Espar Airtronic S3 D2L Diesel 12V Heater Kit with EasyStart Pro Controller
Check it fits my US power plan →
Sold by Heatso US
Supplier price US$1,479.00
Heatso US's price when we last checked, on 24 October 2026. They run promotions and price by variant, so confirm the current price on their page before you buy.
Buy at Heatso US (opens Heatso US in a new tab)US supplier offer. Choose the exact model and configuration at Heatso; confirm current price, compatibility, stock and delivery.
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Warranty and support
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Overview
Espar Airtronic S3 D2L Diesel 12V Heater Kit with EasyStart Pro Controller
Espar Airtronic S3 D2L Diesel 12V Heater Kit with EasyStart Pro Controller is available from Heatso for US van and RV builds. Use the specifications and fitment details below to compare this listing with the equipment in your conversion.
Published specifications
| Supplier | Heatso US |
|---|---|
| Price currency | USD |
| Fuel | Diesel (HVO/GTL compatible) |
| Voltage | 12V |
| Output | 2,900–7,500 BTU (0.85–2.2 kW) |
| Fuel consumption | 0.02–0.07 gal/h (0.10–0.27 L/h) |
| Power draw | 6–27 W during operation |
| Dimensions (heater body) | 12.2 × 4.5 × 4.8 in (310 × 115 × 122 mm) |
| Certifications/ratings | EN 55025 class 5; IP5K4K (operating), IP5K6K/IP5K9K (not operating) |
| Warranty | 2 years (extendable by 1 year) |
| Part numbers | Install kit: 252029800000; Heater only: 252953050000; Alternative formats: 25.2953.05.0000; 25.2953.05.00.00; 25 2953 05 0000; 25 2953 05 00 00 |
Model and kit notes
- Part numbers:
- Not suitable for gasoline vehicles or electric-only platforms.
- Kit Includes
Plan heat and electrical demand separately
A fuel heater uses diesel or gasoline to produce cabin heat, while its fan, pump, controls and ignition still draw electrical power. Thermal kW or BTU/hr must not be entered as electrical input. Check the permitted fuel, altitude, fresh-air and exhaust routing, shutdown cycle and controller compatibility for this exact kit.
Calculator and installation
This model has a source-backed electrical input saved for the US calculator. Daily consumption is an editable usage scenario; startup and wiring still require the exact installation manual.
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Heatso takes your order, payment and delivery and handles returns and warranty support. Confirm the current supplier price, availability and compatibility. Roam Wired may earn a commission through the buying link at no extra cost to you.
Specifications and documents
In the calculator, edit the usage hours and duty cycle for your own trip. The recorded scenario is 27.0W × 8h/day × 0.5 duty = 108.0Wh/day before system losses.
Manufacturer specifications
Published figures for the model shown. Check dimensions, voltage, installation instructions and current specifications with the supplier before ordering.
Heatso · United States
Plan with the exact model
The recorded electrical input is 27W on a 12V DC supply. This is electrical demand, separate from any heating or cooling output.
The starting usage scenario is 8 hours per day at 50.0% duty, or 108Wh/day before system losses. Edit those settings for your trip. This is a planning estimate, not a measured day in your van.
Running input does not establish startup current, cable size or circuit protection. Use the exact installation manual, especially for ignition, pump operation and shutdown cycles.
Add this model to the US calculator
Exact listing and documents
Heatso specification, options & current availability ↗
Technical specification / installation document ↗
The calculator uses a 12V DC / 120V AC planning model. A 24V or 48V product, or a non-US AC configuration, needs a separately checked design.