BenQ TH575i Full HD Projector
- In UK stock, ships from the UK
- UK manufacturer warranty
- UK-based engineers
- No import duty or customs charges
- GBP pricing, UK VAT invoices
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Description
The BenQ TH575i is a high-brightness Full HD home theatre projector built for living rooms where ambient light can't always be controlled. With 3,800 ANSI lumens and DLP imaging, it throws a crisp, punchy 1080p picture up to 120 inches even with the curtains open, backed by dedicated Cinema, Sports, Game and 3D picture modes tuned for different types of content. Built-in Google TV gives instant access to Netflix, Disney+, Prime Video and thousands of other apps without any extra streaming stick, while a 16.7ms input lag in Game mode keeps it responsive enough for casual console play. Auto vertical keystone correction and a 1.1x zoom make setup straightforward in typical room layouts. A 10W built-in speaker, HDMI connectivity and a lamp life of up to 15,000 hours in LampSave mode round out a projector designed for everyday big-screen entertainment rather than a dedicated blackout cinema room.
Key features
High brightness DLP engine delivers a clear, vivid 1080p image even in rooms with ambient light.
Stream Netflix, Prime Video, Disney+ and more directly with no extra dongle required.
16.7ms input lag in Game mode keeps casual console gaming responsive.
Auto vertical keystone and 1.1x zoom simplify projector placement for up to a 120-inch image.
Technical specifications
Throw distance guide
With its 1.49–1.64:1 throw ratio, here's how far the projector needs to sit from the screen for common 16:9 image sizes. Try our throw distance calculator for your exact room.
| Image size | Image dimensions | Lens distance range |
|---|---|---|
| 60" | 1.33 m × 0.75 m | 2.0 m – 2.2 m |
| 80" | 1.77 m × 1.00 m | 2.6 m – 2.9 m |
| 100" | 2.21 m × 1.25 m | 3.3 m – 3.6 m |
| 120" | 2.66 m × 1.49 m | 4.0 m – 4.4 m |
| 150" | 3.32 m × 1.87 m | 4.9 m – 5.4 m |
Planning from a real wall? Use the projector room planner to upload a photo, preview the image to scale and find projectors that fit within your maximum available space.
Distances are lens-to-screen, calculated from the manufacturer's stated throw ratio; allow for lens shift and mounting hardware. Always confirm against the manufacturer's installation guide before fixing mounts.
See it on your wall, to scale
Choose a picture size, then upload a wall photo—or scan the QR code and take it on your phone. We'll show the projected picture at its real size.
Frequently asked questions
How bright is the TH575i, and will it work in a lit room?
It has a high-brightness DLP engine delivering 3,800 ANSI Lumens at 1080p, keeping the image clear and vivid even in rooms with ambient light.
How far from the screen does the TH575i need to be for a large image?
Its throw ratio is 1.49-1.64, and it supports images up to 120 inches. For a 100-inch 16:9 image (about 2.21m wide) that works out to roughly 3.3m to 3.6m from the screen.
How long does the lamp last on the TH575i?
The lamp is rated for up to 15,000 hours when using LampSave mode.
Does the TH575i have built-in streaming apps?
Yes, it has built-in Google TV (Android 11), so you can stream Netflix, Prime Video, Disney+ and more directly with no extra dongle required.
Is the TH575i suitable for casual gaming?
It has a 16.7ms input lag in Game mode at 1080p 60Hz, keeping casual console gaming responsive.
What warranty comes with the TH575i?
The TH575i comes with a 36-month (3 year) warranty.
Delivery & returns
Estimated delivery 29 Aug - 2 Sept. UK mainland delivery only — some large or made-to-order items may carry longer lead times.
Unused items in original packaging can be returned within 14 days of delivery. Faulty items are covered under manufacturer warranty.
Bought in the UK, backed in the UK
This item is in UK stock and ships to you from within the UK, so the order never crosses a customs border on its way to you.
The manufacturer warranty is honoured here in the UK. If something fails, you deal with us — not with an overseas seller in another time zone.
Our own UK-based engineers install, commission and support what we sell, and can attend site when a system needs hands on it.
Delivered within the UK mainland, so there is no import duty, customs charge or courier handling fee waiting for you on delivery.
Prices are in pounds sterling with proper UK VAT invoices, and purchase orders are accepted from approved education accounts — no currency conversion and no surprises at the door.
Payment & security
Pay securely by card. Education customers can apply for a 30-day purchase order account.
Schools, colleges, sixth forms, universities and multi-academy trusts can order on invoice — no card payment required. Purchase orders and credit terms are for education customers only.
All transactions are processed over an encrypted, secure checkout.
Need help specifying this for your space?
Ask Andrew — he knows the full catalogue and can advise on installation, mounting and compatible AV systems.