • Drier for Air Con 200mm - Car Builder SolutionsDrier for Air Con 200mm - Car Builder Solutions

    Drier for Air Con 200mm

    200mm air con drier with Dash 6 O-ring fittings & two 3/8 UNF female threads for switches. Efficient & reliable.
    £24.00
    £0.00
    £24.00
    (-0%)
  • Cable Operated 15mm (5/8") Brass Heater Valve - Car Builder SolutionsCable Operated 15mm (5/8") Brass Heater Valve - Car Builder Solutions

    Cable Operated 15mm (5/8") Brass Heater Valve

    15mm inlet and outlet.
    £38.40
    £0.00
    £38.40
    (-0%)
  • A/C Union #6 Straight - Car Builder Solutions

    A/C Union #6 Straight

    Reliable A/C union #6 straight connector for seamless, leak-proof connections in refrigeration systems.
    £7.20
    £0.00
    £7.20
    (-0%)
  • Classic Style Paper Covered Aluminium Ducting 80mm I.D. - Car Builder SolutionsClassic Style Paper Covered Aluminium Ducting 50mm I.D. - Car Builder Solutions
    Quick Add
    Close

    Classic Style Paper Covered Aluminium Ducting 50mm I.D.

    SOLD BY THE METRE
    £8.40
    £0.00
    £8.40
    (-0%)
    Quick Add
    Close
  • A/C Union #8 90 Degree - Car Builder Solutions

    A/C Union #8 90 Degree

    A/C Union 90 Degree #8 for secure, leak-free connection of refrigerant lines. Durable and easy to install for long-lasting HVAC performance.
    £8.40
    £0.00
    £8.40
    (-0%)
  • Electric Demist Heater 193mm - Car Builder SolutionsElectric Demist Heater 193mm - Car Builder Solutions
    Out Of Stock

    Electric Demist Heater 193mm

    168 watt 12v. Size 65mm x 193mm x 87mm. Comes with wiring and switch.
    £26.40
    £0.00
    £26.40
    (-0%)
    Out Of Stock
  • 63mm O.D. Bulkhead Flange Connector - Car Builder Solutions63mm O.D. Bulkhead Flange Connector - Car Builder Solutions

    63mm O.D. Bulkhead Flange Connector

    69mm square flange. 4x 6mm holes at 67mm PCD.
    £6.00
    £0.00
    £6.00
    (-0%)
  • Rubber 40mm Heater Ducting Elbow - Car Builder SolutionsRubber 40mm Heater Ducting Elbow - Car Builder Solutions

    Rubber 40mm Heater Ducting Elbow

    40mm rubber ducting elbow for tight 90° bends in ventilation systems. Fits 38mm/50mm ducting. Durable and easy to install.
    £16.80
    £0.00
    £16.80
    (-0%)
  • Solenoid Operated ON/OFF Heater Valve - Car Builder SolutionsSolenoid Operated ON/OFF Heater Valve - Car Builder Solutions

    Solenoid Operated ON/OFF Heater Valve

    15mm inlet and outlet. 12v on/off solenoid. Normally closed.
    £51.60
    £0.00
    £51.60
    (-0%)
  • 2 Hole 40mm O.D. Ducting Flange - Car Builder Solutions2 Hole 40mm O.D. Ducting Flange - Car Builder Solutions

    2 Hole 40mm O.D. Ducting Flange

    2 x 4mm mounting holes at 65mm centres
    £6.00
    £0.00
    £6.00
    (-0%)
  • 2 Hole 50mm O.D. Ducting Flange - Car Builder Solutions2 Hole 50mm O.D. Ducting Flange - Car Builder Solutions

    2 Hole 50mm O.D. Ducting Flange

    2 x 4mm mounting holes at 65mm centres
    £6.00
    £0.00
    £6.00
    (-0%)
  • Demist Plenum 250mm - Car Builder SolutionsDemist Plenum 250mm - Car Builder Solutions

    Demist Plenum 250mm

    250mm long
    £12.00
    £0.00
    £12.00
    (-0%)
  • 76mm (3") Black Silicone Duct Hose Per Metre - Car Builder Solutions63mm (2 1/2") Black Silicone Duct Hose Per Metre - Car Builder Solutions
    Quick Add
    Close

    63mm (2 1/2") Black Silicone Duct Hose Per Metre

    SOLD BY THE METRE
    £26.40
    £0.00
    £26.40
    (-0%)
    Quick Add
    Close
  • A/C Union #10 90 Degree - Car Builder Solutions

    A/C Union #10 90 Degree

    Durable 90-degree A/C union fitting for reliable, leak-free connection of #10 air conditioning lines.
    £10.80
    £0.00
    £10.80
    (-0%)
  • ALLOY Air Inlet Pair Black Bezel 100mm - Car Builder SolutionsALLOY Air Inlet Pair Black Bezel 100mm - Car Builder Solutions

    ALLOY Air Inlet Pair Black Bezel 100mm

    100mm dia with a 76mm spigot.
    £12.00
    £0.00
    £12.00
    (-0%)
  • Demist Plenum 170mm - Car Builder SolutionsDemist Plenum 170mm - Car Builder Solutions

    Demist Plenum 170mm

    Small version
    £12.00
    £0.00
    £12.00
    (-0%)
  • Heater Demist Kit 205mm - Car Builder SolutionsHeater Demist Kit 205mm - Car Builder Solutions

    Heater Demist Kit 205mm

    2x steel demist nozzels. 2x 90º rubber elbows. 1.6 meters of 40mm PVC duct hose.
    £62.40
    £0.00
    £62.40
    (-0%)

Cabin Comfort Starts with the Right Components

Whether you're adding heat to a classic car or plumbing in a full HVAC system, this collection offers modular parts to route air and control temperature. Most components are universal, compact, and built to withstand engine bay temperatures.

Featured Products in This Collection

System Categories Included

  • Heater and A/C hose joiners, reducers, and elbows
  • Air vents, diverters, and fascia trim
  • Rotary fan switches and relay blocks
  • Bulkhead fittings and O-ring-sealed connections

Useful Videos

Air Conditioning How To Install In Your Car

Designed for comfort, simplicity, and serviceability — all available for next day delivery.